Answer:
The Sun formed, probably along with other stars, within a large molecular cloud
A close binary consists of two stars that orbit each other every few days
A brown dwarf is a "star" so small in mass that its core never gets hot enough to sustain nuclear fusion reactions.
Most of the gas remaining from the process of star formation is swept into interstellar space by a protostellar wind
As a protostar's internal temperature increases, its growing thermal pressure helps slow its contraction due to gravity.
Explanation:
: ) Hope this helps!
. A 65 kg climber on top of Mt. Everest (8800 m high). How much Pontential Energy does he have?
Answer:
He has 5,609,404 J of potential energy
Explanation:
P.E. = M*G*H
65 * 9.8^2 * 8800
The potential energy of the climber weighing 65 kg at a height of 8800 m is 5.6 × 10⁶ Joules.
What is potential energy?Potential energy of a body is generated by virtue of its position. It is the form of energy stored in an object when it is stationary. When the body stopes its motion, its kinetic energy converts to potential energy.
The potential energy is related to the mass and height of the object from the ground and to the acceleration due to gravity g, by the expression,
PE = m g h.
Given that, mass of the climber = 65 Kg
Height of the mountain = 8800 m
g = 9.8 m/s²
Thus, PE = 65 kg × 8800 m × 9.8 m/s² = 5.6 × 10⁶ Joules.
Therefore, the potential energy of the climber will be 5.6 × 10⁶ Joules.
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How many brain’s does a human brain have? hehe
Answer: one brain... humans have one brain
Explanation: humans have many parts of the brain but they only have one brain there are left brain right brain people. Right brain tends to me more creative and left brain is more logical but its is all still the same brain you just use different parts of the brain at one time
The small piston of a hydraulic lift, has an area of 0.01m2. If a force of 250N is applied to the small piston if it has an area of 0.05m2.
Critical Thinking
Answer:
Explanation:
Given that,
Small piston Hydraulic piston has an area
A1 = 0.01m²
If the force applied is 250N is applied to the small piston at an area of 0.05 m²
Then,
F2 = 250 N and A2 = 0.05m²
Then, applying pascal principle,
Pressure at small area = pressure are bigger area
P1 = P2
F1 / A1 = F2 / A2
F1 / 0.01 = 250 / 0.05
F1 / 0.01 = 5000
Cross multiply
F1 = 5000 × 0.01
F1 = 50 N
Answer:
50N
Explanation:
Pressure = Force/Area
Where P1 = P2
F1/A1 = F2/A2
Given that F1 =? A1 = 0.01m^2
F2= 250N A2= 0.05m^2
F1/0.01m^2 = 250N/0.05m^2
F1 × 0.05= 0.01 × 250
F1 = 0.01×250/0.05
F1 = 2.5/0.05
F1 = 50N
Lumber has been manufactured in Texas since the early nineteenth century. In the beginning, these companies cut down all of the trees before moving on to the next area. Now many lumber companies participate in reforestation which is the natural or intentional restocking of existing forests and woodlands that have been depleted.
What impact does reforestation have on the environment?
A) negative - reforestation provides a sustainable plan to use a renewable resource
B) positive - reforestation provides a sustainable plan to use a renewable resource
C) negative - reforestation provides a sustainable plan to use a nonrenewable resource
D) positive - reforestation provides a sustainable plan to use a nonrenewable resource
i need help toExplanation:
Answer:
B Is the Answer
Explanation: Trust me it is :P
Which weather instrument is used to measure air temperatures recorded on a weather map?
Answer:
Thermometer
Explanation:
Hence the name Thermo meaning heat.
The wavelength of a waterwave is 4.0 X 10^2 m. The wave approaches land at 25 m/s what is the period of the wave?
In 1970, a rocket powered car called Blue Flame achieved a maximum speed of 1.00(10 km/h (278m/s).Suppose the magnitude of the car's constant acceleration is 5.56 m/s^2. If the car is initially at rest , what is the distance traveled. During its acceleration?
Answer:
Distance traveled during this acceleration will be 6950 m
Explanation:
Wear have given maximum speed tat will be equal to final speed of the car v = 278 m/sec
Constant acceleration [tex]a=5.56m/sec^2[/tex]
As the car starts initially starts from rest so initial velocity of the car u = 0 m/sec
From third equation of motion [tex]v^2=u^2+2as[/tex]
Putting all values in equation
[tex]278^2=0^2+2\times 5.56\times s[/tex]
s = 6950 m
So distance traveled during this acceleration will be 6950 m
Define wavelength as it relates to the electromagnetic spectrum.
In relation to the electromagnetic spectrum,wavelength is defined as a distance between peak of waves. It goes on decreasing from moving left to right in the electromagnetic spectrum as the energy increases.
What is electromagnetic spectrum?The electromagnetic spectrum consists of radiation which consists of waves made up of the electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.
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Is it possible to study just one atom?
?
Answer:It is not possibly
Explanation:
Yes, it is possible to study single atoms using techniques like ultrafast laser spectroscopy and devices like the scanning tunneling electron microscope, which allow for detailed observations of individual atomic behavior and theoretical modeling.
Explanation:It is indeed possible to study just one atom. Advanced experimental techniques, such as ultrafast laser spectroscopy and devices like the scanning tunneling electron microscope, have made observations of individual atoms feasible. These methods provide a profound understanding of atomic behavior and properties. Theoretical approaches, which include molecular dynamics calculations, offer insights by numerically solving Newton's equations of motion, thus allowing us to peek into the microscopic world.
This computational approach acts as a bridge toward grasping the complex interactions within systems containing a relatively large number of particles, approaching macroscopic behavior. Furthermore, the derivation of energy levels for electrons within atomic structures showcases the depth of study that individual atoms can be subjected to, advancing our comprehension of nuclear and electronic properties.
Complete the ray diagram for an object in front of a lens to show how to find the location and size of the image from the location and size of the object. F labels the focal points of the lens.
In this case draw all the rays needed to locate the object, then state whether the image is real or virtual, and upright or inverted.
Draw directly on the incomplete diagram provided.
Answer:
Answer:
Image is real and inverted
Explanation:
The ray diagram representing the situation is shown in attachment.
In this problem, we have a convex lens, which is curved outward at its centre; the rays of light reaching the lens parallel to the principal axis are refracted into the focal point of the lens.
Therefore, in order to build the ray diagram of this situation and draw the image, we proceed as follows:
1) First, we draw a ray of light parallel to the principal axis and going from the tip of the object towards the lens, then this ray is refracted towards the focal point on the other side
2) Then, we draw another ray of light going from the tip of the object towards the centre of the lens and continuing on the other side of the lens
The intersection point of rays 1) and 2) gives the position of the tip of the image.
Looking at the attached figure, we see that the image is:
- Real, because it is produced on the other side of the lens
- Inverted, as it is upside down
When the rays are drawn so here the Image should be considered as real and inverted.
Ray diagram:Since it is the convex lens that curved outward at the center. Here the rays of light should be reached the lens that parallels to the principal axis also it should be refracted into the focal point of the lens.
Also, the first ray of light should be drawn, then the other ray of light should be gone from the tip of the object. It should be real since it is generated on the other side of the lens. And, it should be inverted since it is upside down.
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A 1.50-kg iron horseshoe initially at 550°C is dropped into a bucket containing 25.0 kg of water at 20.0°C. What is the final temperature of the water–horseshoe system? Ignore the heat capacity of the container and assume a negligible amount of water boils away.
Answer:
Te = 23.4 °C
Explanation:
Given:-
- The mass of iron horseshoe, m = 1.50 kg
- The initial temperature of horseshoe, Ti_h = 550°C
- The specific heat capacity of iron, ci = 448 J/kgC
- The mass of water, M = 25 kg
- The initial temperature of water, Ti_w = 20°C
- The specific heat capacity of water, cw = 4186 J/kgC
Find:-
What is the final temperature of the water–horseshoe system?
Solution:-
- The interaction of horseshoe and water at their respective initial temperatures will obey the Zeroth and First Law of thermodynamics. The horseshoe at higher temperature comes in thermal equilibrium with the water at lower temperature. We denote the equilibrium temperature as (Te) and apply the First Law of thermodynamics on the system:
m*ci*( Ti_h - Te) = M*cw*( Te - Ti_w )
- Solve for (Te):
m*ci*( Ti_h ) + M*cw*( Ti_w ) = Te* (m*ci + M*cw )
Te = [ m*ci*( Ti_h ) + M*cw*( Ti_w ) ] / [ m*ci + M*cw ]
- Plug in the values and evaluate (Te):
Te = [1.5*448*550 + 25*4186*20 ] / [ 1.5*448 + 25*4186 ]
Te = 2462600 / 105322
Te = 23.4 °C
Answer:
Final temperature = 23.4 °C
Explanation:
The idea here is that the heat lost by the metal will be equal to the heat gained by the water.
In order to be able to calculate the final temperature of the iron + water system, we need to know the specific heats of water and iron which are;
C_water = 4.18 J/g°C
C_iron = 0.45 J/g°C
The formula to determine the determine the amount of heat lost or gained is given by;
q = m•c•ΔT
q = heat lost or gained
m = the mass of the sample
c = specific heat of the substance
ΔT = the change in temperature, defined as final temperature minus initial temperature
Now, -q_water = q_iron
The negative sign is used here because heat lost carries a negative sign. Let's say that the final temperature of the iron + water system will be T_f
Thus, we can say that the changes in temperature for the iron and for the water will be;
ΔT_iron = T_f − 550 °C
and ΔT_water = T_f − 20 °C
This means that we will now have;
−m_iron•c_iron•ΔT_iron = m_water•c_water•ΔT_water
This now gives us ;
−m_iron•c_iron•(T_f − 550°C) = m_water•c_water•(T_f − 20°C) - - - - (eq1)
Notice that the specific heats for these two substances is given per gram. This means that you will have to
Mass of iron = 1.5 kg = 1500g
Mass of water = 25 kg = 25000 g
Plugging the relevant values into eq(1),we have;
−(1500g)•(0.45 J/g°C)•(T_f − 550°C) = (25000 g)•(4.18 J/g°C)•(T_f − 20°C)
Multiplying out to get;
-675(T_f − 550) = 104,500(T_f − 20)
-675T_f + 371,250 = 104,500T_f - 2090000
371,250 + 2090000 = 104,500T_f + 675T_f
2461250 = 105175T_f
T_f = 2461250/105175 = 23.4 °C
A student adds 5 grams of sugar to 1 liter of water one sugar solution. Then, they add 10 grams of sugar to 1 liter of water to make another sugar solution. Which statement correctly compares these solutions?
The solution with 10 grams of sugar per liter is hypertonic to the one with 5 grams of sugar per liter. Comparatively, the solution with 45 grams of sugar in 100 mL of water is much more hypertonic than both. The cup with more sugar has less water compared to the cup with less sugar due to the displacement of water by sugar.
When comparing two sugar solutions with different amounts of sugar but the same volume of water, the solution with more sugar is considered hypertonic, and the one with less sugar is hypotonic. In the given scenario, a student created two solutions by dissolving different amounts of sugar in equal volumes of water. The first solution with 5 grams of sugar is hypotonic compared to the second solution, which has 10 grams of sugar in the same volume of water (1 liter), making the second solution hypertonic to the first.
To further illustrate this with a different example, if you have 100 mL of water and add 45 grams of sugar, you will have a more concentrated (hypertonic) solution compared to a solution where you add a lesser amount of sugar to the same volume of water. This is because the hypertonic solution has a greater solute concentration. Comparatively, the solution with lesser sugar concentration, in this case, 5 grams per liter, would be hypotonic to the one with higher sugar concentration, which is 10 grams per liter or even more substantially to the one with 45 grams in 100 mL.
Therefore, when the volume is the same, the cup with the larger amount of sugar has less water due to the space taken by the sugar, and vice versa. This scenario is another way to understand the concept of hypertonic and hypotonic solutions based on solute concentration and the displacement of the solvent (water) by the solute (sugar).
Two people push on a boulder to try to move it. The mass of the boulder is 825 kg. One person pushes north with a force of 64 N. The other pushes west with a force of 38 N. Predict the magnitude of the acceleration of the boulder. Assume that friction is negligible.
Answer:
0.09 m/s²
Explanation:
Acceleration: This can be defined as the rate of change of velocity.
The S.I unit of acceleration is m/s².
From the question, expression for acceleration is given as
F' = ma
Using Pythagoras Theory,
√(F₁²+F₂²) = ma................... Equation 1
Where F₁ = Force of the First person on the boulder, F₂ = Force of the Second person on the boulder, F' = resultant force acting on the boulder, m = mass of the boulder, a = acceleration of the boulder.
make a the subject of the equation
a = √(F₁²+F₂²) /m................ Equation 2
Given: m = 825 kg, F₁ = 64 N, F₂ = 38 N,
Substitute into equation 2
a = [√(64²+38²)]/825
a = {√(5540)}/825
a = 74.43/825
a = 0.09 m/s²
The magnitude of the acceleration of the boulder, with a mass of 825 kg being pushed with forces of 64 N northward and 38 N westward, is approximately 0.09 m/s² assuming negligible friction.
To predict the magnitude of the acceleration of the boulder, we can use Newton's second law of motion, which states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (a = F/m). Since the forces are applied in perpendicular directions (north and west), we can treat them as components of a resultant force vector and calculate the resultant force using Pythagoras' theorem: Fr = sqrt(Fn² + Fw²), where Fn is the northward force and Fw is the westward force.
By plugging the given values into the equation, we get Fr = √((64 N)² + (38 N)²) = √(4096 + 1444) = √(5540) N ≈ 74.43 N. We then divide this resultant force by the mass of the boulder to find the acceleration: a = Fr / m = 74.43 N / 825 kg ≈ 0.09 m/s².
The magnitude of the acceleration of the boulder, assuming negligible friction, is approximately 0.09 m/s².
What kinds of information does the ALMA radio telescope provide?
Answer:
ALMA is a trans-formative radio telescope that can study cosmic light that straddles the boundary between radio and infrared. Most objects in the Universe emit this kind of energy, so the ability to detect it has been a driver for astronomers for decades.
Explanation:
Answer:
the location of dust and gases in space
places where stars will be born
Explanation:
A force of 8 N is used to drag a chair 2.5 metres across a room. Calculate the work done to move the chair.
Answer:
Explanation:
GIVEN
Force (F) = 8 N
Distance (d) = 2.5 metres
Work done = ?
WE know we have the formula
work done = F * d
Work done = 8 * 2.5
= 20 Joule
Hope it helps :)
Work is measured in Joule. The work done by the given chair is 20 J.
Work:
It is defined as the amount change in the energy. It is the product of force applied and displacement due to force.
Formula for work,
W = F x d
Where,
F - Force applied = 8 N
d - Distance = 2.5 meters
W - Work done = ?
Put the values in the formula,
[tex]\bold {W = 8\times 2.5 }\\\\\bold {W = 20\ J}[/tex]
Therefore, the work done by the given chair is 20 J.
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What often happens to light when it travels from one medium to another
Answer:
Although the speed changes and wavelength changes, the frequency of the light will be constant. The frequency, wavelength, and speed are related by: The change in speed that occurs when light passes from one medium to another is responsible for the bending of light, or refraction, that takes place at an interface.
Explanation:
Billions of stars in the same region of the universe are called
Olivia wants to find out whether a substance will fluoresce. She says she should put it in a microwave oven. Do you agree with her? Why or why not?
Answer:
In disagreement
Explanation:
Fluorescence can be defined as the phenomenon by which an object emits visible light when placed in front of ultraviolet light. In fluorescence, the absorbed light increases the energy band of the electrons, causing them to go into a more excited state. The electrons, before they release the absorbed energy in the form of light, lose a part of the energy due to the vibration of the molecules. When they return to their initial state, the electrons will emit light.
While microwaves are electromagnetic waves whose frequency is high, and are used for the transmission of high-speed telegraphic signals and for the communication of satellites and do not emit light.
Sample Response: I disagree with her because many substances show fluorescence under ultraviolet light, not microwaves.
edge
What is the net force acting on a falling 1-kg ball if it encounters 2 n of air resistance?
Answer:
Net Force= -7.8N
Explanation:
fist start by solving the weight of the ball, this means the force pushing the ball down and the mass of the ball combined. we know that the force acting on the ball is gravity. the force of gravity is equivalent to 9.8m/s^2
weight formula w=mg. w= weight m= mass g= gravity
w=1kg(9.8m/^2)
w=9.8kg.m/s^2
w=9.8N
Simply add the two forces together to get the net force. The weight 9.8N is negative since it is directed downwards, while the air resistance 2N is positive since it is directed upwards.
Fnet= -9.8N+2N
Fnet= -7.8N
A 1-kg ball falling to the earth experiences a gravitational force of 9.8 N. With air resistance of 2 N, the net force acting on the body is 7.8 N.
Explanation:
The net force acting on a 1-kg ball falling due to gravity can be calculated by using Newton's second law. The gravitational force (weight) is equal to the mass times the gravity acceleration on Earth's surface. Thus, it is 1 kg times 9.8 m/s^2, which equals 9.8 N. However, the object encounters air resistance of 2 N, therefore, the net force on the object would be the gravitational force minus the air resistance: 9.8 N - 2 N = 7.8 N.
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Cooling systems, such as air conditioners and refrigerators, transfer thermal energy in order to keep homes and cars cool or to keep food cold. In a refrigerator, for example, thermal energy is transferred from the cool air inside the refrigerator to the warmer air in the kitchen. Thermal energy naturally moves from a warmer area to a cooler area, so how can it move from the cooler refrigerator to the warmer room?
Refrigerators and air conditioners use heat transfer, requiring a work input, to move thermal energy from cooler to warmer spaces. They absorb thermal energy from the cooler area, transfer it to a hotter reservoir while discharging heat back into the environment. These are essentially heat engines run backward, not in strict reverse.
Explanation:Contrary to what may seem natural, appliances like refrigerators and air conditioners utilize a concept known as heat transfer to move thermal energy from a cooler space to a warmer one. This process requires a work input, typically provided by a motor or cooling substance.
The process occurs in stages. Firstly, the appliance absorbs thermal energy (denoted as Qc) from the cooler area. Secondly, this energy is transferred to a hotter reservoir, simultaneously discharging thermal energy (Qh) back into the warmer environment. The work input (W) is crucial here as it aids in moving the energy from the cool to the warm region, thereby keeping the cooler region at a lower temperature.
Finally, it's important to remember that these systems don't exactly run in reverse. Instead, they are essentially heat engines run backward, implying that while they perform opposite functions, they don't strictly follow a reversed process of a heat engine.
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Most of the mass of the solar system is located in
Answer:
The sun
Explanation:
somewhere between 99.8 and 99.9 percent. The rest is split between the planets and their satellites, and the comets and asteroids and the dust and gas surrounding our star.
On a flat, level road, a 1500-kilogram car travels around a curve having a constant radius of 45 meters. The centripetal acceleration of the car has a constant magnitude of 3.2 meters per second squared. Calculate the car's speed as it travels around the curve
Answer:
Speed of the car around the circular path will be 12 m/sec
Explanation:
We have given mass of the car m = 1500 kg
Radius of the curve r = 45 m
Centripetal acceleration of the car [tex]a=3.2m/sec^2[/tex]
We have to find the speed of the car
We know that centripetal acceleration is given by [tex]a=\frac{v^2}{r}[/tex], here v is car speed along the circular path and r is radius of the curve
So [tex]3.2=\frac{v^2}{45}[/tex]
[tex]v^2=144[/tex]
v = 12 m/sec
So speed of the car around the circular path will be 12 m/sec
The car's speed as it travels around the curve is 12m/sec.
Given that,
On a flat, level road, a 1500-kilogram car travels around a curve having a constant radius of 45 meters. The centripetal acceleration of the car has a constant magnitude of 3.2 meters per second squared.Based on the above information, the calculation is as follows:
[tex]3.2 = v^2 \div 45\\\\v^2 = 144[/tex]
v = 12
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Why do photons take so much longer than neutrinos to emerge from the sun?
Answer:
Because of the strong interaction of photons with matter,neutrinos rarely interact with matter
Explanation:
In the core of the sun,nuclear fusion which is a nuclear reaction,produces the photons and neutrinos,for photons to emerge from the sun's core it passes through denser particles colliding and losing energy as it moves at such it can take it up to a million years to emerge from the sun core.Unlike the neutrinos that has more easier path,with little or no collission.
Photons take a long time to exit the sun due to repeated absorption and re-emission by atoms, resulting in a slow, zigzag path. On the other hand, neutrinos, which interact weakly with matter, can pass straight through the sun rapidly, taking just a bit over 2 seconds.
Explanation:The reason why photons take much longer than neutrinos to emerge from the sun is due to their interactions with atoms inside the sun's dense core. When photons, which are energy particles produced by nuclear reactions, try to exit the sun, they end up getting absorbed or scattered by atoms, resulting in their paths being zigzag or random. This absorption and reemission process significantly slows down their journey, causing it to take between an estimated 100,000 to 1,000,000 years for them to reach the surface.
On the other hand, neutrinos, another type of particle produced by nuclear reactions, interact minimally with matter. This weak interaction enables them to pass straight through the sun's interior, reaching its surface in a little over 2 seconds. While photons eventually give up enough energy to become visible light that we see as sunlight, neutrinos escape the sun and radiate into space almost immediately after they're created.
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You are 2.4 m from a plane mirror, and you would like to take a picture of yourself in the mirror. You need to manually adjust the focus of the camera by dialing in the distance to what you are photographing. What distance do you dial in
Answer:
4.8 m
Explanation:
A mirror is a reflecting surface on which rays of light are reflected. Reflection occurs when a ray of light bounces off a surface, coming back into the original medium.
There exists two types of mirrors:
- Flat mirrors: they consist of a flat surface
- Curved mirrors: they consist of curved surfaces. They are further divided into convex mirrors and concave mirrors.
For a flat mirror, the image produced from the mirror is always:
- Virtual (on the other side of the mirror)
- Of the same size as the object
- Laterally inverted
- Upright (same orientation as the object)
Moreover, the image produced by a flat mirror is at the same distance from the mirror as the object.
So in this case, since the person is 2.4 m from the mirror, then the image is produced 2.4 m from the mirror (but on the other side).
This means that the total distance between you and your image in the mirror is:
d = 2.4 + 2.4 = 4.8 m
Therefore, the focus of the camera must be adjusted to be at 4.8 m.
Technician A says that hill assist and hill descent controls are added features to some electronic stability control systems. Technician B says that trailer sway control is an added feature to some electronic stability control systems. Who is correct
Answer:
Both technicians A and B
Explanation:
Both trailer sway control, hill assist and hill descent controls are additional featires that enhance stability of electronics and their control systems. Majorly, these features track and reduce skidding in electronics, therfore, enhancing electronic system stability. During the process, these newly added features help to automatically apply brakes and direct the sytem where the controller wants to take it.
"A total charge of 9.0 mC passes through a wire in 3.5 seconds. What is the current in the wire? How many electrons pass through the cross-sectional area in 10.0 s? If the number of charges that pass through the cross-sectional area during the given time interval doubles, what is the resulting current?"
1) 0.00257 A
2) [tex]1.6\cdot 10^{17}[/tex] electrons
3) 0.00512 A
Explanation:
1)
A current is defined as the flow of charge through a conductor.
The intensity of current is calculated as:
[tex]I=\frac{q}{t}[/tex] (1)
where
q is the amount of charge passing through a certain point in the conductor
t is the time interval during which this charge passes
In the wire in this problem we have:
[tex]q=9.0 mC=0.009 C[/tex] is the charge
[tex]t=3.5 s[/tex] is the time elapsed
Therefore, the current in the wire is:
[tex]I=\frac{0.009}{3.5}=0.00257 A[/tex]
2)
To find the total charge passing through a given point of the wire in a certain time, we re-arrange eq. (1):
[tex]q=It[/tex]
where
I is the current
t is the time interval we are considering
In this problem we have:
I = 0.00257 A is the current in the wire
t = 10.0 s is the time we are considering
Therefore, the charge is:
[tex]q=(0.00257)(10.0)=0.0257 C[/tex]
We know that this charge q consists of N electrons, so we can write
[tex]q=Ne[/tex]
where
[tex]e=1.6\cdot 10^{-19}C[/tex] is the charge of one electron
Solving for N, we find:
[tex]N=\frac{q}{e}=\frac{0.0257}{1.6\cdot 10^{-19}}=1.6\cdot 10^{17}[/tex]
3)
In this problem, we are told that the number of charges that pass through the cross-sectional area during the given time interval doubles, so we have:
[tex]N'=2N=2(1.6\cdot 10^{17})=3.2\cdot 10^{17}[/tex]
Therefore, the total charge through the point in the wire in a time of
t = 10.0 s
will be
[tex]q'=N'e=(3.2\cdot 10^{17})(1.6\cdot 10^{-19})=0.0512 C[/tex]
And so, the current in this case will be
[tex]I'=\frac{q'}{t}=\frac{0.0512}{10.0}=0.00512 A[/tex]
And we see that this current is twice the current we had in part 1), because the current is proportional to the number of charge carriers.
The charges are [tex]0.00257\ A[/tex], [tex]1.6 \times 10^{17}[/tex] electrons, and [tex]0.00512 \ A[/tex], and their further calculation can be defined as follows:
Current calculation:For part 1:
A movement of energy via a conductor is known as just a current.
This current's strength is computed as:
[tex]I=\frac{q}{t}.....(1)[/tex]
wherein q is the quantity of charge travelling through a specific location in the conductor, and t denotes a time interval during which this charge flows.
In the this problem, we have the following wire:
[tex]\to q=9.0 \ m C=0.009\ C[/tex] charges
Time elapsed [tex]t=3.5 \ s[/tex]
current wire:
[tex]\to I=\frac{0.009}{3.5}= 0.00257 \ A[/tex]
For part 2:
You re-arrange eq. (1) to obtain that total charge passing through a particular location of the wire inside a given time.
[tex]\to q=It\\\\[/tex]
where
current =I
interval time =t
[tex]I = 0.00257\ A[/tex] current in the wire
[tex]t = 10.0\ s[/tex]
Calculating the charge:
[tex]\to q=(0.00257) (10.0) =0.02575\ C[/tex]
We assume there are N electrons in this test charge, thus we can write
[tex]q=Ne\\\\[/tex]
where
Calculating the charge in one electron
[tex]e=1.6 \times 10^{-19}\ C[/tex]
Solving for N:
[tex]\to N=\frac{q}{e}=\frac{0.0257}{1.6\times 10^{-19}}=1.6 \times 10^{17}\\\\[/tex]
For point 3:
A number of charges which it pass through the cross-sectional area during the given time interval doubles in this issue, so we have:
[tex]\to N'=2N=2(1.6 \times 10^{17})=3.2\times 10^{17}\\\\[/tex]
As a result, the complete charge passed through the wire point in a period of
[tex]t = 10.0\ s\\\\[/tex]
[tex]\to q'=N'e=(3.2\times 10^{17})(1.6\times 10^{-19})=0.0512\ C\\\\[/tex]
So, in this scenario, the current will be
[tex]\to I'=\frac{q'}{t}=\frac{0.0512}{10.0}=0.00512\ A\\\\[/tex]
Because the current is proportional to the number of charge carriers, we can see that this current is twice as large as the current we had in part 1.
Find out more about the total charge here:
brainly.com/question/26142659
A 90 kg person stands at the edge of a stationary children's merry-go-round at a distance of 5.0 m from its center. The person starts to walk around the perimeter of the disk at a speed of 0.80 m/s relative to the ground. What rotation rate does this motion impart to the disk if [tex]I_{disk} = 20,000 kg*m^2[/tex]. (The person's moment of inertia is [tex]I = mr^2[/tex])
Answer:
[tex]\omega = 0.016\,\frac{rad}{s}[/tex]
Explanation:
The rotation rate of the man is:
[tex]\omega = \frac{v}{R}[/tex]
[tex]\omega = \frac{0.80\,\frac{m}{s} }{5\,m}[/tex]
[tex]\omega = 0.16\,\frac{rad}{s}[/tex]
The resultant rotation rate of the system is computed from the Principle of Angular Momentum Conservation:
[tex](90\,kg)\cdot (5\,m)^{2}\cdot (0.16\,\frac{rad}{s} ) = [(90\,kg)\cdot (5\,m)^{2}+20000\,kg\cdot m^{2}]\cdot \omega[/tex]
The final angular speed is:
[tex]\omega = 0.016\,\frac{rad}{s}[/tex]
Using the principle of conservation of angular momentum, the person's movement imparts an angular velocity of 0.018 rad/s to the disk.
To solve this problem, we'll need to use the principle of conservation of angular momentum, which states that the total angular momentum before an event must equal the total angular momentum after the event if no external torques act on the system.
Given Data:
Mass of the person, m = 90 kgDistance from the center, r = 5.0 mSpeed of the person relative to the ground, v = 0.80 m/sMoment of inertia of the disk, I(disk)= 20,000 kg·m²First, calculate the person's moment of inertia relative to the center of the disk:
I(person) = m * r2 = 90 kg * (5.0 m)² I(person) = 2250 kg·m²Initial angular momentum of the person (since they are initially stationary) is 0.
When the person starts moving, they contribute angular momentum relative to the axis:
L(person) = I(person) * ω L(person) = 2250 kg·m² * v/r L(person) = 2250 kg·m² * 0.8 m/s / 5.0 m L(person) = 360 kg·m²/sSince the merry-go-round was initially stationary, its initial angular momentum L(disk-initial) is 0.
By conservation of angular momentum, the total angular momentum before must equal the total angular momentum after:
L(total-initial) = L(total-final)0 + 0 = I(disk) * ω + L(person)0 = 20,000 kg·m² * ω + 360 kg·m²/sSolving for the angular velocity ω of the disk:
ω = -360 kg·m²/s / 20,000 kg·m² ω = -0.018 rad/sHence, the disk will rotate with an angular velocity of 0.018 rad/s in the direction opposite to the person’s motion due to the conservation of angular momentum.
When current is flowing through a car’s rear defroster (Exercise 33), the voltage at each end of the metal strips is different. Which end of each strip has the higher voltage, the one through which current enters the strip or the one through which current leaves, and what causes the voltage drop?
The voltage released because the charges in the current dropped electric potential energy; this energy loss occured due to the resistance of the metal strips.
Explanation:
Current flows from huge voltage (high potential) to base voltage (low potential). So the end of the strip wherever the current goes at a higher voltage than the end of the strip where the current leaves. The voltage released because the charges in the current dropped electric potential energy; this energy loss occured due to the resistance of the metal strips. The electric potential energy converted into thermal energy, heating the strips.
Rank the following objects from least momentum to most momentum.
Fast car .Parked truck.
Slow car .Fast baseball.
Fast feather
Answer:
Parked truck
Fast feather
fast baseball
slow car
fast car
Demagnetize
Which events cause ferromagnetic materials to magnetize and which events cause them to demagnetize?
Answer:
Magnetize: place in magnet field, rub on permanent magnet, pass electricity through
Demagnetize: heat, strike, place in opposite polarity
Explanation:
Final answer:
Ferromagnetic materials can be magnetized by aligning their magnetic domains with an external magnetic field, which may become permanent, making them permanent magnets. Demagnetization occurs when these domains are misaligned due to heat, physical disturbance, or an opposing magnetic field.
Explanation:
Ferromagnetic materials such as iron, cobalt, nickel, and gadolinium exhibit strong magnetic effects. These materials can become magnetized in the presence of an external magnetic field due to the alignment of their magnetic domains. Magnetization occurs when the domains within the ferromagnetic material align with the magnetic field lines, and this alignment can become permanent, turning the material into a permanent magnet. Conversely, demagnetization can occur when these domains lose their alignment, often due to factors such as heat, hammering, or an opposing magnetic field.
Demagnetization typically happens when the material is heated to its Curie temperature, at which point the ferromagnetism disappears. Alternatively, demagnetization can occur when the material is exposed to an external magnetic field in a direction opposite to the magnet's existing fields, or through physical disturbance such as dropping or hammering.