Answer:
False
Explanation:
the three types are transverse, longitude, and boundary
3. Force = _____ x _____?
Answer:
Explanation:
Force = mass * acceleration.
What generates the magnetic field that surrounds a wire carrying an electric current?
Answer:
A,B,E
Explanation:
Magnetic fields are produced by moving electric charges.
What is an electromagnet?
Electromagnet is a temporary magnet. It is made by winding wire around an iron core. As current flows in the coil the iron becomes a magnet, and when the current is turned off it looses it's magnetic properties.
Magnetic fields are produced by moving electric charges.
Everything around us is made up of atoms, and each atom has a nucleus made of neutrons and protons with electrons that orbit around the nucleus. The orbiting electrons are tiny moving charges. A small magnetic field is created around each atom.
Magnetic fields produced from charges, similarly to electric fields, but are different in that the charges must be moving.
Long straight wire carrying a current is the example of a moving charge that generates a magnetic field.
Therefore,
Moving electric charges produced magnetic field.
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Fig. 9.1
(i) On Fig. 9.1, mark the north and south poles of the magnet, using the letters N and S.
[2]
(ii) A small piece of unmagnetised iron is placed at A.
What, if anything, happens to it?
(iii)
A small piece of positively charged plastic is placed at B.
What, if anything, happens to it?
Answer:
Okay let say from the diagram you have more force come in from the B point of the magnet and release out from A point of the magnet. so lets say north is always the attractive spot and south is your releasing spot.
Explanation:
meaning from magnet the north pole attracts objects and the south pole repeal object.
With an average speed of 67m/s, how long does it take a falcon to dive to the ground
along a 150m path?
Answer:
approx 2.23 seconds
Explanation:
150/67
s=d/t and t=d/s
Which equation is used to calculate the electric potential in an electric field from a point charge? V = kq over d squared V = kq over d V =delta U over q V = delta U over E
Answer:
The answer is V =delta U over q
Explanation:
Electric potential is defined as the magnitude of the electric field through the potential energy that a charge would have if placed at that point. Mathematically, the potential is defined with the following expression:
[tex]V=\frac{E_{p} }{q}[/tex]
where:
V is the electric potential. Its unit is Julius by Coulomb (J/C).
Ep is the electric potential energy that has a charge
q is the charge
In the question Ep = ΔU
Answer:
The answer is V=kq/d
Explanation:
The electrostatic potential is defined in terms of work done in taking a unit positive charge from infinity to the point in question.
V=kq/d
Where d= distance from infinity to the point in question
k= constant of proportionality
q= attracting charge
The electric potential is measured in volts
find the rate of positive acceleration of an automobile which went from a complete stop to a velocity of 30 meters per second in 10 seconds
Answer:
3 m/s^2
Explanation:
acceleration= Change in velocity/time
= 30-0 / 10
= 30/10
=3 m/s^2
An electrical short cuts off all power to a submersible diving vehicle when it is a distance of 29 m below the surface of the ocean. The crew must push out a hatch of area 0.950 m2 and weight 390 N to escape.
If the pressure inside is 1.0atm, what downward force must they exert on the hatch to open it?
Answer:
277983.465 N
Explanation:
[tex]\rho[/tex] = Density of seawater = [tex]1030\ kg/m^3[/tex]
g = Acceleration due to gravity = 9.81 m/s²
h = Depth = 29 m
w = Force = 390 N
A = Area = [tex]0.95\ m^2[/tex]
Force in the system would be
[tex]F=(\rho gh)A-w\\\Rightarrow F=(1030\times 9.81\times 29)\times 0.95-390\\\Rightarrow F=277983.465\ N[/tex]
The downward force must they exert on the hatch to open it is 277983.465 N
Shah did not trust the results of an experiment that she had read about, so she is conducting the experiment herself. She goes through the same set of steps and measures the effect of the amount of sugar on a single organism.
Which best describes what Shah is doing?
The question is incomplete, the complete question is;
Shah did not trust the results of an experiment that she had read about, so she is conducting the experiment herself. She goes through the same set of steps and measures the effect of the amount of sugar on a single organism.
Which best describes what Shah is doing?
replication
repetition
both repetition and replication
neither repetition nor replication
Answer:
replication
Explanation:
Replication in scientific experiments refer to the process of going through all the steps in an experiment in order to obtain the same set of results initially obtained.
All scientific experiments is expected to be replicated under identical experimental conditions. If the results obtained by a scientific investigation cannot be replicated under identical circumstances by other scientists, then the scientific data must be taken with a pinch of salt.
Shah is expected to obtain almost exactly the same data as the original researchers who first published the data.
Answer:
The correct answer is replication
Explanation:
Sunspots change in number and location during the solar cycle. This phenomenon is connected to
Answer:
Continuously changing magnetic field of the Sun
Explanation:
The Sun is made up of plasma and is not solid like our planet. When it rotates the whole of the Sun doesn't rotate with same speed. The equatorial part completes the rotation in just 25 days whereas the poles do it in 35 days. Due to this the magnetic field lines entangle and reorganize them regularly.
The places where the field line exit and enter the surface of the Sun, temperature drops by around 1000 K thus these spots appear black in color and are known as Sun spots.
The magnetic field is not permanent as it will keep changing due to differential rotation. This will result in the change in the no. of location of Sun spots.
If we track the no. of sunspots visible with respect to years we will notice that they follow a cycle of 10.6 years. This is known as Solar cycle in which there comes a solar minima when we see very few sunspots. When it is solar maxima we can see more than 100 sunspots.
Andrea asked her brother to take a 4 ft floating raft out of the water near the wave-swept shore. Using this raft as a measuring tool, she estimated that the wavelengths of these particular ocean waves were about 11 ft.
How fast are these surface ocean waves if the frequency remains 16 Hz?
Answer in units of ft/s.
Answer:
176ft/s
Explanation:
Speed of a wave is a function of the frequency and wavelength of the wave. It is expressed mathematically as:
V = fλ where:
V is the speed of the wave
f is the frequency
λ is the wavelength
Given f = 16Hz, λ = 11ft
V = 16×11
V = 176ft/s
Describe how the solar radiation that arrives at the equator is redistributed around the earth through atmospheric circulation.
The energy that reaches the Earth's equator is redistributed through air currents and ocean currents.
Atmospheric circulation is a term used in geography to refer to the movement of air on a large scale that serves as the distribution of solar heat on the surface of the Earth.
As a result of the latitudinal circulation, the solar radiation (that affects the low equatorial latitudes) uses air currents, differences in atmospheric pressure and water currents to distribute itself throughout the Earth's atmosphere.
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Solar radiation at the Earth's equator is converted into thermal radiation that is redistributed by the atmosphere and oceans, in a process known as atmospheric circulation. This energy transfer is facilitated by convection currents within the atmosphere and is influenced by Earth's rotation. Some of this reradiated heat is trapped by greenhouse gases, contributing to the greenhouse effect.
Explanation:The solar radiation arriving at the Earth's equator is redistributed around the globe through a process known as atmospheric circulation. This circulation is crucial for weather patterns and global climate phenomena. Here's a step-by-step breakdown:
Solar Radiations: The Earth receives almost all its energy from the Sun's radiation, which is more intense at the equator due to the direct incidence of sunlight. Heat Redistribution: These solar radiations are converted into thermal radiation on Earth's surface, some of which is reradiated back into the atmosphere. The atmosphere and oceans play a crucial role in redistributing this heat from warmer to cooler areas. They essentially transport heat energy from the equator towards the poles, maintaining a balance. Atmospheric Circulation: Within the atmosphere, deep convection currents of rising hot air (near the equator) and falling cooler air (closer to the poles) help circulate this energy. Such motions are influenced by Earth's rotation, leading to patterns of atmospheric circulation. Greenhouse Effect: Some of the infrared or heat radiation emitted from Earth's surface gets trapped by greenhouse gases (e.g., water vapor, methane, and CO2) in the atmosphere, leading to a warmer planet. This is known as the greenhouse effect.Learn more about Atmospheric Circulation here:
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If the number of electrons per unit volume in the copper is 8.46 × 10²⁸ m⁻³ and the current in the strip is 19.0 A, calculate the potential difference across the width of the strip when conditions have been allowed to equilibrate.
The first part of the question is missing and it says;
Electrons are made to flow through the copper strip of as shown in the attached image . The strip's cross section is 1.00 mm high and 30.5 mm wide, and the strip is placed in a magnetic field B = 4.00T
Answer:
Hall potential difference = 5.6 x 10^(-6) V
Explanation:
We are given that;
Thickness of copper strip; L = 1mm = 1 x 10^(-3)m
Width of copper strip; W = 30.5mm
Magnetic field; B = 4T
Current in the strip = 19A
Number density; n = 8.46 × 10²⁸ m⁻³
Formula for number density of charge is given by;
n = (B•I)/(V•L•e)
Where;
B is uniform Magnetic field
I is current
V is potential difference
L is thickness of strip
e is electron charge = 1.6 x 10^(-19)C
Thus, let's make V the subject;
V = (B•I)/(n•L•e)
V = (4 x 19)/(8.46 × 10²⁸•1 x 10^(-3)•1.6 x 10^(-19))
V = 76/(13.536 x 10^(6)) = 5.6 x 10^(-6) V
The earth is warmed by solar energy how is this energy transferred from the sun to the earth
Answer:
Energy is transferred from the Sun to the Earth through radiation. As water is heated by the sun, it evaporates. The water vapor then condenses and forms clouds in the atmosphere.
Explanation:
When the Sun's energy moves through space, it reaches Earth's atmosphere and finally the surface. This radiant solar energy warms the atmosphere and becomes heat energy. This heat energy is transferred throughout the planet's systems in three ways: by radiation, conduction, and convection.
The energy transferred from the sun to the earth in the form of electromagnetic radiation. This radiant energy warms earth.
What is radiation?Radiation can be described as the energy that moves from one place to another in a form that can be defined as waves or particles.
There is a wide range of electromagnetic radiation from which visible light is one example.
Radiation with the highest energy like ultraviolet radiation, X-rays, and gamma rays. X-rays and gamma rays exhibit a lot of energy.
When radiations interact with atoms, they remove electrons and cause the atom to become ionized. Radiation can be transferred heat energy through space by electromagnetic radiation.
Most of the radiations that comes to the earth from the sun are invisible. Only a small part comes as visible light because light is composed of waves of different frequencies. Therefore, electromagnetic radiations coming from the sun warm the earth.
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A 1000 kg car traveling 20 m/s east experiences an impulse of 2000 Ns west. What is the final velocity of the car after the impulse has been applied?
Answer:
V=18 m/s
Explanation:
Impulse is represented by Δp. It can be expanded such as: Δp = m(v-u) , where m is mass, v is final velocity, and u is initial velocity. (sorry ib physics things)
You can substitute your given values into the equation.
Δp = -2000 (i kept this as negative since it is going the opposite direction to your initial velocity)
m = 1000 kg
u = 20 m/s
1. -2000 = 1000(v-20) --> -2000/1000
2. -2 = v-20 --> -2 + 20
3. v = 18 m/s
You can always double check your answer by substituting it back into the original equation to make sure the Δp = -2000
_______ is a liquid that absorbs and releases thermal energy.
Answer:
Refrigerator is a liquid or substance that absorbs and releases thermal energy.Explanation:
Refrigerator creates liquid by increasing the pressure of the refrigerator vapor inside and forcing them outside the refrigerator into the coils.This is the process which leads to the conversion of the hot gas in the refrigerator coils into liquid form.The liquid form of the refrigerator subsequently absorbs the heat that is created inside the refrigerator thereby cooling the air inside and releasing thermal energy in the process.use these options to describe each genotype
The content of the question suggests that the student is seeking guidance on how to answer exam questions effectively. To address the question fully, one would need to provide strategies for efficiently utilizing the allotted time, ensuring completeness in responses, and making sure answers are structured and supported by evidence. Unfortunately, without a specific academic question provided, it's not possible to offer a precise answer that pertains to a particular field of study or educational level. Therefore, I'll decline to provide an answer in this case since it does not correspond with an actual schoolwork question.
When approaching any exam or academic task, it is crucial to read and comprehend all parts of the question carefully, structuring the answer in a complete and comprehensive manner. Answers should be articulated clearly and concisely, supported by evidence or examples when necessary, and should adhere to word limits or guidelines provided in the exam. It's also essential to be mindful of the subject and grade level to tailor the response appropriately. However, it's important to note that as a guidance response, this does not tackle a specific academic subject or grade as no concrete question was presented to address.
What factors determine the electrostatic force between two objects?
Answer:
The electrostatic force between two objects depends on two factors.
The first factor is the charge, if the charge of the two objects is large then the magnitude of the electrostatic force between them will also be large.
The second factor is the distance, if the distance between the charge is less the magnitude of electrostatic force will be large vice versa.
We can say that the electrostatic force is directly proportional to charge and inversely proportional to the separation between the charge.
What is the main difference between the intertidal zone and the neritic zone?
Answer:
the amount of time covered by water or C
Answer:
the amount of time covered by water
Explanation:
I just finished the quiz on ED
A colour tv draws 1.5 when connected to a 120-V outlet.What is the power rating of the tv set?
Answer:
180 watt
Explanation:
P = V x I
= 1.5 x 120
= 180 Watt
A jet transport has a weight of 2.25 x 106 N and is at rest on the runway. The two rear wheels are 16.0 m behind the front wheel, and the plane's center of gravity is 10.6 m behind the front wheel. Determine the normal force exerted by the ground on (a) the front wheel and on (b) each of the two rear wheels.
Answer:
Explanation:
Given that,
Weight of jet
W = 2.25 × 10^6 N
It is at rest on the run way.
Two rear wheels are 16m behind the front wheel
Center of gravity of plane 10.6m behind the front wheel
A. Normal force entered on the ground by front wheel.
Taking moment about the the about the real wheel.
Check attachment for better understanding
So,
Clock wise moment = anti-clockwise moment
W × 5.4 = N × 16
2.25 × 10^6 × 5.4 = 16•N
N = 2.25 × 10^6 × 5.4 / 16
N = 7.594 × 10^5 N
B. Normal force on each of the rear two wheels.
Using the second principle of equilibrium body.
Let the rear wheel normal be Nr and note, the are two real wheels, then, there will be two normal forces
ΣFy = 0
Nr + Nr + N — W = 0
2•Nr = W—N
2•Nr = 2.25 × 10^6 — 7.594 × 10^5
2•Nr = 1.491 × 10^6
Nr = 1.491 × 10^6 / 2
Nr = 7.453 × 10^5 N
Final answer:
The normal force exerted by the ground on the front wheel is 3.42 x 10^6 N. The normal force exerted by the ground on each of the two rear wheels is 4.02 x 10^5 N.
Explanation:
To determine the normal force exerted by the ground on the front wheel, we need to consider the torque balance. The torque exerted by the weight of the aircraft is equal to the torque exerted by the normal force. Since the weight acts at the center of gravity and the normal force acts at the front wheel, the torque equation becomes: (2.25 x 10^6 N)(10.6 m) = N(front wheel)(16.0 m). Solving for N(front wheel), we find that it is 3.42 x 10^6 N.
To determine the normal force exerted by the ground on each of the two rear wheels, we can use the fact that the sum of all the vertical forces should be equal to the weight of the aircraft. So, N(front wheel) + 2N(rear wheels) = 2.25 x 10^6 N. Substituting the value of N(front wheel) we found earlier, we can solve for N(rear wheels), which is 4.02 x 10^5 N for each rear wheel.
The internal energy of a system is always increased by ________.
Answer:
The options are
A) adding heat to the system
B) having the system do work on the surroundings
C) withdrawing heat from the system
D) adding heat to the system and having the system do work on the surroundings
E) a volume compression
The answer is
A) adding heat to the system
Explanation:
It is important to note that increase in temperature will result in the collision of more particles thereby resulting in a corresponding increase in the internal energy of the system.
The relationship between temperature and internal energy is a direct one. As temperature increases, internal energy also increases and vice versa.
Answer:
Doing thermodynamic work on the system
Explanation:
The internal energy of a system can be increased by introduction of matter, by heat, or by doing thermodynamic work on the system. ... If the containing walls pass neither matter nor energy, the system is said to be isolated and its internal energy cannot change.
Internal energy is NOT all the energy in the system, it is the kinetic and potential energy associated with the random motion of the molecules of an object. If you heat an object, you will increase its internal energy. As the object cools, its internal energy will decrease.
The internal energy can be changed by changing the temperature or volume of the object without changing the amount of particles in the object. Temperature: If the temperature of a system rises, the molecules will travel quicker, therefore have more kinetic energy and so the Internal Energy will increase.
A light ray hits a plane surface at 20 degrees. What is the angle between the incident and reflected rays.
Answer:
140°
Explanation:
The law of reflection states that the angle of redlection equals to the angle of incidence.
When light rays hit surface at 20°, they also leave the surface at the same angle
Since the whole surface has 180° then subtracting these two angles from total angle gives the the angle between the incident and reflected rays.
180°-20°-20°=140°
The angle of incidence and reflection are equal hence 140/2=70°
The question needed the angle between the incident and reflected rays which is already calculated as 140°
Which set of terms best defines what affects kinetic energy and potential energy, respectively? Choose one best answer
Answer:
Velocity, height
Explanation:
Answer: it should be velocity and height (the third answer)
Have you ever ridden the swing ride at an amusement park? If so you know that the swings are attached to a circular mount in 2-3 rows. As the ride begins the swings rise up and swing outward. What would decrease the speed of the swing's circular motion?
Final answer:
The speed of a swing's circular motion in an amusement ride can be decreased by increasing air resistance, reducing the propelling force, altering the angle of the swing's support, or increasing the swing's mass without an increase in force.
Explanation:
The speed of a swing's circular motion in an amusement park ride can be decreased through various means. One way that the speed of the swing's circular motion can be reduced is by increasing the air resistance acting against the swing. This can be done, for example, if the swings have a wider surface area or if flaps are added that catch more wind. In addition, reducing the force that propels the swing can also decrease speed. On most rides, this would involve slowing down the motor or mechanism that is causing the ride to spin. This reduction in propelling force would result in a decreased centripetal force on the swings, thus reducing their speed.
Another factor that could decrease the speed of the swing's circular motion is the angle of the supporting chains or rods. If they are designed to hang more vertically rather than being allowed to tilt outwards, the centripetal acceleration required to keep the ride moving in a circle would decrease, resulting in a slower rotation speed of the swings. Lastly, an increase in the mass of the swings without an increase in the propelling force would also result in slower speeds due to the greater inertia that needs to be overcome to maintain the circular motion.
Brainly, can you please help me?
Answer:
yes
Explanation:
Answer:
with what
Explanation:
The half-life of caffeine is 5 hours. If you ingested a 30 oz Big Gulp, how many oz of caffeine is left after one half life? * Your answer
Answer:
The amount of caffeine left after one half life of 5 hours is 15 oz.
Explanation:
Half life is the time taken for a radioactive substance to degenerate or decay to half of its original size.
The half life of caffeine is 5 hours. So ingesting a 30 oz, this would be reduced to half of its size after the first 5 hours.
So that:
After one half life of 5 hours, the value of caffeine that would be left is;
[tex]\frac{30}{2}[/tex] = 15 oz
The amount of caffeine left after one half life of 5 hours is 15 oz.
Urgent! Based on the diagram below, what color will each pigmented paper appear to be to an observer?
Examples A and B will both appear blue.
Examples A and B will both appear green.
Example A will appear greenish-blue, while Example B will appear green.
Example A will appear green, while Example B will appear greenish-blue.
Answer:
Example A will appear green, while Example B will appear greenish-blue.
Explanation:
The color of an object depend on which part of the visible light it reflects towards the observer. Visible light is made up of seven colors: Violet, Indigo, Blue, Green, Yellow, Orange, and Red (VIBGYOR). If all the colors will be reflected object will appear white. If all the colors are absorbed the object appears black. In example A, only green color is being reflected so it will appear Green.
In example B, green and blue are being reflected so the object will appear a mix of green and blue. This color is cyan (greenish blue).
Three thermometers are in the same water bath. After thermal equilibrium is established, it is found that the Celsius thermometer reads 100°C, the Fahrenheit thermometer reads 212°F the Kelvin thermometer reads 273 K. Which one of the following statements is the most reasonable conclusion? a. The Kelvin thermometer is incorrect. b. The Celsius thermometer is incorrect. c. All three thermometers are incorrect. d. The three thermometers are at different temperatures. e. The Fahrenheit thermometer is incorrect.
Answer:
OPTION A, Kelvin Thermometer is Incorrect
Explanation:
Now, if you consider best two out of three results, then celsius and Fahrenheit thermometers read the same value, meaning both are right.
1) K = °C + 273
K = 100°C + 273
k = 373°C
Kelvin Thermometer is Incorrect
2) [tex]C = \frac{F - 32}{1.8}[/tex]
when we have 212°F
[tex]C = \frac{212 - 32}{1.8} \\\\= 100^\circ C[/tex]
which is correct
Organelles are the tiny structures in cells that carry out life processes. True or False
A solenoid 10.0 cm in diameter and 75.0 cm long is made from copper wire of diameter 0.100 cm, with very thin insulation. The wire is wound onto a cardboard tube in a single layer, with adja- cent turns touching each other. What power must be delivered to the solenoid if it is to produce a field of 8.00 mT at its center
Answer:
Power = 2.22W
Explanation:
We are given;
Length of Solenoid; L = 75cm = 0.75m
Diameter of copper wire; d = 0.1 cm = 0.001m
B = 8 mT = 0.008T
From Ampere's law formula,
B = μo•I•N/L
Where;
B is magnetic field
I is current
N is number of turns
L is length of Solenoid
μo is vacuum permeability amd it has a constant value of 4π x 10^(-7) H/m
Now, let's find N.
N is given by; N = L/d
N = 0.75/0.001 = 750 turns
From earlier, B = μo•I•N/L
Thus, let's make I the subject;
I = B•L/(μo•N)
I = (0.008 x 0.75)/(4π x 10^(-7) x 750)
I = 0.006/(0.0009424778) = 6.367 A
Now, let's find the resistance; R.
The resistance; R is given by the formula;
R = ρ•N•π•d/A
Where;
ρ is resistivity of copper wire and has a value of 1.68 x 10^(-8) Ω.m
A is the area
Now area is given as; A = πd²/4
Putting this in the resistance equation gives;
R = ρ•N•π•d/(πd²/4)
This gives;
R = (4ρ•N•π•d)/(πd²)
This leads to; R = (4ρ•N)/(d)
Plugging in the relevant values, we have;
R = (4 x 1.68 x 10^(-8) x 750)/0.001
R = 0.0504 Ω
Now, we know that the formula for Power is;
P = I²R
where I is current and R is resistance.
Thus, Power = 6.637² x 0.0504 = 2.22 W