Answer:
100 Watts
Explanation:
Power is work per time.
P = W / t
P = 200 J / 2 s
P = 100 W
Answer: 100 Watts
Explanation:
One charge is decreased to one-third of its original value,
and a second charge is decreased to one-half of its
original value.
How will the electrical force between the charges compare
with the original force?
o It will increase to six times the original force.
O It will increase to thirty-six times the original force.
It will decrease to one-sixth the original force.
It will decrease to one-thirty-sixth the original force.
Answer:
the Third option
Explanation:
Answer:
It will decrease to one-sixth the original force.
Explanation:
The electrical force is given by :
[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]..............(1)
Where
k is the electrostatic constant
r is the distance between charges
One charge is decreased to one-third of its original value, and a second charge is decreased to one-half of its original value.
i.e. [tex]q_1'=\dfrac{q_1}{3}[/tex]
and [tex]q_2'=\dfrac{q_2}{2}[/tex]
New force is given by :
[tex]F'=k\dfrac{q_1q_2}{6r^2}[/tex]
[tex]F'=\dfrac{F}{6}[/tex]
So, the new force will decrease to one-sixth the original force. Hence, the correct option is (c).
1. The following equation is derived from Newton's Second Law of Motion. A body of mass has a Force of 20 N/s and an acceleration of 50 m/s2. What's the mass of the object?
A. 0.8 kg
B. 0.5 kg
C. 0.4 kg
D. 1.5 kg
Newton's second law for an object's motion in one spatial dimension:
F = ma
F is the net force acting on the object, m is the object's mass, and a is the object's acceleration.
Given values:
F = 20N
a = 50m/s²
Plug in these values and solve for m:
20 = m(50)
m = 0.4kg
Choice C
Using Newton's Second Law of Motion, the mass of the object is calculated as 0.4 kg by dividing the force (20 N) by the acceleration (50 m/s²), corresponding to option C.
Explanation:The question is asking to determine the mass of the object based on the given force and acceleration using Newton's Second Law of Motion. According to Newton's Second Law, Force (F) equals mass (m) times acceleration (a), which is expressed as F = m * a. To find the mass, we rearrange the equation to m = F / a.
In this case, the force (F) is 20 Newtons (N), and the acceleration (a) is 50 meters per second squared (m/s²). Plugging these values into the equation, we get:
m = F / a = 20 N / 50 m/s² = 0.4 kg
Therefore, the mass of the object is 0.4 kg, which corresponds to option C.
Which of the following are examples of both projectile motion and 2-dimensional motion?
Answer:
A
is answer
because of questions
Answer:
D. A football thrown upward at an angle.
Explanation:
When an object is thrown in space, it is known as projectile and its motion is known as projectile motion. 1 dimensional motion refers to the motion either in horizontal or vertical direction. 2-dimensional motion refers to the motion in both horizontal and vertical direction. A football thrown at an angle will have constant horizontal velocity and accelerated motion in vertical direction. Thus, it is an example of projectile motion as well as two-dimensional motion.
Which statement is true about the ideal mechanical advantage of a third-class lever?
It is always equal to 1.
It is always greater than 1.
It is always less than 1.
It can be less than, greater than, or equal to 1.
Answer:
C
Explanation:
The mechanical advantage is always less than 1 because the force needed to move an object is always greater than the weight of the object.
Answer:
It is always less than 1.
Explanation:
The particles of a medium will settle the rest position after a mechanical wave passes
A. at
B. behind
C. In front of
After the mechanical waves passes by, the particles of the medium will settle right back at their rest position (A).
It doesn't matter whether the wave was a longitudinal or a transverse one.
Communicating results allows scientists to learn from each other's results.
True
False
True, scientists often talk to each other to figure out if their results were similar and what they could have done better.
Although, talking to other scientists does have risks, other scientists could copy your work and further better it.
So, your final answer is TRUE, sorry for the long answer, I needed to have a word count about 20 characters and then I got carried away! lol
For the following series circuit, compute the power in R1, R2, and R3 if the circuit values are E = 24 volts, R1 = 8, R2= 12, and R3 = 28. Power in R1 = watts Power in R2 = watts Power in R3 = watts Compute the total power delivered to the circuit by the 24-volt battery: watts
Answer:
Explanation:
You add resistances to get the total R in a series circuit.
R = R1 + R2 + R3
R = 8 + 12 + 28
R = 48 ohms.
Next the current is the same going through each of the resistors.
I = E / R
I = 24 / 48
I = 1/2
I = 0.5
But you are asked for power in each resistor
P = I * I*R
P = I^2 * R1
P1 = (0.5^2) * 8
P1 = 1/4 * 8 = 2 watts
P2 = I^2 * R2
P2 = (1/2)^2 * 12
P2 = 3 watts
P3 = 1/4 * 28
P3 = 7 watts.
=====================
The total power can be found two ways: either by just adding what you got or using voltage.
P = E * I
P = 24 * 1/2 = 12 watts.
Now we can try it the other way.
P = P1 + P2 + P3
P = 2 + 3 + 7
P = 12 watts
Both answers agree.
Answer:
Power in R1 = 2 watts
Power in R2 = 3 watts
Power in R3 = 7 watts
Compute the total power delivered to the circuit by the 24-volt battery: 12 watts
when two equal forces act on the same object in opposite directions, what is the net force?
Answer:
0
Explanation:
Forces with equal magnitudes and opposite directions cancel each other out, so the net force is 0.
Answer:
0
Explanation:
when you try to give two equal force on object in opposite side, the object will not move.hence the net force will be zero
mark me as brainliest please
Describe a situation in your everyday life where you could use the scientific method. List all the steps of the scientific method and explain how you would apply each of the steps in that situation.
Yes, scientific method can be applied on many everyday activities to get a reasonable solution. Infact normally we are applying this method without having it in our knowledge that we are applying it.
For example: In morning we are going to office and we start the car, but it is not started.You turn the engine again and again but it simply donot works.
Observation (the state of defining a problem):
The car is not started
Hypothesis (A possible solution based on the information we already know):
The car is not started because it might be out of gas or there can be some other technical fault.
Experiment (testing of hypothesis by applying different methods of solving problem):
You get the fuel and put it inside the car but it still donot works and car didnot start. Experiment didnot get solution.
Analyze the results of data and test another hypothesis
You call a technician and he check with the car engine tries and finds out that the engine was out of order and needs repairing.
Draw conclusion:
The engine do not works when it is out of order and it is a cause of a car not being started.
Now the theory and law making part can not be applied on this case but it is a part of scientific method.
Hope it helps!
if you break a magnet in two you get
Breaking a bar magnet in half results in two smaller magnets each with a north and south pole, illustrating that magnets always have two poles and magnetic 'monopoles' do not exist in isolation.
Explanation:If you break a bar magnet in half, the result is not a separation of magnetic poles, but rather the creation of two smaller magnets, each with its own north and south pole. This outcome underscores a fundamental principle of magnetism: magnets are always dipolar, meaning they have two poles. The behavior of magnets when broken can be traced to the atomic level, where even the tiniest particles that exhibit magnetism possess a north and south pole.
Unlike electric charges, which can exist in isolation, magnetic 'monopoles' have not been observed. Instead, the magnetic properties of materials like iron derive from the orientation of electrons' rotation, offering a microscopic explanation for why severing a magnet produces smaller dipoles rather than isolated poles.
what is the purpose of magnet in sonometer
Answer:
The step down transformer reduces this voltage to 6 volts. The string wire of the sonometer is a non-magnetic metallic wire like brass or copper. A horse shoe magnet is placed at the middle of the sonometer wire so that the magnetic field is applied perpendicular to the sonometer wire in a horizontal plane.
Hope this helps!
In a sonometer, the purpose of a magnet is to create a magnetic field that interacts with an electrically charged wire to induce vibrations and produce sound.
The purpose of a magnet in a sonometer is to provide a magnetic field which can interact with an electric current through a wire or a strip that is stretched across the sonometer. When alternating current flows through the wire, it oscillates due to the magnetic force exerted by the magnet. This magnetic interaction causes the wire to vibrate, producing sound waves whose frequencies are related to the tension, length, and mass per unit length of the wire.
Understanding the influence of geometric considerations and background contributions is critical for accurate measurements. A magnetometer with a second-order gradiometer design minimizes background noise and stray field effects, essential for precise studies. In this context, the sonometer can serve as a demonstrative tool for such magnetic field sensors.
20 points, please help asap!! Needs to be done by today/tonight!! So please help me!!
Describe the appearance of the moon and its position during each phase:
• New moon:
• Waxing crescent moon:
• First quarter moon:
• Gibbous moon:
• Full moon:
• Waning gibbous moon:
• Third quarter moon:
• Waning crescent moon:
Answer:
New Moon
The Moon's position in space at New Moon.
New Moon is the first primary phase and it occurs the moment when the Sun and Moon are aligned, with the Sun and Earth on opposite sides of the Moon.
A New Moon cannot normally be seen from Earth since only the dark side of the Moon faces our planet at this point. Sometimes, if the New Moon is close to the Lunar nodes of its path, it can cause a Solar Eclipse.
The greatest difference between high and low tide, also known as spring tides, takes place around New Moon and Full Moon.
Waxing Crescent Moon
The moment a thin sliver of the Moon becomes visible after New Moon is the beginning of the first intermediate phase, the Waxing Crescent Moon.
In the past, this used to be called New Moon while the darkest phase was called Dark Moon. This traditional definition of New Moon is still in use in some cultures, defining the beginning of the months for instance in the Islamic calendar.
The rest of the Moon is also sometimes faintly visible during most of this phase because Earth also reflects sunlight onto the Moon, a phenomenon called earthshine.
First Quarter Moon
First Quarter Moon is the second primary phase.
First Quarter Moon is the second primary Moon phase and it is defined as the moment the Moon has reached the first quarter of its orbit around Earth, hence the name. It is also called Half Moon as we can see exactly 50% of the Moon's surface illuminated. Whether you see the left or right half illuminated, depends on several factors, including your location.
The smallest difference between high and low tide, also known as neap tides, occurs around the 2 Quarter Moons.
Waxing Gibbous Moon
The second intermediate phase, the Waxing Gibbous Moon, lasts until the next primary phase. Waxing means that it is getting bigger. Gibbous refers to the shape, which is larger than the semicircle shape of the Moon at First Quarter, but smaller than a full circle.
Full Moon
Full Moon is the brightest phase.
@timeanddate.com
The Full Moon appears in the night sky when the Sun and the Moon are aligned on opposite sides of Earth.
How can Full Moon be in the daytime?
Technically, this alignment only lasts a moment. However, the Moon can appear to be full a day before or after while more than 98% of the Moon's disc is illuminated.
When a Full Moon occasionally passes through Earth's shadow, it will cause a lunar eclipse.
When the Full Moon comes close to the points of its orbit that are closest or farthest away from Earth, we call it a Supermoon or Micromoon, respectively.
What is the Moon Illusion?
Waning Gibbous Moon
The next intermediate Moon phase is the Waning Gibbous Moon. The portion of the visible half of the Moon illuminated decreases during this period.
Third Quarter Moon
Third Quarter Moon is the last primary phase.
The Third Quarter Moon occurs the moment the opposite half of the Moon is illuminated compared to the First Quarter Moon.
Waning Crescent Moon
The Waning Crescent Moon. The Sun illuminates less than half of the visible part of the Moon during this Moon phase and you can sometimes see earthshine on the rest of the Moon towards the end.
Explanation:
Answer:
The new Moon appears during a period when the earth, the Moon, and the Sun are all in a single line. Since the Moon is in between the Sun ad the Earth , the side of the Moon that directly facing the Earth is dark.
During full Moon, the three bodies are also approximately in a line, but the moon at this stage is on the other side of earth, so the Sun lights up the the section of the earth facing it.
At first quarter and last quarter, the Moon is located at a position perpendicular to a line between Earth and the Sun. one section of the moon is dark while the other will be brightened
Crescent refers to phases where the less than half of the moon is illuminated while gibbous is the phase where more than half of the moon is illuminated.
After the new Moon phase, The waxing crescent is visible due to exposure some reflected sunlight rays . The lunar crescent continue to grow until first-quarter Moon. As the right section of the Moon extend to more than half of the Moon's face, the Moon becomes waxing gibbous.
Then, right after the full Moon, the right section begins to reduce again to make a waning gibbous and which then turn into a third-quarter Moon. The exposure to sunlight continues to lessen until the moon is a waning crescent and then a new Moon. The full cycle is carried out in 29.5 days.
what is aerodynamics
Answer:
the branch of mechanics that deals with the motion of air and other gases and with the effects of such motion on bodies in the medium.Compare aerostatics(def 1).
Explanation:
Answer:
Aerodynamics is the way air moves around things.
A boat having a length 3m and breadth 2m is floating on a
lake. The boat sinks by 1cm when a man gets on it. The mass
of the man is:
Answer:
60 kg
Explanation:
The man's weight is equal to the weight of the water he displaces.
mg = ρVg
m = ρV
m = (1000 kg/m³) (3 m × 2 m × 0.01 m)
m = 60 kg
The man's mass is 60 kg.
If an object accelerates from rest, with a constant acceleration of 6.4 m/s2, what will
its velocity be after 18s?
Answer:
120 m/s
Explanation:
Acceleration = 6.4 m/s²
Initial velocity = 0 m/s
Time = 18 s
v = at + v₀
v = (6.4)(18) + 0
v = 115.2
Rounded to two significant figures, the final velocity is 120 m/s.
3. A beam of light emerges from water into air at an angle. The beam is bent
a. towards the normal
b. away from the normal.
c. 48 degrees upward.
d. 96 degrees upward.
Pls reply fast
We have that the beam of light that emerges from water into air at an angle that bends
Away from the normal
Option B is correct
Normal of a Plane
In geometry, a normal is an object such as a line, ray, or vector that is perpendicular to a given object. The normal line to a plane curve at a given point is the line perpendicular to the tangent line to the curve at the point.
Therefore it is seen From the Question Image that
The Beam is NOT bent
Towards the normal 48 degrees upward. 96 degrees upward.But Rather
Away from the normal.
In conclusion
The beam of light that emerges from water into air at an angle that bends
Away from the normal
Option B is correct
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A force of 7.50N is applied to a spring whose spring constant is 0.298N/cm N/cm. find its change in length
Answer:
25.2
Explanation:
F=KL
L=F/K
L=7.50/0.298
L=25.2M
The power in an electrical circuit is given by the equation P= PR, where /is
the current flowing through the circuit and Ris the resistance of the circuit.
What is the power in a circuit that has a current of 0.02 amps and a
resistance of 30 ohms?
A. 0.012 watts
B. 1500 watts
C. 18 watts
D. 0.6 watts
Answer:
A. 0.012 Watts
Explanation:
P = IV = I² R
Given I = 0.02 A and R = 30 Ω:
P = (0.02)² (30)
P = 0.012 W
The power in an electrical circuit is given by the equation P= PR, the power in the circuit is 0.6 watts. The correct option is D.
In physics and electrical circuits, power refers to the rate at which work is done or energy is conveyed. It quantifies the rate at which energy is used or generated in a system.
The power in an electrical circuit may be calculated using the equation P = I * R, where P is the power, I is the current flowing through the circuit, and R is the circuit's resistance.
The current (I) is 0.02 amps in this example, while the resistance (R) is 30 ohms.
P = I * V
P = 0.02 A * 30 Ω
P = 0.6 watts
Therefore, the power in the circuit is 0.6 watts.
Thus, the correct answer is D. 0.6 watts.
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If a vector 2ỉ +3j +8k is perpendicular to the
vector 4j-4i + ak, then the value of a is
Explanation:
if two vectors are perpendicular to each other then thier dot product is equal to zero so (2i+3j+8k).(-4i+4j+ak)=0 (2)(-4) +(3)(4)+(8)(a) =0 -8+12+8a=0 4+8a=0 8a=-4
[tex]a = \frac{ - 4}{8} [/tex]
[tex]a = \frac{ - 1}{2} [/tex]
give two mathematical examples of Newton's first law and the solutions
Explanation:
those are the examples
Which shows the correct order of steps during the formation of an ionic bond?
Ions are attracted to each other – Electrons are transferred – An ionic compound forms
An ionic compound forms - lons are attracted to each other - Electrons are transferred
Electrons are transferred – lons form - lons are attracted to each other
lons form - Electrons are transferred – Ions are attracted to each other
Answer: Electrons are transferred → Ions form → Ions are attracted to each other
Explanation:
Answer: Option (d) is the correct answer.
Explanation:
An ionic bond is defined as the bond that is formed by transfer of electron(s) from one atom to another.
For example, Lithium has atomic number 3 and first, it will form an ion by loosing an electron.
[tex]Li \rightarrow Li^{+} + 1e^{-}[/tex]
On the other hand, chlorine has atomic number 17 and it needs one electron to form a chlorine ion. So, it will gain an electron from lithium atom.
[tex]Cl + 1e^{-} \rightarrow Cl^{-}[/tex]
Therefore, these ions will then get attracted towards each other resulting in the formation of lithium chloride compound.
Thus, we can conclude that the correct order of steps during the formation of an ionic bond is ions form - Electrons are transferred – Ions are attracted to each other.
Which is a chemical change?
A. Splitting water into hydrogen and oxygen.
B. Breaking a block of solid ice into smaller pieces.
C. Freezing liquid water.
D. Boiling Water
Answer:
A. Splitting water into hydrogen and oxygen.
Explanation:
A chemical change produces a new substance. ... A physical change does not produce a new substance. Changes in state or phase (melting, freezing, vaporization, condensation, sublimation) are physical changes.
Splitting water into hydrogen and oxygen.
help me this question to solve
Answer:
1. 31 Ω
2. 42 Ω
3. V = IR
4. 4 A
5. 1.37 A
Explanation:
Sorry if I make any mistakes reading your handwriting. If I do, let me know and I'll fix it.
1. "Resistors of 5Ω, 10Ω, and 16Ω are connected in series. Find the total resistance."
The resistance of resistors in series is the sum:
R = R₁ + R₂ + R₃
R = 5Ω + 10Ω + 16Ω
R = 31Ω
2. "The total resistance of two resistors connected in series is 75Ω. The value of one resistor is 33Ω. What is the value of the other one?"
Since they are in series, the total resistance is the sum:
75Ω = 33Ω + R
R = 42Ω
3. "State Ohm's law."
Ohm's law states that a voltage drop across a resistor is equal to the resistance times the current.
V = IR
4. To find the current, we first find the total resistance, then use Ohm's law.
R = 10Ω + 15Ω + 30Ω
R = 55Ω
V = IR
220 V = I × 55Ω
I = 4 A
5. Same steps as before.
R = 1.5Ω + 4Ω + 12Ω
R = 17.5Ω
V = IR
24 V = I × 17.5Ω
I = 1.37 A
A 1.3 kg mass is attached to a spring with a force constant of 52 N/m. If the mass is released with a speed of 0.28m/s at a distance of 8.1 cm from the equilibrium position of the spring, what is its speed when it is halfway to the equilibrium position?
Answer:
0.52 m/s
Explanation:
Energy is conserved.
Initial kinetic energy + initial potential energy = final kinetic energy + final potential energy
½ m v₁² + ½ k x₁² = ½ m v₂² + ½ k x₂²
m v₁² + k x₁² = m v₂² + k x₂²
Given:
m = 1.3 kg
k = 52 N/m
v₁ = 0.28 m/s
x₁ = 0.081 m
x₂ = 0.081 m / 2 = 0.0405 m
(1.3) (0.28)² + (52) (0.081)² = (1.3) v² + (52) (0.0405)²
v = 0.52
The velocity halfway to the equilibrium position is 0.52 m/s.
Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? Check all that apply
Answer:
X-rays
Gamma rays
Explanation:
The electromagnetic waves are arranged in order of their frequencies and wavelengths. This arrangement forms the electromagnetic spectrum. The x-rays and gamma rays form the part of the spectrum with highest frequencies and least wavelength. In the order of decreasing frequency and increasing wavelength, we start with Gamma rays ,x-rays uv, Visible light, Infrared light,Microwave then radio waves.
Answer:
X rays and Gamma rays.
Explanation:
The electromagnetic waves are arranged in the increasing frequency and energy while decreasing wavelength. So the waves on the right side of ultraviolet spectrum having higher frequency and energy and lower wave length. such as X RAYS AND GAMMA RAYS. Electromagnetic wave spectrum is arranged as.
Radio waves, microwaves, infrared waves, visible rays, ultraviolet waves, x rays, gamma rays.
Energy does not have to involve motion. Question 11 options: True False
Match each word with its definition.
scalar
1. distance plus direction
speed
2. 30 m/s northwest, for example
average speed
3. total distance divided by total time
what an object going around a curve at a constant speed is
undergoing
acceleration
5. 30 m/s, for example
displacement
6. any non-directional quantity
velocity
1. distance plus direction
displacement
2. 30 m/s northwest, for example
velocity
3. total distance divided by total time
average speed
4. what an object going around a curve at a constant speed is
undergoing
acceleration
5. 30 m/s, for example
speed
6. any non-directional quantity
scalar
The given terms are matched with their respective definitions as follows,
The distance plus direction is known as displacement, 30 meters / second northwest is an example of the velocity, total distance divided by the total time then an object going around a curve at a constant speed is undergoing acceleration.
What is displacement?Displacement describes this shift in location.
1. distance plus direction ⇒⇒displacement
2. 30 m/s northwest, for example, ⇒⇒velocity
3. Total distance divided by the total time ⇒⇒average speed
4. An object going around a curve at a constant speed undergoing ⇒⇒acceleration
5. 30 m/s, for example, ⇒⇒speed
6. Any non-directional quantity ⇒⇒ scalar
Thus, An object traveling around a curve at a constant speed experiences acceleration. Distance plus direction is known as displacement, and 30 meters per second to the northwest is an example of velocity.
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Select the correct answer.
What do microwaves have in common with light waves?
O
Both are compression waves.
A.
B.
0
Both are longitudinal waves.
0
o
Both are electromagnetic waves.
0
Both are mechanical waves.
Reset
Answer:
Both are electromagnetic waves
Explanation:
Both microwaves and light waves form a part of the electromagnetic spectrum. Electromagnetic waves are produced as a result of oscillating magnetic and electric fields. when arranged in order of frequencies and wavelengths they form the electromagnetic spectrum.
2. A body is thrown vertically upward with a speed of 100 m/s.The time taken to be
the earth is
a. 10 sec
b. 20 sec
c. 15 sec
d. 5 sec
Answer:
b. 20 sec
Explanation:
y = y₀ + v₀ t + ½ g t²
0 = 0 + (100) t + ½ (-10) t²
0 = 100t − 5t²
0 = t (100 − 5t)
t = 0, t = 20
The body lands after 20 seconds.
Helpppppp
The star named Sirius has a declination of approximately -16°. In what direction is Sirius located from the celestial equator?
east
west
north
south
Negative celestial declinations are all positions in the sky that are directly over south surface latitudes.
Sirius is SOUTH of the celestial equator.
During the course of a year, it traces a circular path directly over the parallel of 16° South latitude, taking it over Peru, La Paz in Bolivia, St. Helena island in the Atlantic, Namibia, Angola, Zambia, Mozambique, Malawi, Madagascar, Australia, French Polynesia, American Samoa, and the Pacific Ocean.
Answer:
Sirius is *SOUTH* of the celestial equator :))
Explanation:
its the correct answer on the test,,, good luck !! :3