PHYSICS HIGH SCHOOL

What is the relation between Kilowatt-hour and joule ?

Answers

Answer 1

Answer:

Answer: The relationship between " kWh " and " Joules " are :

1 kWh=1000 Watt×[60×60] seconds

1 kWh=10

W×3600 s

1 kWh=3.6×10

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What is the potential energy of a 30 Newton ball that is on the ground

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The potential energy of a 30N ball on the ground will be zero. With respect to height, h. Potential energy will be calculated like this. P=mgh. So if its on the ground relatively speaking the h=0. Thus inputting into the above formula. P=0.

Who speaks the line "Lord, what fools these mortals be"? A. Oberon
B. Cobweb
C. Mustardseed
D. Puck

Answers

The answer is D.Puck.

♡♡Hope I helped!!! :)♡♡

Point m is located a distance 2d from the midpoint between the two wires. find the magnitude of the magnetic field b1m created at point m by wire 1.

Answers

Note: The diagram referred to in the question is attached here as a file.

Answer:

The magnitude of the magnetic field is $B = (0.071 \mu I)/(d)$

Explanation:

The magnetic field can be determined by the relationship:

$B = (\mu I)/(2\pi R)$ ...............(1)

Were I is the current flowing through the wires

The distance R from point 1 to m is calculated using the pythagora's theorem

$R = \sqrt{d^(2) + (2d)^(2) }$

$R = \sqrt{5d^(2) } \nR = d√(5)$

Substituting R into equation (1)

$B = (\mu I)/(2\pi d√(5) )$

$B = (0.071 \mu I)/(d)$

Use the formula for the magnetic field created by a long, straight, current-carrying wire (B = μ0I/2π(2d)) to find the magnitude of the magnetic field at point M created by wire 1

To find the magnitude of the magnetic field B1m created at point M by wire 1, we can use the Biot-Savart law. The formula for the magnetic field produced by a straight wire at a distance r from the wire is given by:

B = (μ₀ * I) / (2π * r)

Where:

- B is the magnetic field.

- μ₀ is the permeability of free space, which is a constant approximately equal to 4π x $10^{(-7)$ T·m/A.

- I is the current flowing through the wire.

- r is the distance from the wire to the point where you want to calculate the magnetic field.

In your case, the distance from wire 1 to point M is 2d. Therefore, we can calculate the magnetic field B1m due to wire 1 at point M as follows:

B1m = (μ₀ * I1) / (2π * (2d))

Now, we need to consider the direction of the magnetic field. Since point M is located equidistant between two wires, and wire 1 is closer to point M, the magnetic field created by wire 1 at point M will point towards or away from the wire, depending on the direction of the current in wire 1.

If the current in wire 1 is in the same direction as the vector from wire 1 to point M, the magnetic field will point away from wire 1. If the current in wire 1 is in the opposite direction, the magnetic field will point towards wire 1.

In both cases, the magnitude of the magnetic field B1m due to wire 1 at point M is given by the formula mentioned earlier:

B1m = (μ₀ * I1) / (2π * (2d))

This formula gives you the magnitude of the magnetic field at point M due to wire 1. The direction of the field depends on the direction of the current in wire 1 relative to the vector from wire 1 to point M.

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Can you think of a scenario when the kinetic and gravitational potential energy could both be zero ? Describe or draw how this could be possible below

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Both kinetic and gravitational potential energy can become zero at infinite distance from the Earth.

Consider an object of mass m projected from the surface of the Earth with a velocity v.

The total energy of the body on the surface of the Earth is the sum of its kinetic energy $(1)/(2) mv^2$ and gravitational potential energy $-(GMm)/(R^2)$ .

here, M is the mass of the Earth, R is the radius of Earth and G is the universal gravitational constant.

The gravitational potential energy of the object is negative since it is in an attractive field, which is the gravitational field of the Earth.

The energy of the object on the surface of the earth is given by,

$E_i=(1)/(2) mv^2-(GMm)/(R^2)$

As the object rises upwards, it experiences deceleration due to the gravitational force of the Earth. Its velocity decreases and hence its kinetic energy decreases.

The decrease in kinetic energy is manifested as an equal increase in potential energy. The potential energy becomes less and less negative as more and more kinetic energy is converted into potential energy.

At a height h from the surface of the Earth, the energy of the object is given by,

$E_h=(1)/(2) mv_h^2-(GMm)/((R+h)^2)$

The velocity $v_h$ is less than v.

When h =∞, the gravitational potential energy increases from a negative value to zero.

If the velocity of projection is adjusted in such a manner that the velocity decreases to zero at infinite distance from the earth, the object's kinetic energy also becomes equal to zero.

Thus, it is possible for both kinetic and potential energies to be zero at infinite distance from the Earth. In this case, kinetic energy decreases from a positive value to zero and the gravitational potential energy increases from a negative value to zero.

Which statement is correct? a) 1 in. = 2.54 cm b) 7 in. = 17.68 cm c) 1 ft = 12 in. d) 74 in. = 1 yd

Answers

Answer:

a) 1 in. = 2.54 cm

Explanation:

Final answer:

The correct statement is a) 1 in. = 2.54 cm. To convert inches to centimeters, multiply the number of inches by the conversion factor 2.54 cm/1 in.

Explanation:

The correct statement is a) 1 in. = 2.54 cm.

To convert inches to centimeters, you can multiply the number of inches by the conversion factor 2.54 cm/1 in. For example, if you want to convert 7 inches to centimeters, you would multiply 7 in. by 2.54 cm/1 in. This gives you 17.78 cm, which is approximately equal to 17.68 cm (as stated in option b).

Option c) 1 ft = 12 in. and option d) 74 in. = 1 yd are also correct statements, but they are not directly related to the conversion between inches and centimeters.

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Is it ok for some help pwease?What is the area of calm winds near the equator called?

doldrums

polar easterlies

trade winds

horse latitudes

Answers

Answer:

doldrums

Explanation:

Just need to type something more to be able to post

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