What is the difference b/w work done and potential Energy ? Explain plz

1 answer:

7 0

Suppose you drive your car to the store and back. Your car started and finished in the same place (on your drive) so its potential energy hasn't changed but during the trip the car engine did a lot of work. This is an example where the work done is not equal to the change in potential energy.

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The inner and outer surfaces of a 5m x 6m brick wall of thickness 30 cm and thermal conductivity 0.69 w/m.0 c are maintained at

Volgvan

The working equation to be used here is written below:

Q = kA(T₁ - T₂)/Δx
where
Q is the rate of heat transfer
k is the heat transfer coefficient
A is the cross-sectional area of the wall
T₁ - T₂ is the temperature difference between the sides of the wall
Δx is the thickness of the wall

The solution is as follows:

Q = (0.69 W/m²·°C)(5 m × 6 m)(50°C - 20°C)/(30 cm * 1 m/100 cm)
Q = 2,070 W/m

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4. A chandelier brightens a ballroom after a waiter moves a switch

Leokris [45]

Answer:

because switch moves after a waiter

Explanation:

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3 years ago

John pushes his bed to the left overcoming the force of friction. On the free-body diagram below, which force represents the fri

mamaluj [8]

Answer:

<em>Force B</em>

Explanation:

<u>Friction Force </u>

It's a force that appears when an object is tried to move on a rough surface. There are two cases: when the object is at rest, we have the friction static coefficient and when the object is already moving, we have the dynamic coefficient. The static coefficient is usually greater than the second because it's harder to overcome the friction when the object is at rest.

We are told that John pushes the bed to the left with enough force to overcome the force of friction. If the movement is intended to be to the left side, the friction force appears to the right, since it always opposes to the movement. Thus the force B is the one who represents the friction force in this situation

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4 years ago

Read 2 more answers

FORMULA PLEASE AND explINATION

Alex_Xolod [135]

2 Newtons to the right.

3 newtons are needed to over come the friction. There are 2 left over.

So the answer is 2 newtons to the right.

5 - 3 = 2

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3 years ago

SQUA is a square. If side SQ has endpoints S(-2,8) and Q(4,10), find the perimeter to two decimal places?