What is an effect of an object getting wet?
1 answer:
You might be interested in
a) Density at 100 degrees:
Explanation:
The density of mercury at 0 degrees is
Let's take 1 kg of mercury. Its volume at 0 degrees is
The formula to calculate the volumetric expansion of the mercury is:
where
is the cubic expansivity of mercury
V is the initial volume
is the increase in temperature
In this part of the problem,
So, the expansion is
So, the new density is
b) Density at 22 degrees:
We can apply the same formula we used before, the only difference here is that the increase in temperature is
And the volumetric expansion is
So, the new density is
Answer:
<h2>1) There is no work done by the machine because</h2><h2>B) The object has not moved</h2><h2>2) There is no work done by the prisoner because</h2><h2>D) The prisoner does no work because the wall goes no distance</h2><h2>3) The kinetic energy when it is half the way down is</h2><h2>6.0 J</h2>Explanation:
1) As we know that the work done is the product of force and displacement
It is given as
so if the object is not displaced due to the force exerted by the object then the work done by the object must be ZERO
so correct answer is
B) The object has not moved
2) As we know that the work done is the product of force and displacement
It is given as
As we know that the wall is not displaced due to applied force so here work done by the prisoner must be zero
D) The prisoner does no work because the wall goes no distance
3) As we know by work energy theorem that work done by all forces is equal to change in its kinetic energy
So we will have
so we will have
now when cart moves half the distance then again using the same