The correct answer is
A. The mechanical energy transforms to thermal energy as the pendulum slows and eventually stops moving.
In fact, we must keep in mind the presence of the air, which causes some resistance to the motion of the pendulum. As the pendulum moves through the air, part of its mechanical energy is transferred to the molecules of air because of the friction of this molecules with the surface of the pendulum. As a result, the pendulum slows down, and eventually stops. The initial energy of the pendulum has been converted into thermal energy of the molecules of air, which move faster now.
Answer: iron, nickel, and cobalt.
Explanation:
Answer:
2,800°F (1,538°C)
Explanation:
30g of iron will melt at the same temperature as 1g of iron.
Answer:
0.05
Explanation:
Given a variable C which is the product of two variables A, B:
Then the absolute error on C is given by:
where are the uncertanties on the measure of A, B and C, respectively.
In this problem, the horizontal component of the velocity is given by
Therefore, the uncertainty on vx is given by:
(1)
where we have:
, so
The uncertainty on is given by:
where:
and
So
Also,
So, combininb everything into (1), we find:
Answer:
Explanation:
Given
density of cork
density of water
L=Length of cylinder
If initially x length is under water
At equilibrium
After giving push
where a is acceleration of system
and
thus
thus
and