The correct answer is <em>"Thermal".</em>
When the cannonball is shot upwards, kinetic energy converts to gravitational potential energy (GPE).
As the ball rises, speed decreases and height increases.
So when the cannonball has reached its maximum height, all of the Kinetic energy has transferred into gravitational potential energy.
(Because at the max height, the cannonball for a brief moment has no velocity, and thus no kinetic energy)
So the GPE is 48279 Joules at it's maximum height.
All I know is that the more proton and electrons an atom has the less metallic it becomes. But other than that I think it's pretty random
The north and south poles of a magnetic field produced by an electromagnet will switch when the direction of the Current changes.
Answer:
v = 3.78 m/s
Explanation:
given,
mass of the child = 36 Kg
length of the chain, r = 2.9 m
tension in each chain, T = 265 N
now,
Net force acting in the system
2 T - m g = m a
T is the tension in the chain
a is the acceleration in the normal direction
here, 
now,


v² = 14.274
v = 3.78 m/s
speed of the child at the lowest point is equal to 3.78 m/s