Answer:
Explanation:Hooke's law states that " if the elastic limit of an elastic material is not exceeded, the extension,e is directly proportional to the applied force or load.
Gravitational potential energy is associated with the shape or position of an object.
1.)When an object is placed at height h above ground, gravitational potential energy associated with it is given by,
P.E = mgh
2.)In projectile motion during upward motion, kinetic energy of object is converted into potential energy.
Answer and Explanation: <u>Centripetal</u> <u>Acceleration</u> is the change in velocity caused by a circular motion. It is calculated as:

v is linear speed
r is radius of the curve the object in traveling along
For its first lap:

After a while:


Comparing accelerations:




<u>With linear speed </u><u>4 times faster</u><u>, centripetal acceleration is </u><u>16 times greater.</u>
Answer:
The current would be 0.12A
Explanation:
Well, the formula for electric current is

where i is current, q is charge and t is time. Then we have to calculate the charge. If we know that the charge of a proton is
, then we calculate the charge of 1500 protons as it follows:

So the current for each square meter of Earth's surface is

Finally, knowing the surface of the Earth is 510065284702000
, we can calculate the total current 

If I had to guess the answer would be...
A student passing notes or drawing in class