Ahiker wears a 7.5 kg backpack while climbing a mountain. after 30 mins thw hiker is 8.2 m above the starting point. what is the average amount of power created by the hiker?

Atransverse wave is traveling on a string stretched along the horizontal x-axis. the equation for the vertical displacement y of the string is given by y = (1.8 x 10-3)cos[π(13x - 60t)], where all quantities are in si units. what is the maximum speed of a particle of the string

When a neutral charge, comes into contact with a positive charge they repel each other nothing happens the neutral charge becomes negative they attract each other

In physics the desire of an object to keep doing what it is doing is termed?