If the efficiency and mechanical advantage of a certain machine are given as 65 % and 3 respectively. What is the velocity ratio of the machine? a.3.5 %
b.4.6 %
c.7.9 %
d.11.2 %

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

What are the factors that affect the resistance of a wire?

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?