An electric heater is rated 1000watts. If a current of 5A pass through the heater, find the value of its resistance.

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.