If a steam engine does 500 J of useful work, how much work is needed to be put in if the efficiency rating of 20%? Use your triangle,

Why should seat belts not be mandatory quick plz

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus

This punnett square shows the cross between two pants. one parent has round seeds (rr). and the other parent has wrinkled seeds (rr) which best describes their offspring as shown in this cross?