If the archer applies 10 M of force onto the bow to pull it back, what is the speed of the arrow if it travels 50 m in 2.5 seconds?

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

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

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?