Suppose a piano tuner hears 3 beats per second when listening to the combined sound from his tuning fork and the piano note being tuned. After slightly tightening the string, he hears 5 beats per second. Should the string be loosened or tightened?

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

If the area of a square has increased by a factor of 16, by how much has each side increased?

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?