Dr. arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode. she measures the volume of the sound that occurs at the minimum pressure at which the explosion will occur. she then increases the pressure and measures the volume of the explosions that occur. what kind of investigation is the scientist conducting?

Diego is trying to lift a piano to the second floor of his house. diego uses a pulley system and gives a big lift to the piano.the piano moves upward, then stops, and then it starts to fall to the ground. which list best describes the forces on the piano in the proper order? positive force → balanced force → negative force negative force → balanced force → positive force positive force → unbalanced force → negative force negative force → unbalanced force → positive force

Every winter i fly home to chicago. it takes 3 hours. what is my average speed?

Acar starts from rest and accelerates along a straight line path in one minute. it finally attains a velocity of 40 meters/second. what is the car's average acceleration?