What is the temperature of air if the speed of sound is 295m/s?

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

In science and physics what is the standard unit of measure for speed?

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