All Questions

The apparent change in observed frequency caused by relative motion between a wave source and an observer

A large-amplitude vibration produced when a system is driven near its natural frequency

A reflected sound heard separately from the original sound

Mass measures the amount of matter, while weight is the force of gravity acting on that mass

Gravity

A body suspended from a fixed point so that it can swing back and forth under gravity

Hydrometer

Thermometer

Barometer

The force per unit area exerted by the weight of the atmosphere

Proteins made by the immune system that recognize and bind specific foreign substances called antigens

A group of organisms that includes yeasts, molds and mushrooms