76. What is the formula for pressure?
a) P = Fd
b) P = QV
c) P = mgh
d) P = F/A
Answer: d) P = F/A
77. Which type of energy is produced by the movement of molecules in a substance?
a) Electrical energy
b) Nuclear energy
c) Thermal energy
d) Chemical energy
Answer: c) Thermal energy
78. What is the process by which a liquid turns into a solid?
a) Vaporization
b) Sublimation
c) Melting
d) Freezing
Answer: d) Freezing
79. What is the formula for force?
a) F = md
b) F = QV
c) F = mgh
d) F = ma
Answer: d) F = ma
80. Which type of electromagnetic radiation has the highest energy?
a) Infrared radiation
b) X-rays
c) Gamma rays
d) Ultraviolet radiation
Answer: c) Gamma rays
