The speed of light in a material is What is the critical angle of a light ray at the interface between the material and a vacuum? a. 17°
b. 22°
c. 24°
d. 19°

Which of the following represents an upside-down image? o a. +doo b. -doo c. +mo d.-m

For a particular reaction, ? h = -144.6 kj and ? s = -301.2 j/k. calculate ? g for this reaction at 298 k.

Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s