Which statement is correct? select one:
a. light, in a vacuum, travels at the same speed even if the light source is moving. b. light given off from a moving source will travel faster in a vacuum.
c. light given off from a moving source will travel faster in air.
d. light, in a vacuum, travels slower if the light source is moving.

The velocity of car is 80.0 miles per hour. what is the velocity of car in meters per second? (1 km -0.621 miles) m/s

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer

Which two particles are found in the center of an atom