What is the purpose of repeating a measurement using a different method?

A sprinter runs 500 meters west in a straight line and then turns around and runs in the same straight line 300 meters east. What is the runner's displacement?

With an average acceleration of - 1.3 m/s2, how long will it take a cyclist to bring a bicycle with an initial speed of 13.0 m/s to a complete stop? Answer in units of s.

What it's the speed of light in a vacuum in mi/s?

What is the speed of sound in feet per second?

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.

Describe the rise and fall of a basketball using the concepts of kinetic energy and potential energy

What is not a factor that affects the viscosity of magma?

While driving his 600-kg ultra-compact electric car, a distracted driver starts crossing a drawbridge. Not realizing that the drawbridge is about to open, he ends up in the river below with his car.

A police officer's radar gun emits radio waves at a frequency of 10.7 GHz10.7 GHz. What is the difference in the frequencies reflected back to the radar gun by a car traveling at the 75 mph75 mph speed limit and a car travelling 9 mph9 mph faster?

Function of a battery