What is the mass of a falling rock if it hits the ground with a force of 147 newtons?

If an object traveling in one direction has s positive velocity, what kind of velocity would the same object traveling in the opposite direction have?

Is natural sunlight polarized or unpolarized?

Which variable is changed in an experiment? A. The Stable Variable B. The Graphing Variable C. The Independent Variable D. The Dependent Variable

Physical Properties include ... A. taste, odor, and is corrosive B. taste, texture, and forms hydrogen gas. C. taste, odor, and texture D. texture, odor, and is corrosive

Why does a mirror fog up after a hot shower

Which of the following is not shorthand to describe one of the three types of ecological relationships? +/+ -/+ +/0 -/0

Which is a characteristic of an electromagnetic wave?

What does the ozone layer absorb? a. Microwaves c. UV radiation b. X-rays d. Infra-red radiation

An object is undergoing shm with period 0.900 s and amplitude 0.320 m. at t = 0 the object is at x = 0.320 m and is instantaneously at rest. calculate the time it takes the object to go (a) from x = 0.320 m to x = 0.160 m and (b) from x = 0.

Your friend states in a report that the average time required to circle a 1.0-mi track was 49.325 s. This was measured by timing 10 laps using a stopwatch with a precision of 0.01 s. Do you believe his results are reliable? Explain.