Find the weight of a 15kg rock acceleration due to gravity is 9.8 m/s2

A. 5.2 N

B. 15 N

C. 147 N

D. 1.53 N

A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 21.5 m/s, and the distance between them is 52.0 m. After t1 = 4.

Describe two ways to change the frictional force between two solid surfaces.

Julian rides his bike uphill for 45 minutes, then turns around and rides back downhill. It takes him 15 minutes to get back to where he started. His uphill speed is 3 miles per hour slower than his downhill speed.

Engineers refer to any loose material on the surface of the Earth as soil. How does this differ from the definition used in Earth sciences?

A fan blade rotates with angular velocity given by ωz (t) = γ - β t2. part a calculate the angular acceleration as a function of time. express your answer in terms of the variables β, γ, and t. αz (t) = submitmy answersgive up part b if γ = 5.

An air mass that forms over Arizona and New Mexico will be?

Which medium below conducts sound the fastest? A. a wall B. Steel C. Plastic D. Cardboard

Fariza wears a red hat in her school play. On stage, she is lit by a spotlight shining only green light. When our eyes receive no light from an object, it looks black. Explain why Fariza's hat looks black on stage.

In a chemical reaction, one element replaces another element in a compound to form a new substance. Which of the following best describes this type of chemical reaction? Combustion Neutralization Double Replacement Single Replacement

If the Earth's crust contained twice as much iron as it does, would atmospheric oxygen buildup have been slowed down or sped up during the past 2.