How many layers of material were the roads made of?

a. two

c. four

b. three

d. five

A bowling ball (mass = 7.2 kg, radius = 0.11 m) and a billiard ball (mass = 0.38 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?

A marshmallow is dropped from a 5.71 meter high pedestrian bridge, and 0.921 seconds later, it lands right on the head of an unsuspecting person walking underneath. How tall is the person with the marshmallow on her head? a: 1.75 m b: 1.70 m c: 1.

A railroad car with a mass of 30,000 kg is moving at 2.0 m/s when it runs into an at-rest freight car with an equal mass. the cara lock together. what is their final velocity? A. 2.0 m/s B. 0.5 m/s C. 60,000 kg-m/s D. 1.0 m/s

Jim stands beside a wide river and wonders how wide it is. he spots a large rock on the bank directly across from him.

Why do you think the chemical reactions lab we did is typically called a "copper plating lab"? a. Because the acid solution cleaned the pennies and made the copper look shinier. b.

Aerogenerators are used to produce electricity from

Explain why science is a continuous progression of study

If your at the mall with your friends and they shoplift what would you do

Fluid is leaking from an axle seal. Technician A says to remove the wheel and check for incorrectly installed brake components. Technician B says to check for obstructions at the differential breather.

All matter we encounter in everyday life exists in one of three physical formss True or False.