Which of the following would increase friction?

A. Motor oil

B. Soap

C. Sand

D. Water

A hammer is dropped from the roof of a building 1000 meters tall. How long will it take to hit the ground?

A 4.2-m-diameter merry-go-round is rotating freely with an angularvelocity of 0.80 rad/s. Its total moment of inertia is1760kgm2. Four people standing on the ground, eachof mass 65 kg, suddenly step onto the edge of themerry-go-round. a.

Give 3 reasons scientist support the theory of tectonic plates

The pressure of a gas is 15 atm in a 5L cylinder. If the volume of the cylinder is depressed to 3L, What is the new pressure exerted by the gas?

Suppose two stars are located in region a of the h-r diagram shown in the figure below. Star X appears much dimmer that Star Y as seen from Earth. Which Star can be inferred to be nearer to Earth, and how do you know?

A wave is a (blank) that carries (blank) from one place to another

The movement of thermal energy from hot to cold materials is called

A jar contains 30 ml of glycerin and 60 ml of corn syrup which liquid is on the top layer

What are optical fibres

Where in the body does neutral, acidic and basic (alkaline) solutions usually exist?