Rubber is unusual in that it shrinks or contracts when heated. Warming a rubber ball will -

A. decrease its density.

B. cause its volume to remain the same.

C. increase its density.

D. decrease its mass.

1) what is a calorie?

A proton is placed in an electric field of intensity 700 n/ c. what is the magnitude and direction of the acceleration of this proton due to this field?

A copper wire has a diameter of 1.02mm and carries a constant current of 1.67A. If the density of free electrons in copper is 8.5 x10 to the power 28 per meter cube. calculate the current density and drift velocity of the electrons

What type of energy does a spinning turbine have? a. electrical energy b. nuclear energy c. thermal energy d. mechanical energy

A car speeds up as it rolls down a hill. which is this an example of? positive acceleration negative acceleration relative velocity

How many DNA strands could you fit into a milimeter

A screwdriver with a 1-cm shaft and a 4-cm handle is used to tighten a screw. calculate the ideal mechanical advantage.

Plants make food through photosynthesis, a chemical reaction. What are the starting substances of the reaction?

How long will it take to travel 200,000 m traveling 100 m/s?

How does the planet Venus look to a person standing on the Earth? A. Venus looks like a small moon. B. Venus is bright like the Sun. C. Venus looks like a star. D. Venus cannot be seen from Earth.