Energy conservation means

a. slowing down a chemical change.

b. burning a fuel to release energy.

c. using fossil fuels to produce electricity.

d. reducing energy use.

What is air resistance?

A plane heads due north at an airspeed of 180 km/h. the wind is blowing from the west at 60km/h. what is the planeâs velocity with respect to the ground? a190 km/h b480 km/h c240 km/h d120 km/h

Heather and Jerry are standing on a bridge 51 m above a river. Heather throws a rock straight down with a speed of 17 m/s. Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Ignore air resistance.

A tennis ball is served horizontally from 2.4m above the ground at 30m/s a) the net is 12m away and 0.9m high ... Will be ball clear the net? b) where will the ball land ... ?

What are three features that result from deposition along a river?

What is the importance of the ozone layer?

Which of the following is an example of plasma?

What do you need to make 100 minutes charges neutral

The equation e = mc2 relates mass and a. energy b. force c. work d. gravity

What should a scientist do to use scientific methods for determining the relative age of Earth's rocks? A be biased in opinion B disregard views of others C use creative ideas D prove that methods are non-testable