Suppose that 2 j of work are needed to stretch a spring from its natural length of 30 cm to a length of 42 cm. how much work (in j) is needed to stretch it from 35 cm to 40 cm?

How can you use a clock to find a time interval? and what is time interval?

What happens as the moon moves through earth's shadow

Which change decreases the resistance of a piece of copper wire

A nuclear particle with no charge

The planet Venus, our moon, and Halley's Comet all A.) Are larger than the earth B.) are composed of primarily hydrogen. C.) change speed dramatically as they orbit. D.) have highly predictable orbits around the sun.

One disadvantage of this type of power is that it still pollutes the air. biomass geothermal power hydropower solar power You want to create a new warming appliance that is safe.

A small rock remains at rest in outer space while an astronaut pushes horizontally on it with a force of 20 N. Which of the following must be true? A. There is another horizontal force acting on the rock. B.

If an igneous rock has very large crystals of minerals that you can see when looking at it, which type of igneous rock is it

You have a 60-foot roll of fencing and a large field. You want to make two paddocks by continuing the fencing down the middle of a rectangular enclosure. What are the dimensions of the largest such enclosure you can make?

Crystallization is a separation technique used to produce rock candy from a sugar solution. true or false