What three things happen when air is warmed?

a) it expands

b) it contracts

c) it becomes lighter

d) it becomes heavier

e) it rises

f) it sinks

How does activity on the Sun affect natural phenomena on Earth?

Drag the tiles to the correct boxes to complete the pairs. Match the pollution type to its effect. air pollution water pollution light pollution land pollution contaminated soil smog sky glow eutrophication

using hook's law, F spring = k triangle x, find the distance a spring with an elastic constant of 4 N/cm will stretch if a 2 newton force is applied to it.

Which three statements about electric magnetic radiation are true

A bowling ball has a mass of 6 kg what happens to its momentum when its speed increases from 2 m/s to 4 m/s

What is the median of 5 12 7 15 3 6 1

If you double the velocity of an object, you increase its kinetic energy by a factor of what?

2. Modern aircraft carriers use a steam powered catapult system to launch jets from a very short range. These catapults can provide a constant acceleration to bring jets up to speed in only two seconds.

Which of these best describes a situation where science is used? A. choosing a career after graduation B. brushing teeth after having dinner C. ordering food in a restaurant by looking at a menu card D.

A receiver is in a jet flying alongside another jet that is emitting 2.0 x 106 Hz radio waves. If the jets fly at 268 m/s, what is the change in frequency detected at the receiver?