Select all of the answers that apply. The greenhouse effect is very important to daily life on earth. Which of the following are gases that are known as greenhouse gases?

carbon monoxide

carbon dioxide

nitrous oxide

oxygen

methane

ozone

If the Earthwere twice as massive as it is now, then the gravitational force between it andthe Sun would be

Two electrodes, separated by a distance d, in a vacuum are maintained at a constant potential difference. An electron, accelerated from one electrode to the other, gains kinetic energy Ek. The distance between the electrodes is now changed to d.

If alex has mass of 60 kg on Earth, what is his mass on the moon?

Which of the following tools can be used to determine humidity? Select all that apply

Which of the following equations describes Newton's second law A. M=Fa B. F=m/a C. M=F/a D. F = a/m

What happens to the movement of particles in a liquid when it is heated?

During a demonstration of the gravitational force on falling objects to her class, Sarah drops an 11 lb. bowling ball from the top of the science building. Determine distance the ball has traveled after falling for 1.

A teacher wants to demonstrate that unheated water can boil at room temperature in a beaker within a bell jar connected to a vac-uum pump. However, the vacuum pump is faulty and can reduce pressures only to 15 kPa.

How many btus of heat energy are needed to raise the temperature of 99.6 lbs of water from 50 °f to 130 °f?

What is a different form of a characteristic, such as brown hair, is called