Which of the following is a greenhouse gas?

Oxygen

Hydrogen

Nitrogen

Water vapor

What is the advantage of adding more pulleys to a system of pulleys?

Where are warm air vents usually located in a forced air heating system

Which is a possible measurement of the momentum of a moving object? 11 kg∙m2/s2 2.8 kg∙m/s 16 kg∙m/s, due west 9.3 m/s2, due north

1. Most waves are caused by vibrations. What motion in a transmitting antenna causes the vibrations that produce radio waves? 2. Name two common household appliances that produce electromagnetic waves other than radio waves.

The combination of sperm, sugars, chemicals, and mucus is: a. semen b. urine C. spermatozoa d. all of the above

The starship enterprise returns from warp drive to ordinary space with a forward speed of 50 km/s. to the crew's great sur - prise, a klingon ship is 100 km directly ahead, traveling in the same direction at a mere 20 km/s.

What do you use to measure potential difference

A force F = 94.9 N acts at an angle α = 35◦ with respect to the horizontal on a block of mass m = 29.3 kg, which is at rest on a horizontal plane. The acceleration of gravity is 9.81 m/s 2. If the static frictional coefficient is µs = 0.

Which statements about eclipses are true? Check all that apply. Earth's shadow creates a solar eclipse. A total lunar eclipse has a reddish color. The moon moves between Earth and the Sun during a solar eclipse.

Who would use more energy in a day - someone who plays a lot of sport or someone who plays a lot of computer games