Friction and air resistance are forces that always: 1.) Balance out, having no effect on the net force.

2.) Act in the opposite direction to an object's motion, tending to slow it down.

3.) Pull objects down towards the center of the Earth.

4.) Cause objects to speed up.

How do hydroponic plants differ from nonhydroponic plants? a.) hydroponic plants can grow in a dryer soil. nonhydroponic plants grow in moist soil. b.) hydroponic plants grow on other plants and are known as air plants. nonhydroponic plants do not grow on other plants. c.) hydroponic plants can only grow in rain forests. nonhydroponic plants cannot grow in rain forests. d.) hydroponic plants are grown without soil. nonhydroponic plants are grown in soil.

What is the relationship between the wavelength of a wave and it's energy?

Which are examples of projectile motion? choose all that apply a. a soccer ball rolling across the ground in the northeast direction b. a car turning a corner, so it is heading south c. a javelin flying through the air d. a tennis ball lobbed over the net