Which of the following is the most usable form of nitrogen to plants?

ammonia

nitrates

nitrous oxide

nitrogen gas

A cooling tower for a nuclear reactor is to be constructed in the shape of a hyperboloid of one sheet. The diameter at the base is 260 m and the minimum diameter, 500 m above the base, is 220 m. Find an equation for the tower.

The brakes of a car are applied to give it an acceleration of - 2m/s^2. The car comes to a stop in 3s. What was its speed when the brakes were applied?

You are riding your bike to the mall. You travel the first mile in 10 minutes. The last mile takes you 15 minutes. This is an example of

Ted swam 25 m east in a lake and then turned and swam 75 m west. His displacement was 50 m west. What distance did he swim? a. 75m b. 50 m c. 25m d. 100m

The student throws one cannonball directly upward at 5.0 m/s and simultaneously throws the other cannonball directly downward at 5.0 m/s. (this requires great dexterity, but the student has been practicing this maneuver for several months.

Which represents a system that is almost completely closed?

If many household substances classify as acids or bases what is the ph scale

A protostar forms once the nebular cloud condenses and the core begins

How do whales bats and dolphins use echolocation? A To scare away predators B To attract mates C To orient them selves and find food D To tell animals of there species where they are

How much force would be needed to move a car with the mass of 100kg to an acceleration of 5m/s/s?