Nigtrogen and hydrogen combine to produce ammonia.

N2+H2? NH3

Which set of coefficients balances the equation?

A) 1,1,1

B) 1,1,2

C) 1,3,2

D) 2,3,2

Select the correct answer. What did Galileo discover when he dropped two cannon balls of different weights from the Leaning Tower of Pisa? A. The force acting on both of the balls was the same. B.

Which statement accurately describes what happens when ice melts in terms of energy

This is found by multiplying pi by the radius squared.

Which endocrine gland is responsible for controlling the stress response?

A 20-N force acts on an object with a mass of 2.0kg. what is the objects acceleration?

A ball rolls down an incline and off a horizontal ramp. Ignoring air resistance, what force or forces act on the ball as it moves through the air just after leaving the horizontal ramp? a). The weight of the ball acting vertically down.

How many atoms are in a sample of 1.83 moles of potassium (K) atoms? A) 3.04 * 10-24 atoms K B) 3.29 * 1023 atoms K C) 1.10 * 1024 atoms K D) 6.02 * 1023 atoms K

If a single mutation turns off the growth of some pairs of legs within an organism, what's most likely affected? a. A substituted gene b. A deleted gene c. A duplicated gene d. A Hox gene

car slows down from 20 m/s to rest in a distance of 85 m. What was its acceleration, assumed constant?

On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 kg/m3, length 78.4 cm and diameter 2.30 cm from a storage room to a machinist. Calculate the weight of the rod, w. Assume the free-fall acceleration is g