How many nitrogen atoms are in one molecule of (NH4) 2SO4?

Which waves can u see

A torch bulb is rated 2.5V and 750mA. Calculate its power, its resistance and the energy consumed if this bulb lighted for 4 hours

When you encounter a yellow light as you approach an intersection what is the safest approach to take?

An object with a mass of 5kg is moving with an initial velocity of 20m/s. the object accelerates at a rate of 15m/s/s for 8s. what is the net force on the ball during acceleration?

How much time will elapse between seeing and hearing an event?

When a mass is placed on a spring with a spring constant of 15 newtons per meter, the spring is compressed 0.25 meter. How much elastic potential energy is stored in the spring?

Explain why we see the Milky Way as a faint band of light stretching across the sky.

A piece of plastic tape coated with iron oxide is magnet - ized more in some parts than in others. When the tape is moved past a small coil of wire, what happens in the coil? What is a practical application of this?

As earths plates move apart at some boundaries, they collide at others, forming

Potential energy that depends on height is called a. kinetic energy. b. gravitational potential energy. c. elastic potential energy. d. mechanical energy.