In science what is the requirement of doing work?

Dan bikes 10 km west and then bikes another 5 km west. What is dans velocity if it takes 45 minutes

20) If there was no gravity, what would happen to a moving object? Which law is this? 21) What factors are included in gravity

It takes a car five seconds to speed up from 20 m/s to 23 m/s. what is the acceleration of the car?

An electron with a charge of - 1.6 * 10-19 coulombs experiences a field of 1.4 * 105 newtons/coulomb. What is the magnitude of the electric force on this electron due to this field? 1.6 * 10-3 newtons 1.4 * 1024 newtons 2.2 * 10-14 newtons 7.

How food chain is disrupted through water pollution?

A star has a mass of 1.36 x 1030 kg and is moving in a circular orbit about the center of its galaxy. the radius of the orbit is 2.1 x 104 light-years (1 light-year = 9.5 x 1015 m), and the angular speed of the star is 1.1 x 10-15 rad/s.

Floating in deep space, you find yourself at rest next to a small asteroid. You reach out and tap the asteroid with a hammer. What happens to you in this process?

You walk forward at 1.5 m/s for 8s. Your friend decides to walk faster and starts out at 2.0 m/s for the first 4 s. Then she slows down and walks forward at 1.0 m/s for the next 4s. Make a distance-time graph of your motion and your friend's motion.

If the coolant in a refrigerator was not compressed back into a liquid after it flowed through the refrigerator what would happen

A electric model train travels at 0.339 m/s around a circular track of radius 1.75 m. How many revolutions does it perform per second, i. e, what is the motion's frequency?