A car starting from a standstill accelerates at a rate of 4 meters per second squared. how far, in kilometers, will the car travel in 20 seconds

A. 0.8km

B. 800km

C. 40km

D. 1,600km

Two scientists are experimenting with pure samples of isotope X, a highly radioactive substance. The first scientist has a sample with a mass of 20 grams. He measures a half-life of 232 seconds.

What is the weight on earth of a girl with a mass of 16 kg?

Who descover gravity and when?

A dog is pulling a sled by applying a force of 75 newtons on it. The angle of force from the ground is 45°. If the sled moves 15 meters, how much work is done by the dog on the sled?

The descendants of a plant or animal considered as a group. A. offspring B. parents C. ancestors D. species

How does the lever arm change if you decrease the angle of the force?

Why does changing the shape of an object have no effect on the density of that object?

2. Vehicle-braking distance is the distance your vehicle travels after you see a problem before you apply the brakes. A. true B. false

On a sky coaster (human pendulum) that reaches 10 meters from it's equilibrium position, a man of 120 kg is able to reach a maximum speed of 18m/s 14m/s 1200m/s 11m/s

two wires each have a current running through them and are placed next to each other. will one wire be affected by a force from the other? and why?