If you found a new element how would you know it was new

An object that has negative acceleration is definitely doing what? speeding up maintaining a constant speed slowing down (incorrect) accelerating in a direction that is opposite to a stated positive direction.

3. What is the mass of an object that is experiencing a net force of 200 N and an acceleration of 500 m/s"?

What did Ernest Rutherford expect to happen when he aimed a beam of particles at a thin gold foil?

Two brothers, Frank and Dion, are on roller skates and standing still when they push off from one another. Frank's mass is 103.4 kg. Dion's mass is 51.6 kg. After they push off, Frank has a velocity of - 7 m/s. What will Dion's velocity be?

a particle is constrained to move along a straight line through O. it starts initially at D, which is a fixed distance from O in the positive direction& moves at a constant velocity of 4ms^-1 for 15 sec.

In an experiment, all participants receive a treatment but those in the control group recieves a false treatments

When the volume increased, what happened to the density?

8. Chemical weathering occurs more rapidly in what kind of climates? A. Desertlike B. Cold with high snowfall amounts C. Cool and dry D. Warm with abundant rainfall

Recoil is noticeable if we throw a heavy ball while standing on a skateboard. If instead we go through the throwing motion but hold onto the ball, without friction effects our net recoil will be A) zero. B) the same as before.

If an electromagnet is used to pick up nails and other metal objects, what happens when the current is turned off?