When using science to investigate physical phenomena, which characteristic of the event must exist?

a. predictable

b. observable

c. provable

d. readable

How can you make a magnet that turns on and off

The change in an object's momentum is equal to

A 300-n force acts on a 25-kg the acceleration of the object is what

You no longer feel your clothes against your skin after you have been wearing them for a while. What explains this?

A 3.8 kg object is lifted 12 meters. approximately how much work is performed during the lifting?

You push a shopping cart filled with groceries (total mass = 20 kg) by applying a force to the cart 30° from the horizontal. If the force you apply has a magnitude of 86 N, what is the cart's acceleration? Assume negligible friction.

Does water expand more as the temperature drops even more below 0 deg? I am worried about the coolant in my rad. as the temp. is 40deg below.

A 1.00-kilogram ball is dropped from the top of a building. just before striking the ground, the ball's speed is 12.0 meters per second.

Why oil does not dissolve in water?

Which element has the highest number of protons? a. Calcium b. Argon c. Xenon d. Radon