What is the requirement for a core to be used in an electromagnet?

The visible spectrum of sunlight reflected from Saturn's cold moon Titan would be expected to be (a) continuous; (b) an emission spectrum; (c) an absorption spectrum.

Muscles in animals are often found in pairs, because A. muscles can only produce a force as they relax. B. muscles can only pull. C. muscles need to be able to both push and pull. D. muscles can only push.

Continental crust is primarily witch kind of rock

IF your mass is 40 kg, what is your weight on earth

Which principle was a part of Aristotle's explanation of motion that Galileo corrected? The earth is flat Net force is equal to mass times acceleration Jupiter has moons Heavier objects fall faster than lighter ones

A plane is flying east at 135 m/s. The wind accelerates it at 2.18 m/s^2 directly northeast. After 18.0s, what is the magnitude of the displacement of the plane?

The same constant force, F, is applied to two blocks. The first block has a mass of M and the second block has a mass of 2M. Both blocks are initially at rest and the force acts on each of them for the same period of time, t.

Which of the following is an example of the strong nuclear force acting in an atom? A. A proton repelling a proton B. A neutron attracting a neutron C. A neutron repelling an electron D. An electron attracting a proton

Does the air in our atmosphere have mass?

Your instructor hands you a closed flask partly filled with room-temperature water. When you hold it, the heat transfer between your bare hands and the flask causes the water to boil. Quite impressive! How is this accomplished?