Is energy absorbed or given off when an electron and a hole of a semi-conductor crystal

recombine? What are the forms of energy that can be absorbed or given off?

The spreading of waves behind an aperture ismore for long wavelengths and less for short wavelengths. less for long wavelengths and more for short wavelengths. the same for long and short wavelengths. not discussed in this chapter.

An object will not lose its blank as it moves away from earths surface, but it will lose blank

A person is pushing a box across a table. The measured forces on the box are 10N, 14N, - 7N, - 10N. Which force is represented by - 7N?

Mechanical advantage what does this mean for a simple machine

If the forces acting on an object are balanced, what is that objects acceleration?

Is a lung a living organism, why or why not?

A wire carries a steady current of 2.20 A. A straight section of the wire is 0.750 m long and lies along the y axis within a uniform magnetic field, vector B = 1.70 k T.

A 5.00-kg howler monkey is swinging due east on a vine. It overtakes and grabs onto a 6.00-kg monkey also moving east on a second vine. The first monkey is moving at 10.0 m/s at the instant it grabs the second, which is moving at 7.00 m/s.

One of the heating systems we talked about in this course comprises of a system of ducts. What is the process by which heat is transferred in this system? a. Conduction b. Convection c. Radiation d. None of the above

If the north pole of a magnet in a compass is attracted to Earth's geographic north, what must be the polarity of Earth's magnetic north pole? A. north B. south C. It can't be determined from the information given.