7. What type of mineral can scratch glass, but cannot scratch steel?

A. Gypsum

B. Diamond

C. Feldspar

D. Fluorite

A real spring eventually comes to a stop. Does this violate the law of conservation of energy.

What are the largest - and smallest-known values of the mass, luminosity, surface temperature, and diameter of stars (roughly) ?

A person who is addicted to drugs and stops using it suddenly is likely to experience blank symptoms

What are 3 uses of infrared radiation.

Which term describes substances that absorb some wavelenths of light

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.