Which one [or ones] of the following is a possible final state for a star that has come to the end of its "lifetime" by running out of fuel and then gravitationally collapsing?
A) neutron star
B) white dwarf
C) black hole
D) All of the above.
E) None of the above.
D
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A 4-mol ideal gas system undergoes an adiabatic process where it expands and does 28 J of work on its environment. What is its change in internal energy?
a. 28 J c. zero b. -28 J d. -7 J
When writing in the inverted pyramid style, the first paragraph should include the "who, what, when, where, and why" of the topic.
Answer the following statement true (T) or false (F)
A straight 10-cm wire bent at its midpoint so as to form an angle of 90° carries a current of 10 A. It lies in the xy plane in a region where the magnetic field is in the positive z direction and has a constant magnitude of 3.0 mT. What is the magnitude of the magnetic force on this wire?
a. 3.2 mN b. 2.1 mN c. 5.3 mN d. 4.2 mN e. 6.0 mN
When the frequency of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons __________
Fill in the blank(s) with correct word