The speed of a particle moving in a circle 2.0 m in radius increases at the constant rate of 4.4 m/s2 . At an instant when the magnitude of the total acceleration is 6.0 m/s2, what is the speed of the particle?
a. 3.9 m/s
b. 2.9 m/s
c. 3.5 m/s
d. 3.0 m/s
e. 1.4 m/s
b
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If a ?- particle at rest decays into a neutron and a ?- , what is the total kinetic energy of the decay products?
The masses of ?-, neutron, and ?- are 1197 MeV/c2, 940 MeV/c2, and 140 MeV/c2, respectively.
The fact that a particle cannot be precisely localized is the
a. photoelectric effect b. uncertainty principle c. principle of a hologram d. principle of a laser e. reason why photons are emitted
When you walk barefoot in a room, the floor feels cooler walking on a tile floor as compared to a wooden floor because
A) tile has a smaller specific heat than wood. B) tile has a larger specific heat than wood. C) tile has a smaller thermal conductivity than wood. D) tile has a larger thermal conductivity than wood. E) none of the above
A 47.0-kg person steps on a scale in an elevator. The scale reads 461 N. What is the elevator doing?
What will be an ideal response?