Which of the following particles are baryons?
A) electrons
B) neutrinos
C) protons
D) quarks
E) photons
C
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A 60.0-cm long string with a mass 8.00 g has a tension 200 N. What is the fundamental frequency of this string?
A) 38.7 Hz B) 1500 Hz C) 56.7 Hz D) 102 Hz E) 3.75 Hz
Reaction forces are given in terms of load variable P for the truss below (see boxed expressions next to reaction force arrows). The force in member FD is:
(A) 1.76P
(B) 21.76P
(C) 22.14P
(D) 24.24P
A frictionless pendulum clock on the surface of the earth has a period of 1.00 s. On a distant planet, the length of the pendulum must be shortened slightly to have a period of 1.00 s
What is true about the acceleration due to gravity on the distant planet? A) The gravitational acceleration on the planet is slightly greater than g. B) The gravitational acceleration on the planet is slightly less than g. C) The gravitational acceleration on the planet is equal to g. D) We cannot tell because we do not know the mass of the pendulum.
A CD has a diameter of 12.0 cm. If the CD is rotating at a constant angular velocity of 20.0 radians per seconds, then the period of the rotational motion is
A. 0.314 s. B. 0.441 s. C. 0.582 s. D. 0.698 s. E. 0.750 s.