A ball vibrates back and forth from the free end of an ideal spring having a force constant (spring constant) of 20 N/m
If the amplitude of this motion is 0.30 m, what is the kinetic energy of the ball when it is 0.30 m from its equilibrium position?
A) 0.45 J B) 0.90 J C) 0.22 J D) 0.00 J E) 1.4 J
D
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A transverse periodic wave is represented by the equation z(y, t) = 1.50 cm sin(1,250 rad/s t + 10.0
What is the velocity of the wave?
A. 125 m/s in the + z direction B. 250 m/s in the - z direction C. 125 m/s in the + y direction D. 125 m/s in the - y direction E. 250 m/s in the - y direction
A satellite of mass m1 circles a planet of mass m2 and radius r in an orbit at a height 2r above the surface of the planet. What minimum energy is required to change the orbit to one for which the height of the satellite is 3r above the surface of the planet?
A.
B.
C.
D.
E.
What is the mass density of argon gas at pressure 1.00 × 105 N/m2 and at temperature 300 K? The mean atomic mass of argon is 39.948 g/mol and the ideal gas constant is R = 8.314 J/mol ? K =
A) 1.40 kg/m3 B) 1.00 kg/m3 C) 1.20 kg/m3 D) 1.60 kg/m3 E) 1.80 kg/m3
One rem of radiation dose takes how many gammas per square centimeter?
A. about 1 B. about 5000 C. about a million D. about 2,000,000,000