A 2.00 kg mass is connected to a spring with a spring constant of 9.00 N/m. The displacement is given by the expression x(t) = 12.0 cm sin
What is the period of the simple harmonic motion?
A. 4.75 sec
B. 4.27 sec
C. 3.95 sec
D. 3.36 sec
E. 2.96 sec
E. 2.96 sec
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If the Earth's rotation axis were tilted by 45 degrees instead of 23.5 degrees, what are some of the implications, and why?
A) The seasons would be less extreme, because the Sun's rays would be less direct in summer, and more direct in winter. B) The seasons would be more extreme, because the surface of the Earth would be closer to the Sun in the summer, and farther from the Sun in the winter. C) The seasons would be less extreme, because the surface of the Earth would be farther from the Sun in the summer, and closer to the Sun in the winter. D) The seasons would be more extreme, because the Sun's rays would be more direct in summer, and less direct in winter.
An ideal Carnot engine operates between a high temperature reservoir at and a river with water at If it absorbs of energy each cycle, how much work per cycle does it perform?
A) 1642 J B) 2358 J C) 1483 J D) 2517 J
A child does 350 J of work while pulling a box from the ground up to his tree house at a steady speed with a light rope. The tree house is 4m above the ground. What is the mass of the box?
A) 8.9 kg B) 8.0 kg C) 5.3 kg D) 6.7 kg
A glass plate whose index of refraction is 1.66 is immersed in a liquid. The surface of the glass is inclined at an angle of 44° with the vertical. A horizontal ray in the glass is incident on the interface
When the liquid is a certain alcohol, the incident ray arrives at the interface at the critical angle. The index of refraction of the alcohol is closest to: A) 1.15 B) 1.13 C) 1.11 D) 1.09 E) 1.17