A 0.250-kg stone is attached to an ideal spring and undergoes simple harmonic oscillations with a period of 0.640 s. What is the spring constant of the spring?
A) 2.45 N/m
B) 12.1 N/m
C) 24.1 N/m
D) 0.102 N/m
E) 0.610 N/m
C
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Why would the weather become more severe as the greenhouse effect increased?
A) The depleted ozone layer would let in more particles from the solar wind. B) Warming of the planet would lead to terrible droughts and reduce the amount of water on the Earth. C) Warming would increase the evaporation of the oceans, leading to more water in the atmosphere and more frequent and severe storms. D) Warming would dry out the atmosphere and the crust, leading to devastation of the Earth through more meteor bombardment and volcanism. E) all of the above
How would you "weigh" the astronauts in orbit (where they feel weightless) so that you can keep them in good health?
What will be an ideal response?
A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the deceleration of the car?
A) 110 m/s2 B) 220 m/s2 C) 800 m/s2 D) 880 m/s2 E) need more information
A toy rocket is launched vertically from ground level at time t = 0 s. The rocket engine provides constant upward acceleration during the burn phase
At the instant of engine burnout, the rocket has risen to 49.0 m and acquired an upward velocity of 60.0m/s The rocket continues to rise with insignificant air resistance in unpowered flight, reaches maximum height, and falls back to the ground. The maximum height reached by the rocket is closest to A) 221 m. B) 209 m. C) 244 m. D) 233 m. E) 256 m.