What is the equation of motion of a 30. gram mass on a spring of stiffness 3.0 N/m if it is initially displaced 7.7 cm and released?
What will be an ideal response?
y = 7.7 cos(10 t) where y is in cm and t in seconds.
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The following equation was obtained by solving a physics problem: 
The best physical representation of the situation is
A. A car traveling at 16.0 m/s is 19.2° into a turn of a quarter circle on a level road. B. A mass on a string that is originally horizontal has fallen to where the angle between the string and the vertical direction is 19.2°. C. A mass on a string originally horizontal has fallen 19.2° from the horizontal direction. D. A car traveling at 16.0 m/s is on a circular curve banked at 19.2°. E. A car traveling at 16.0 m/s and going over a semicircular mountain-top road is 19.2° down from the top.
The helium flash converts helium into ________
Fill in the blank(s) with correct word
Two space stations are at rest relative to each other and are 6.0 × 107 m apart, as measured by observers on the stations
A spaceship traveling from one station to the other at 0.90c relative to the stations passes both of them, one after the other. As measured by an observer in the spaceship, how long does it take to travel from one station to the other? (c = 3.00 × 108 m/s) A) 97 ms B) 510 ms C) 39 ms D) 220 ms E) 58 ms
How have astronomers discovered planets orbiting a star beyond the Sun?
A. They can see the planet brighten as it passes in front of its parent star. B. They have bounced radar off them. C. They can be detected by the slight gravitational tug that they exert on their parent stars. D. So far, no planets have been discovered around any other stars.