In which type of collision is no kinetic energy lost?
A. A perfectly elastic collision
B. A perfectly inelastic collision
C. A partially inelastic collision
D. Energy is always conserved
A. A perfectly elastic collision
Physics & Space Science
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The half-life of 131I is 8 days. On a certain day, the activity of an 131I sample is 6.4 mCi. What is its activity 40 days later?
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The radius of the earth is R. At what distance above the earth's surface will the acceleration of gravity be 4.9 m/s2?
A) 0.41 R B) 0.50 R C) 1.00 R D) 1.41 R E) 0.25 R
Physics & Space Science
Machines produce less work than is used to run the machine
What will be an ideal response?
Physics & Space Science
For which of the following will the phenomenon of wave interference apply? (Choose the best answer.)
1.square-shaped pulses 2.sinusoidal pulses 3.triangular pulses 4.all of these
Physics & Space Science