A change in the apparent frequency of waves caused by the motion of either the observer or the source of the waves
A) ultrasonography
B) photosonography
C) doppler effect
Ans: C) doppler effect
Physics & Space Science
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Power: A battery is rated at 12 V and 160 A-h. How much energy does this battery store?
A. 1.9 kJ B. 6.0 kJ C. 1.9 MJ D. 6.9 MJ
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Why are most meteorites found in Antarctica?
What will be an ideal response?
Physics & Space Science
Spectra for the Cygnus loop and the Orion nebula are shown above. Which of these is seen in the Orion nebula, but is not clearly visible in the Cygnus loop spectrum?
A) ionized sulfur B) atomic helium C) atomic hydrogen D) ionized oxygen
Physics & Space Science
A box slides across a floor and comes to rest. The work done by the frictional force on the box is a. positive
b. negative. c. zero. d. impossible to determine without knowing the coefficient of friction.
Physics & Space Science