A heavy frog and a light frog jump straight up into the air. They push off in such away that they both have the same kinetic energy just as they leave the ground. Air resistance is negligible
Which of the following statements about these frogs are correct? (There could be more than one correct choice.) A) Just as they leave the ground, the heavier frog is moving faster than the lighter frog.
B) Just as they leave the ground, the lighter frog is moving faster than the heavier frog.
C) They both leave the ground with the same speed.
D) The lighter frog goes higher than the heavier frog.
E) The heavier frog goes higher than the lighter frog.
F) Both frogs reach the same maximum height.
B, F
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Radio dishes are large in order to:
A) attract funding from NASA and the NSF. B) give greater magnification. C) increase their angular resolution and collect the very weak radio photons. D) increase the range of waves they can collect. E) detect shorter waves than optical telescopes for superior resolution.
The logarithm of the ratio of the initial cross-sectional area to the area at the location of fracture of a specimen is equal to the _____________ to fracture.
Fill in the blank(s) with the appropriate word(s).
In a Hertzsprung-Russell (H-R) diagram, a star is represented by a _____ on the graph that tells you its luminosity and temperature
A) cross B) broken line C) point D) dotted line
If you travel north for a mile and then south for a mile, your average speed:
a. will depend on the direction of your velocity. b. will be a lot less than the magnitude of your average velocity. c. will be a lot greater than the magnitude of your average velocity. d. will depend on how far you finished from where you started. e. will be the same as the magnitude of your average velocity.