You are moving past the Earth at 0.99c and notice your heart beating 88. times/minute
(a) Your doctor on Earth observes your heart rate to be what?
(b) If you had been moving 99.99% the speed of light, you would have observed your heart to be beating how fast?
(a) 12. beats/min
(b) 88. beats/min
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Velocity Addition: Two spaceships approach Earth from the same direction. One has a speed of 0.21c and the other a speed of 0.34c, both relative to Earth. What is the speed of one spaceship relative to the other?
A. 0.13c B. 0.14c C. 0.15c D. 0.16c E. 0.18c
Electric Field of Point-Charges: Three equal-magnitude point charges of varying signs are placed at three of the corners of a square of side d as shown in the figure. Which one of the arrows shown represents the direction of the net electric field at the vacant corner of the square?
A. A B. B C. C D. D
Gravitational lensing is the process by which
A) a massive object magnifies and distorts the light from an object behind it B) the wavelengths of light from a star are shifted as it moves about its center of mass C) a planet passes in front of its parent star and blocks part of its light D) a massive object accelerates another object that passes close to it
As a general rule, there is a(n) __________ relationship between increased stream order and stream size
What will be an ideal response?