Which of the following is transported by all traveling waves?
A) light
B) matter
C) particles
D) energy
E) both energy and matter
D
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An astronaut in a space suit is motionless in outer space. The propulsion unit strapped to her back ejects some gas with a velocity of 40.0 m/s. The astronaut recoils with a velocity of 1.00 m/s. If the mass of the astronaut and space suit after the gas is ejected is 100 kg and the mass of the gas ejected is 2.50 kg, then the total kinetic energy after the ejection of the gas is
A. 2,050 J. B. 3,430 J. C. 4,150 J. D. 5,070 J. E. 6,320 J.
A neutron will more likely slow in speed if it bounces from a
A) light-weight nucleus. B) nucleus of moderate mass. C) heavy nucleus. D) none of the above
When you ______ an image, you select the part of the image you want to keep and remove the unwanted portion.
A. compress B. rasterize C. crop D. focus
What happens during the apparent retrograde motion of a planet?
A. The planet rises in the west and sets in the east. B. The planet moves backward through the sky over the course of a night. C. The planet appears to move westward with respect to the stars over a period of many nights. D. The planet moves backward in its orbit around the Sun.