Venus's retrograde spin is not unique among terrestrial planets.
Answer the following statement true (T) or false (F)
False
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A 1.6-kg block slides down a plane (inclined at 25° with the horizontal) at a constant speed of 2.0 m/s. At what rate is the frictional force changing the mechanical energy of the block?
A. +28 W B. +13 W C. ?13 W D. ?28 W E. +6.5 W
On a scale in which the distance from Earth to the Sun is about 15 meters, the distance from Earth to the Moon is ________
A) about 30 meters B) small enough to fit within your hand C) about 1 meter D) about 5 meters
A concave mirror forms a real image at 25.0 cm from the mirror surface along the principal axis. If the corresponding object is at a 20.0-cm distance, what is the mirror's focal length?
a. 1.43 cm c. 7.14 cm b. 16.7 cm d. 11.1 cm
During a lunar eclipse, the Moon's phase must be
A) first quarter. B) third quarter. C) full. D) new.