If VA ? VB = 50 V, how much energy is stored in the 54-?F capacitor?
a.
50 mJ
b.
13 mJ
c.
28 mJ
d.
8.9 mJ
e.
17 mJ
b
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The distance between the object and the eyepiece of a compound microscope is 18.0 cm. The focal length of its objective lens is 0.80 cm
and the eyepiece has a focal length of 2.3 cm. The near-point distance of the person using the microscope is 25.0 cm. What is the total overall magnification of the microscope? A) -120 x B) -184 x C) -200 x D) -360 x E) -480 x
Uniform Circular Motion: A particularly scary roller coaster contains a loop-the-loop in which the car and rider are completely upside down. If the radius of the loop is 13.2 m, with what minimum speed must the car traverse the loop so that the rider does not fall out while upside down at the top? Assume the rider is not strapped to the car.
A. 11.4 m/s B. 12.5 m/s C. 10.1 m/s D. 14.9 m/s
The inner boundary of the Sun's habitable zone currently lies
A) between the orbits of the Earth and Venus B) between the orbits of Venus and Mercury C) exactly at the distance of the Earth's orbit D) exactly at the distance of Venus
Why do we think Mars had more volcanic activity in the past than it does today?
a. Mars was bombarded with more impacts in the past, which fueled more volcanic activity. b. Mars’ interior would have been warmer in the past. c. Some meteorites from Mars come from relatively young lava. d. All of the above. e. b and c.