A ball is thrown straight up with a speed of 36 m/s. How long does it take to return to its starting point, assuming negligible air resistance?
A) 3.7 s
B) 7.3 s
C) 11 s
D) 15 s
B
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Volcanoes are formed by the eruptions of both lava and pyroclastics form steeply sloping, layered cones called ______________
Fill in the blank(s) with correct word
An object is placed 10 cm in front of a concave mirror with a 20-cm focal length. Determine the image location (in cm).
A. ?20 B. ?15 C. ?10 D. ?5 E. 6.7
Which of the following cannot induce a voltage in a loop of wire?
A. Changing the current in a nearby loop B. Moving the loop near a magnet C. Moving a magnet near the loop D. Expanding or contracting the loop in a region where there is no magnetic field
Two charges, Q1 and Q2, are separated by a certain distance R. If the magnitudes of the charges are doubled and their separation is also doubled, then what happens to the electrical force between these two charges?
A) It is doubled. B) It changes by a factor of 3. C) reduced by a factor of . D) It is quadrupled. E) It remains the same.