A rock is thrown straight up with an initial velocity of 15.0 m/s. Ignore energy lost to air friction. How high will the rock rise?
a. 7.5 m
b. 113 m
c. 23.0 m
d. 11.5 m
e. 0.0871 m
d
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Which cones on the eye are most sensitive to light?
A) red B) infrared C) green D) UV E) blue
This figure shows Hubble's law. If a galaxy is observed to be moving away from us at 30,000 (3 104) km/s, approximately how far away is it? (Hint: Be sure to read the axis labels carefully.)
A) 30,000 light-years B) 1400 million light-years C) 3000 million light-years D) 1400 light-years
A metal rod of length L in a region of space where a constant magnetic field points into the page rotates clockwise about an axis through its center at constant angular velocity ?. While it rotates, the point(s) at lowest potential is(are)
A. A. B. B. C. C. D. D. E. A and E.
A 2.5-mC charge is on the y-axis at y = 3.0 m and a 6.3-mC charge is on the x-axis at x = 3.0 m. What is the direction of the potential at the origin?
A. 22.0
B. 168
C. 292
D. 332
E. potential has no direction