On average the moon's umbral shadow is
a. to bright to produce a total solar eclipse.
b. to faint to produce a total solar eclipse.
c. to wide to produce a total solar eclipse.
d. too long to produce a total solar eclipse.
e. to short to produce a total solar eclipse.
E
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An electron is released from rest at a distance of 9.00 cm from a proton
If the proton is held in place, how fast will the electron be moving when it is 3.00 cm from the proton? (mel = 9.11 × 10-31 kg, e = 1.60 × 10-19 C, k = 1/4??0 = 8.99 × 109 N • m2/C2) A) 75.0 m/s B) 106 m/s C) 130 m/s D) 1.06 × 103 m/s E) 4.64 × 105 m/s
A box B sits in the back of a truck T as the truck slows down for a stop (the box remains motionless relative to the truck). What is the appropriate symbol for the horizontal force that the contact interaction between the box and the truck exerts on the truck?
A. 
B. 
C. 
D. 
E. 
F. Other (specify)
Because of its small size, the surface of Pluto was found by New Horizons to be old and geologically dead
Indicate whether the statement is true or false
The drive chain in a bicycle is applying a torque of 0.850 Nm to the wheel of the bicycle. Treat the wheel as a hoop with a mass of 0.750 kg and a radius of 33.0 cm. What is the angular acceleration of the wheel?
A) 10.4 rad/s2 B) 20.8 rad/s2 C) 5.20 rad/s2 D) 3.43 rad/s2 E) 1.06 rad/s2