A 1200-kg car is pulling a 500-kg trailer along level ground. Friction of the road on the trailer is negligible. The car accelerates with an acceleration of 1.3 m/s2. What is the force exerted by the car on the trailer?
A) 550 N
B) 600 N
C) 650 N
D) 700 N
E) 750 N
C
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From studies of the rotations of galaxies and dynamics of clusters, we now think that about ________ of the mass of the universe is composed of dark matter
Fill in the blank(s) with correct word
Peak values for a neodymium-glass laser are 600 J for 1.00 nanosecond. If the cross-section of the laser beam is 1.10 cm2, what are the maximum values of E and B? (µ0 = 4? × 10^?7 T?m/A, c = 3.00 × 10^8 m/s)
a. 2.0E+9 V/m, 1.9 T b. 5.7E+8 V/m, 6.8 T c. 2.0E+9 V/m, 6.8 T d. 5.7E+8 V/m, 1.9 T e. Not enough information.
General Questions: You are in a train traveling on a horizontal track and notice that a piece of luggage starts to slide directly toward the front of the train. From this observation, you can conclude that this train is
A. speeding up. B. slowing down. C. changing direction. D. speeding up and changing direction. E. slowing down and changing direction.
Within about 4 AU, all planets are rocky
Indicate whether the statement is true or false