If you are driving 72 km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive period?
A) 40 m B) 20 m C) 18 m D) 80 m
D
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Stars on the upper left of the H-R diagram are longer lived than those on the lower right
Indicate whether the statement is true or false
A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west, and the acceleration of the car has components of 2.4 m/s2 east and 1.8 m/s2 south. What is the radius of the circle?
A. 0.24 km B. 0.19 km C. 0.32 km D. 0.14 km E. 0.27 km
Light spreads out when it passes through a narrow slit because of interference
a. True b. False Indicate whether the statement is true or false
According to the law of reflection, a light ray striking a mirror at an angle of incidence of 30 degrees will leaves the mirror at an angle of
a. 60 degrees. b. 30 degrees. c. less than 30 degrees. d. none of the above.