The center of our galaxy is located in the direction of the constellation of Orion
a. True
b. False
Indicate whether the statement is true or false
False
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A 200-kg box is placed on a ramp. As one end of the ramp is raised, the box begins to move downward just as the angle of inclination reaches 18.0°. What is the coefficient of static friction between box and ramp?
a. 0.42 b. 0.32 c. 3.1 d. 0.27 e. 62
A baseball pitcher, loosening up his arm before a game, tosses a 0.15-kg ball using only the rotation of his forearm, 0.32 m in length, to accelerate the ball. If the ball starts at rest and is released with a speed of 24 m/s in a time of 0.40 s, what is the average angular acceleration of the arm and ball?
a. 0.067 rad/s2 c. 15 rad/s2 b. 94 rad/s2 d. 190 rad/s2
A convex mirror has a focal length of -20 cm. What is the object distance if the image distance is -10 cm?
a. 10 cm b. 40 cm c. 60 cm d. 20 cm e. 30 cm
What physical process results in the convection of thermal energy?
a. Collisions between the particles in a material. b. The movement of a fluid through a space. c. The energy exchange when a liquid becomes a gas. d. The energy transferred by electromagnetic waves traveling between objects. e. Brownian motion.