The Eiffel tower in Paris is made primarily of iron, whose coefficient of linear expansion is about 10 × 10^?6/°C. On a cold day when the temperature is ?10°C the Eiffel tower is 300 meters tall. Its height on a hot day when the temperature is 40°C is 300.15 m
a. True
b. False
Indicate whether the statement is true or false
True
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Torque: A man in a gym is holding an 8.0-kg weight at arm's length, a distance of 0.55 m from his shoulder joint. What is the torque about his shoulder joint due to the weight if his arm is held at 30° below the horizontal?
A. 22 N ? m B. 2.2 N ? m C. 4.4 N ? m D. 13 N ? m E. 37 N ? m
We have found Titan's surface to be perfect living condition for earthlike life
Indicate whether the statement is true or false
Most of the mass of the galaxy is located at the galactic center in the form of a massive black hole
Indicate whether the statement is true or false
A block lies on a smooth inclined plane tilted at an angle of 35° to the horizontal. (a) Draw the free-body diagram for the block. (b) Determine the block's acceleration as it slides down the inclined plane
(c) If the block started from rest 8.5 m up the incline from its base, determine the block's speed when it reaches the bottom of the incline. (d) How long did it take the block to reach the bottom of the inclined plane?