The average speed of air molecules at room temperature is about:
A. zero
B. 2 m/s (walking speed)
C. 30 m/s (fast car)
D. 500 m/s (supersonic airplane)
E. 3 × 108 m/s (speed of light)
Answer: D. 500 m/s (supersonic airplane)
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A 10.0-kg picture is held in place by two wires, one hanging at 50.0° to the left of the vertical and the other at 45.0° to the right of the vertical. What is the tension in the first wire?
A) 69.6 N B) 50.8 N C) 98.1 N D) 69.4 N E) 23.8 N
Earth's albedo is ______________
Fill in the blank(s) with correct word
A projectile is fired from ground level with an initial speed of 55.6 m/s at an angle of 41.2° above the horizontal. Neglect air resistance, take upward as the positive direction, and use g = 9.8 m/s2
(a) Determine the time necessary for the projectile to reach its maximum height. (b) Determine the maximum height reached by the projectile. (c) Determine the horizontal and vertical components of the velocity vector at the maximum height. (d) Determine the horizontal and vertical components of the acceleration vector at the maximum height.
The peak of a body's blackbody radiation curve shifts upward as the temperature of the body increases
Indicate whether the statement is true or false