Lonnie pitches a baseball of mass 0.15 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to Lonnie with a return speed of 60 m/s. If the bat is in contact with the ball for 0.050 s, what is the impulse experienced by the ball?
a. 360 N•s
c. 400 N•s
b. 20 N•s
d. 15 N•s
D
Physics & Space Science
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If a sunspot has a temperature of 4,500 K and the surrounding solar surface has a temperature of 5,800 K, how many times brighter is the surface compared to the sunspot?
a. 0.28 b. 0.36 c. 2.8 d. 3.6 e. 36
Physics & Space Science
State Newton's first law of motion
What will be an ideal response?
Physics & Space Science
An ideal gas is allowed to expand adiabatically until its volume increases by 50%. By approximately what factor is the pressure reduced? (g = 5/3.)
a. 1.5 b. 2.0 c. 2.5 d. 3.0 e. 3.5
Physics & Space Science
This diagram represents the carbon dioxide cycle. Which position in the diagram represents the part of the cycle in which carbon dioxide is turned into carbonate minerals and rock?
A) Position 1 B) Position 2 C) Position 3 D) Position 4
Physics & Space Science