A bicycle has wheels that are 60 cm in diameter. What is the angular speed of these wheels when it is moving at 4.0 m/s?
A) 1.2 rad/s
B) 4.8 rad/s
C) 0.36 rad/s
D) 13 rad/s
E) 7.6 rad/s
D
Physics & Space Science
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A particle moves along a path and its speed increases. In which of the following cases are its acceleration and velocity vectors parallel?
1.when the path is a parabola 2.when the path is straight 3.when the path is circular 4.never
Physics & Space Science
High-energy photons are used to bombard an unknown metal. The strongest peak is found for X-rays with an energy of 66 keV. What is the atomic number of the metal?
A) 80 B) 81 C) 82 D) 83 E) 84
Physics & Space Science
For a system undergoing an isothermal process,
a. 
b. 
c. 
d. 
e. 
Physics & Space Science
Why is it easier to find an iron meteorite on the ground that it is to witness one fall?
What will be an ideal response?
Physics & Space Science