Monochromatic light (l = 500 nm) is incident on a soap bubble (n = 1.40). What is the wavelength of the light (in nm) in the bubble film?
a. 255
b. 500
c. 700
d. 357
e. 422
D
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Rotational Kinetic Energy: A pencil that is 15.7 cm long is released from a vertical position with the eraser end resting on a table. The eraser does not slip as it tips over. Treat the pencil like a uniform rod. What is the angular speed of the pencil just before it hits the table?
A. 13.7 rad/s B. 7.23 rad/s C. 3.70 rad/s D. 24.5 rad/s E. 16.8 rad/s
What makes the subject of star formation so difficult and complex?
A) It is so slow that no visible proof of it exists. B) Star formation is too expensive to study in detail. C) Stars live too long to be observed from birth to death. D) Clouds, fragments, protostars, stars, and nebulae all interact and influence each other. E) Shock waves disrupt the orderly evolution of stars.
An object moving on the x axis with a constant acceleration increases its x coordinate by 80 m in a time of 5.0 s and has a velocity of +20 m/s at the end of this time. Determine the acceleration of the object during this motion
a. ?1.6 m/s2 b. +6.4 m/s2 c. +1.6 m/s2 d. ?2.0 m/s2 e. ?6.4 m/s2
An object of mass m moves to the right with a speed v. It collides head-on with an object of mass 3m moving with speed v/3 in the opposite direction. If the two objects stick together, what is the speed of the combined object, of mass 4m, after the collision?
1.0 2.v/2 3.v 4.2v