A bird, accelerating from rest at a constant rate, experiences a displacement of 37 m in 11 s. What is the final velocity after 11 s?
a. 6.7 m/s
c. 13 m/s
b. 5.1 m/s
d. zero
A
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Which statement about the stages of starbirth is FALSE?
A) At stage 1, only the cloud exists. B) By stage 3, the star has formed a photosphere. C) Nuclear reactions begin in the core by stage 4. D) The T-Tauri wind is prevalent in stage 5. E) By stage 7, the star has reached the main sequence.
A 2.0-C charge moves with a velocity of (
m/s and experiences a magnetic force of 
N. The x component of the magnetic field is equal to zero. Determine the z component of the magnetic field.
A. ?3.0 T B. +3.0 T C. +5.0 T D. ?5.0 T E. +6.0 T
An ideal Carnot engine operates between a high temperature reservoir at and a river with water at If it absorbs of energy each cycle, how much work per cycle does it perform?
A) 1642 J B) 2358 J C) 1483 J D) 2517 J
A beam of light in air is incident on a glass slab at an angle of incidence ?i < 90°. After entering the glass slab, the beam of light
A) does not change its path. B) follows the normal to the glass slab. C) bends away from the normal drawn at the point of contact. D) bends closer to the normal drawn at the point of contact.