A 1500-kg car accelerates from 0 to 25 m/s in 7.0 s with negligible friction and air resistance. What is the average power delivered by the engine? (1 hp = 746 W)
A) 50 hp
B) 60 hp
C) 70 hp
D) 80 hp
E) 90 hp
E
Physics & Space Science
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Three 1.0 
C charges are placed along the x-axis, one charge at x = -10 cm, another at the origin, and the last one at x = 10 cm. What is the total potential energy of this arrangement?
A. 0.27 J B. -0.27 J C. 0.72 J D. 0.23 J E. infinite (or indeterminate)
Physics & Space Science
Why do some supernovae form neutron star remnants instead of white dwarfs?
What will be an ideal response?
Physics & Space Science
The rings of ____________ were discovered when they occulted a star
Fill in the blank(s) with correct word
Physics & Space Science
A given individual is unable to see objects clearly when they are beyond 100 cm. What focal length lens should be used to correct this problem?
a. ?100 cm b. ?33.3 cm c. ?20 cm d. 75 cm e. 100 cm
Physics & Space Science