Which one has larger kinetic energy: a 500-kg object moving at 40 m/s or a 1000-kg object moving at 20 m/s?
A) The 500-kg object
B) The 1000-kg object
C) Both have the same kinetic energy.
A
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A sphere of radius R and mass M is released from rest, and rolls without slipping down a plane inclined at angle G above horizontal. What is the speed of the sphere after it has moved a distance L?
What will be an ideal response?
The figures below represent interference fringes. The distances from the screen to the slits is the same for each figure, and the planes of the screen and the slits are parallel. Which figure(s) represent(s) slits with the smallest spacing d between the slits? The white spaces represent the interference maxima.
A. I. B. II. C. III. D. IV. E. V.
The densest stars in the H-R diagram are the white dwarfs
a. True b. False Indicate whether the statement is true or false
How much energy would be required to accelerate a 77-kg professor from rest to 90% the speed of light? (c = 3.0 × 108 m/s)
A) 1.6 × 1019 J B) 2.1 × 1019 J C) 3.5 × 1019 J D) 2.8 × 1019 J E) 9.0 × 1019 J