A 60.0-kg person rides in elevator while standing on a scale. The elevator is traveling downward but slowing down at a rate of 2.00 m/s2. The reading on the scale is closest to
A) 708 N. B) 469 N. C) 589 N. D) 120 N. E) 349 N.
A
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8.0 grams of water initially at 100°C are poured into a cavity in a very large block of ice initially at 0°C. How many g of ice melt before thermal equilibrium is attained?
A) 10 g B) 900 g C) 500 g D) 100 g E) an unknown amount; it cannot be calculated without first knowing the mass of the block of ice
Unlike spherical mirrors, spherical lenses do not have a focal length equal to ______________
Fill in the blank(s) with correct word
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
When SI units are plugged into an equation, it is found that the units balance. Which of the following can we expect to be true for this equation?
a. The equation will be dimensionally correct. b. The equation will be dimensionally correct except sometimes in cases when the right-hand side of the equation has more than one term. c. The equation will not be dimensionally correct. d. All constants of proportionality will be correct.