The mass of a proton is 1.7 × 10-27 kg. What is the weight of 6.0 × 1023 protons?
What will be an ideal response?
0.010 N
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In order to see a rainbow, the Sun must be directly in front of you
a. True b. False Indicate whether the statement is true or false
Three 2.50-?C charges are placed on tiny conducting spheres at the ends of 1.00 m-long strings that are connected at 120° angles as shown below. The magnitude, in N, of the tension in any one of the strings is
?
?
A. 1.88 × 10?2. B. 3.25 × 10?2. C. 3.75 × 10?2. D. 6.50 × 10?2. E. 7.50 × 10?2.
At t = 0, a particle leaves the origin with a velocity of 9.0 m/s in the positive y direction and moves in the xy plane with a constant acceleration of (2.0i - 4.0j) m/s2 . At the instant the x coordinate of the particle is 15 m, what is the speed of the particle?
a. 10 m/s b. 16 m/s c. 12 m/s d. 14 m/s e. 26 m/s
Work: A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position. How much work did gravity do on the bucket during this process?
A. 180 J B. 90 J C. 45 J D. 0 J E. 900 J