Express 45°C in °F
A) 81°F
B) 25°F
C) 57°F
D) 113°F
E) 127°F
D
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If an object is located 20 m to the right of the origin at 1:00 PM, and later the object is located 30 m to the right of the origin at 2:00 PM, then the displacement from 1:00 PM to 2:00 PM is
A. 50 m to the right. B. 30 m to the right. C. 25 m to the right. D. 20 m to the right. E. 10 m to the right.
Four resistors of 12, 3.0, 5.0, and 4.0 ? are connected in parallel. A 12-V battery is connected to the combination. What is the current through the battery?
A) 10 A B) 5.0 A C) 2.5 A D) 0.50 A E) 0.25 A
The spectra of Type II supernova contain no hydrogen lines
a. True b. False Indicate whether the statement is true or false
Jennifer hits a stationary 200. gram ball and it leaves the racket at 40. m/s. If time lapse photography shows that the ball was in contact with the racket for 40. ms:
(a) What average force was exerted on the racket? (b) What is the ratio of this force to the weight of the ball?