Four resistors are connected in parallel: the resistance values are 4-ohms, 8-ohms,12-ohms, and 16-ohms: calculate the total circuit resistance
Answer:
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Estimation: Which of the following is the most reasonable estimate of the number of characters (typed letters or numbers) in a 609-page book? Assume an average of 194 words per page and a reasonable average number of letters per word.
A. 5 × 105 char B. 5 × 107 char C. 5 × 106 char D. 5 × 104 char
How fast must something be traveling if its mass increases by 10%?
What will be an ideal response?
A 3.00-m rod is pivoted about its left end. A force of 7.80 N is applied perpendicular to the rod at a distance of 1.60 m from the pivot causing a ccw torque, and a force of 2.60 N is applied at the end of the rod 3.00 m from the pivot. The 2.60-N force is at an angle of 30.0o to the rod and causes a cw torque. What is the net torque about the pivot? (Take ccw as positive.)
a. 16.4 N·m b. –8.58 N·m c. 8.58 N·m d. –16.4 N·m e. 4.68 N·m
Observer A sees a pendulum oscillating back and forth in a relativistic train and measures its period to be TA. Observer B moves together with the train and measures the period of the pendulum to be TB. These two results will be such that
A) TA > TB. B) TA = TB. C) TA < TB. D) TA could be greater or smaller than TB depending on the direction of the motion.