Torque: A man in a gym is holding an 8.0-kg weight at arm's length, a distance of 0.55 m from his shoulder joint. What is the torque about his shoulder joint due to the weight if his arm is horizontal?
A. 0.24 N ? m
B. 4.4 N ? m
C. 43 N ? m
D. 15 N ? m
E. 0 N ? m
Answer: C
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A string with a mass per length of 2.00 g/m is stretched between two points that are 0.400 m apart. The second mode frequency of the stretched string is 50.0 Hz lower than the third mode frequency. What is the tension in the string?
A. 400 N B. 375 N C. 321 N D. 281 N E. 250 N
An M type star 1,000 times more luminous than the Sun will be located near the ________ part of the H-R diagram.
A. bottom right B. center C. top left D. top right E. bottom left
What is the source of Jupiter's nonthermal radio radiation?
What will be an ideal response?
In a certain region, the electric potential due to a charge distribution is given by the equation V(x,y,z) = 3x2y2 + yz3 - 2z3x, where x, y, and z are measured in meters and V is in volts
Calculate the magnitude of the electric field vector at the position (x,y,z) = (1.0, 1.0, 1.0). A) 4.3 V/m B) 2.0 V/m C) -8.1 V/m D) 8.6 V/m E) 74 V/m