A 2.00 kg pendulum bob on a string 3.00 m long is released with a velocity of 1.00 m/s when the support string makes an angle of 30.0 degrees with the vertical. What is the tension in the string at the highest point of its motion?
A. 30.8 N
B. 27.5 N
C. 20.1 N
D. 16.6 N
E. 10.5 N
D. 16.6 N
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If a solid metal sphere and a hollow metal sphere of equal diameters are each given the same charge, the electric field ( ) midway between the sphere center and the surface is
A) greater for the solid sphere than for the hollow sphere. B) greater for the hollow sphere than for the solid sphere. C) zero for both. D) equal in magnitude for both, but one is opposite in direction from the other.
A polarizer (with its preferred direction rotated 30° to the vertical) is placed in a beam of unpolarized light of intensity 1. After passing through the polarizer, the beam's intensity is
A) 0.2501. B) 0.7501. C) 0.5001. D) 0.8661. E) 0.5000.
According to quantum physics, measuring the temperature of lava from a distant volcano by photographing its color with a telescopic camera measurably affects the lava's temperature
A) True B) False C) both of these depending on circumstances
Two isotopes have the same mass number
a. True b. False Indicate whether the statement is true or false