Temperature Scales: Platinum melts at 3215°F. What is the corresponding temperature in the Kelvin scale?
A. 2041 K
B. 2135 K
C. 2207 K
D. 2296 K
E. 3215 K
Answer: A
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A 10 kg ball weighs 98 N in air and weighs 75 N when submerged in water. The buoyant force of the water on the ball is
A. 32 N. B. 30 N. C. 24 N. D. 23 N. E. 19 N.
What was the conclusion of Feynman's first thought experiment regarding waves and particles, in which indestructible bullets are fired from a wobbly gun at a pair of slits?
a. When both slits are open, the total of bullets in this sand is the sum of bullets shot through one slit and the other. b. A bullet through one slit affects the probability that the next bullet goes through the same slit. c. Bullets rebounding from closed slits show refraction patterns. d. When both slits are open, interference patterns keep the number of bullets from reaching the full number shot one slit and then the other. e. Three times as many bullets go through two open slits as through one and then the other.
The Oort cloud extends to _____ from the Sun
A) 100 AU B) 1000 AU C) 10,000 AU D) 100,000 AU
A stone is thrown with an initial speed of 15 m/s at an angle of 53° above the horizontal from the top of a 40-m building. If g = 9.8 m/s2 and air resistance is negligible, then what is the magnitude of the vertical velocity component of the rock as it hits the ground?
a. 30 m/s c. 26 m/s b. 24 m/s d. 29 m/s