According to the uncertainty principle, halving the uncertainty in position is accompanied by __________ the minimum uncertainty in momentum.
A. halving
B. quartering
C. doubling
D. quadrupling
E. no change in
C. doubling
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An 05 star has an H? line present in its spectra. What color is the line?
a. red b. no color as the line is in the UV band c. blue d. no color as the line is in the infrared band
Can the total mechanical energy E = KE + PE ever be negative ?
A. Yes, always. B. Yes, because KE can be negative. C. Yes, because PE can be negative. D. No.
The thermal pressure of a gas depends on
A) density only. B) temperature only. C) density and temperature. D) composition. E) gravity.
Jason takes off from rest across level water on his jet-powered skis. The combined mass of Jason and his skis is 75 kg (the mass of the fuel is negligible). The skis have a thrust of 200 N and a coefficient of kinetic friction on water of 0.10
Unfortunately, the skis run out of fuel after only 67 s. How far has Jason traveled when he finally coasts to a stop? A) 5400 m B) 3800 m C) 10,000 m D) 7600 m