In the color wheel shown below, which colors are the cool colors?
A. red, yellow, blue
B. orange, green, purple
C. green, blue, purple
D. yellow, orange, red
Answer: C
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The standard model of particle physics predicts the existence of three families of elementary particles with four particles in each family. All of these particles have been confirmed experimentally except for the tau neutrino. Most physicists think the reason it has not been found is that
A. it likely does not exist. B. it is associated with the tau particle and the tau is difficult to trap. C. no current particle accelerator can generate enough energy to create a tau neutrino. D. neutrinos are very difficult to detect.
Mercury, with a higher eccentricity orbit, should change its orbital speed more than do Venus or Earth
Indicate whether the statement is true or false
In a capacitor in an AC circuit, the voltage:
a. leads the current by 90°. b. lags the current by 90°. c. may lead or lag the current depending on the frequency. d. is in phase with 70.7% of the current.
Suppose you want to set up a simple pendulum with a period of 0.250 s
(a) What length is required if g = 9.80 m/s2 on Earth? (b) What length would be required on the moon assuming g is 6 (assume exact) times LESS than on Earth?