The Group 7A element astatine (85At) would be predicted to occur in what phase?
a. Liquid
b. Solid
c. Plasma
d. Gas
b
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_____, the largest of Saturn's moons, has an atmosphere composed mostly of nitrogen with traces of argon and methane
A) Ganymede B) Miranda C) Europa D) Titan
An aquarium contains a 5-cm layer of water (n = 1.33) floating on top of carbon tetrachloride (n = 1.461). If the angle of incidence into the water from the air is 30°, what is the angle of refraction into the carbon tetrachloride?
A. 58° B. 69° C. 37° D. 20° E. 75°
When a ray of light passes obliquely from one medium to another, which of the following changes?
A) direction of travel B) speed, direction of travel, but not wavelength C) wavelength D) wavelength, speed, & direction of travel E) speed
The principal axis is the
A) straight line drawn from the center of curvature to the mid point of the mirror. B) straight line drawn from the center of curvature to any point of the mirror. C) straight line drawn from the center of curvature to a point on the outer edge of the mirror. D) straight line joining any two points on the mirror. E) None of the other answers given is correct.