When monochromatic light illuminates a grating with 7000 lines per centimeter, its second order maximum is at 62.4°. What is the wavelength of the light?
A) 452 nm B) 336 nm C) 633 nm D) 752 nm E) 363 nm
C
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In a flat universe parallel lines
A) never converge. B) are concentric to each other. C) are mirror images. D) eventually meet.
What is Charon?
A) Pluto's largest moon B) the largest known asteroid C) the largest known comet D) one of the Galilean moons of Jupiter E) a moon of Neptune
A 12-g bullet moving horizontally strikes and remains in a 3.0-kg block initially at rest on the edge of a table. The block, which is initially 80 cm above the floor, strikes the floor a horizontal distance of 120 cm from its initial position. What was the initial speed of the bullet?
a. 0.68 km/s b. 0.75 km/s c. 0.81 km/s d. 0.87 km/s e. 0.41 km/s
Radio telescopes are _____
A) reflecting telescopes B) refracting telescopes C) infrared telescopes D) optical telescopes