What is the highest order (m value) maximum for wavelength 450 nm that can be obtained with a grating with 300 lines per mm?
a. 8
c. 7
b. 3
d. 4
C
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A giant star in another galaxy exploded 67 million years ago, forming a supernova. The event is observed by an astronomer on Earth
Estimate the speed at which the supernova (and its galaxy) recedes from Earth if the Hubble constant is 22 km/s per million light-years. (c = 3.00 × 108 m/s, 1 ly = 9.461 × 1015 m, 1 y = 3.156 × 107 s) A) 4700 km/s B) 2700 km/s C) 1500 km/s D) 1200 km/s E) 670 km/s
How much energy is released by a nuclear reactor if the total mass of the fuel decreases by 1.0 g?
A. 
B. 
C. 
D. 
You stand near the earth's equator. A positively charged particle that starts moving parallel to the surface of the earth in a straight line directed east is initially deflected upwards. If you know there are no electric fields in the vicinity, a possible reason why the particle does not initially acquire a downward component of velocity is because near the equator the magnetic field lines of the
earth are directed a. upward. b. downward. c. from south to north. d. from north to south. e. from east to west.
Two stars of masses M and 6M are separated by a distance D. Determine the distance (measured from M) to a point at which the net gravitational force on a third mass would be zero
a. 0.41 D b. 0.33 D c. 0.37 D d. 0.29 D e. 0.14 D