From Earth, the center of the Milky Way lies in the direction of the constellation Cygnus
Indicate whether the statement is true or false
FALSE
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A cubic box has sides of length 8.0 cm. What is the maximum number of pulverized spherical balls of diameter 1.5 cm that can fit inside the closed box (Vsphere = 4/3 ?r3)?
What will be an ideal response?
The critical angle for a substance in air is measured at 53.7°. If light enters this substance from air at 45.0° with the normal, at what angle with the normal will it continue to travel?
A) 34.7° B) 53.7° C) 45.0° D) It will not continue, but will be totally reflected.
A particle (m = 3.0 ?g, q = 5.0 ?C) moves in a uniform magnetic field given by (
) mT. At t = 0 the velocity of the particle is equal to (
) m/s. The subsequent path of the particle is
A. circular with a 50-cm radius. B. helical with a 6.3-cm pitch. C. circular with a period of 31 ms. D. helical with a 40-cm radius. E. none of the above
A plane is moving due north, directly towards its destination. Its airspeed is 220 mph. A constant breeze is blowing from west to east at 50 mph. How long will it take for the plane to travel 220 miles north?
a. one hour b. more than one hour c. less than one hour d. more information is needed e. none of the above