The majority of galaxies in the local group are irregulars and small ellipticals. This fact proves that the majority of galaxies in the Universe are of the irregular or small elliptical type.
Answer the following statement true (T) or false (F)
False
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A proton moves around a circular path (radius = 2.0 mm) in a uniform 0.25-T magnetic field. What total distance does this proton travel during a 1.0-s time interval? (m = 1.67 × 10?27 kg, q = 1.6 × 10?19 C)
A. 82 km B. 59 km C. 71 km D. 48 km E. 7.5 km
One problem with the planetary model of the atom is that it
A) cannot explain boiling, freezing, and other transitions between the three common states of matter. B) cannot explain electrical effects. C) cannot explain the observed spectrum of the various types of atoms.
The velocity of a body is graphed as a function of time. The slope of the graph at any point may be identified with
A. instantaneous speed. B. average velocity. C. average acceleration. D. instantaneous velocity. E. instantaneous acceleration.
Two identical balls are at rest and side by side at the top of a hill. You let one ball, A, start rolling down the hill. A little later you start the second ball, B, down the hill by giving it a shove. The second ball rolls down the hill along a line parallel to the path of the first ball and passes it. At the instant ball B passes ball A:
a. it has the same position and the same velocity as A. b. it has the same position and the same acceleration as A. c. it has the same velocity and the same acceleration as A. d. it has the same displacement and the same velocity as A. e. it has the same position, displacement and velocity as A.