A 65-g handball is dropped to the floor from a height of 1 m, and bounces to a height of 0.80 m. What is the magnitude of the impulse received by the ball from the floor?
A)
0.030 N s
B)
0.13 N s
C)
0.55 N s
D)
0.30 N s
E)
0.013 N s
C
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Hot gas created during the big bang should be detectable becausethe ____
a. gas has traveled with galaxies as they formed and is spread through the Universe of the present day b. big bang occurred everywhere at once, and should be visible in any direction at long look-back times c. big bang occurred in a certain location, and the radiation from the gas is concentrated there d. gas has travelled to the edges of the Universe and will be visible at negative redshifts e. radiation emitted by the gas has travelled at the same speed as the expanding Universe and is visible all around us
The very first generation of star systems in the universe must have been born from gas that consisted entirely of hydrogen and helium (and no other elements). Which of the following statements is most likely to have been true about these first-generation star systems?
A) They had terrestrial planets but no jovian planets. B) They did not have any planets or asteroids or comets. C) They had asteroids and comets but no large planets. D) They did not have and disks of gas around them as they formed.
The speed of light is given by the value of
A.
B.
.C.
.D.
.E.
.For n = 5, how many allowed values are possible for the orbital quantum number and the orbital magnetic quantum number?
a. 5, 11 c. 5, 9 b. 6, 12 d. 4, 9