A rock is thrown straight up with an initial velocity of 25.0 m/s. What maximum height will the rock reach before starting to fall downward? (Take acceleration due to gravity as 9.80 m/s2.)
a. 39.9 m
b. 15.9 m
c. 63.8 m
d. 31.9 m
e. 47.8 m
d
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Diffraction Gratings: In a diffraction grating experiment, light of 600 nm wavelength produces a first-order maximum 0.35 mm from the central maximum on a distant screen. On the same screen, a second monochromatic source produces a third-order maximum 0.87 mm from the central maximum when it passes through the same diffraction grating. What is the wavelength of the light from the second source?
Fill in the blank(s) with the appropriate word(s).
Type II supernovae and star forming regions are related to one another because:
A) they both contain ionized hydrogen. B) they both involve high mass ionizing stars. C) the shock waves of a supernova can trigger star formation. D) as a result of both processes, lighter elements are transformed into heavier elements. E) All of the above.
Discuss the source of energy for a star like the Sun when it is on the Main Sequence. Include the role of nuclear, electrical, and gravitational forces, temperature, and chemical composition
How long can this star burn its fuel and what marks the end of this stage of its life?
A gyroscope consists of a wheel mounted on an axle aligned along a north-south direction. The south end of the axle is suspended by a rope attached to the ceiling, and the north end is manually held at rest. The wheel is spinning rapidly, so that its angular momentum vector points north. Suddenly the north end is released. Since there is spin, the north end of the axle will begin to move
A. west. B. north. C. south. D. east. E. down.