What would happen if more mass was added to a 1.4-solar-mass neutron star?
A) It would blow off mass as an X-ray burster.
B) It would erupt as a Type I supernova.
C) It would grow larger, temporarily becoming a red giant again.
D) It could eventually become a black hole, via a hypernova explosion.
E) All of its protons and electrons would turn into quarks.
A
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A water line of 2 inch diameter is buried horizontally 4 feet deep in earth. Estimate the heat loss per foot from the water line if water at 50ºF flows through the line and the outside temperature of the line is assumed to be 50ºF. The surface temperature of the earth is -20ºF
What will be an ideal response?
Why does gravitational contraction halt in collapsing protostars?
What will be an ideal response?
Of the known planets in our solar system, the innermost is Mercury. When compared to the other planets in the system, Mercury has:
a. the greatest centripetal acceleration. c. the smallest speed. b. the greatest period of revolution. d. none of the above properties.
Equilibrium: As shown in the figure, a uniform rectangular crate 0.40 m wide and 1.0 m tall sits on a horizontal surface. The crate weighs 460 N, and its center of gravity is at its geometric center. A horizontal force of magnitude F is applied at a distance h above the floor. Friction at the floor is great enough to prevent the crate from sliding. If h = 0.69 m, what minimum value of F is required to make the crate start to tip over?
Fill in the blank(s) with the appropriate word(s).