Stars originate as large bodies of slowly rotating gas. Because of gravity, these clumps of gas slowly decrease in size. The angular velocity of a star increases as it shrinks because of
a. conservation of angular momentum
b. conservation of linear momentum
c. conservation of energy
d. the law of universal gravitation
e. conservation of mass
Question 2
A merry-go-round of radius R = 2.0 m has a moment of inertia I = 250 kgm2, and is rotating at 10 rpm. A child whose mass is 25 kg jumps onto the edge of the merry-go-round, heading directly toward the center at 6.0 m/s. The new angular speed (in rpm) of the merry-go-round is approximately
a. 10
b. 9.2
c. 8.5
d. 7.1
e. 6.4
Albatrosses brood young chicks until they are large enough to thermoregulate.
Several species of squirrels have melanistic phases. In large parts of United States and Canada, the
A star-forming region in the Large Magellanic Cloud.
Diverticulosis. It is the presence of abnormal pouches in the wall of the large intestine (diverticu
Pre–Main-Sequence Stars
To keep the foot under the center of gravity, the biped’s femur is angled from hip to knee. The quad