What happens to its moment of inertia when a steel disk is heated?
a. It increases.
b. It decreases.
c. It stays the same.
d. It increases for half the temperature increase and then decreases for the rest of the temperature increase.
a
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When discussing stellar lives, astronomers divide stars by mass into low-mass, intermediate-mass, and high-mass stars. Which category has the longest lifetimes?
A) low-mass stars B) intermediate-mass stars C) high-mass stars
A theory in the field of science is
A) an educated guess. B) less than a fact. C) a synthesis of a large body of well-tested knowledge. D) unchangeable.
If the Galactic Year is defined as the orbital period of the solar system, how long does it take us to circle the center? How do we know?
What will be an ideal response?
Two blocks, M = 2m, sit on a horizontal frictionless surface with a compressed massless spring between them