If 40 kcal of heat is added to 2.0 kg of water, what is the resulting temperature change?
A) 80C°
B) 60C°
C) 40C°
D) 20C°
E) 0.05C°
D
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A neutron star is
A) the remains of a star that died in a massive star supernova (if no black hole was created). B) the remains of a star that died by expelling its outer layers in a planetary nebula. C) a star made mostly of elements with high atomic mass numbers, so that they have lots of neutrons. D) an object that will ultimately become a black hole.
A campus bird spots a member of an opposing football team in an amusement park. The football player is on a ride where he goes around at angular velocity ? at distance R from the center. The bird flies in a horizontal circle above him. Will a dropping the bird releases while flying directly above the person's head hit him?
a. Yes, because it falls straight down. b. Yes, because it maintains the acceleration of the bird as it falls. c. No, because it falls straight down and will land behind the person. d. Yes, because it maintains the angular velocity of the bird as it falls. e. No, because it maintains the tangential velocity the bird had at the instant it started falling.
Which angle is the angle of incidence for the light ray shown approaching the plane mirror?
 a. 60° b. 30° c. neither d. eitherWhat type of eclipse can be observed when part of Earth is in the shadow of the Moon?