The specific heat of ice is about ________ the specific heat of liquid water
A) the same as
B) half
C) double
D) one tenth
E) 3 times greater than
B
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What was the purpose of the IAU establishing 88 official constellations?
a. To allow ancient stories of each constellation to be preserved b. To name all constellations the same across any culture c. To identify which constellation was created by which culture d. To define boundaries for constellations including every part of the sky e. To include additional, fainter stars within a constellation
By how much will mercury rise (or fall) in a 1.0 mm diameter glass tube (contact angle 140.°, Hg density 13.6 g/cc, surface tension 0.45 N/m)?
What will be an ideal response?
In a problem using energy considerations to solve for the speed of a ball thrown from the top of a building when it strikes the ground below, where should the potential energy have its zero value?
a. It should be at the level from where the ball is thrown. b. It should be at the ground level where the ball hits. c. It should be slightly below ground level so the potential energy is always positive. d. It doesn't matter since only differences in potential energy matter in solutions.
A baseball outfielder throws a baseball of mass 0.15 kg at a speed of 40 m/s and initial angle of 30°. What is the kinetic energy of the baseball at the highest point of the trajectory?