A hole is punched in a full milk carton, 10 cm below the top. What is the initial velocity of outflow?
a. 1.4 m/s
b. 2.0 m/s
c. 2.8 m/s
d. 3.9 m/s
e. 4.2 m/s
a
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Work-Energy Theorem: Three cars (car L, car M, and car N) are moving with the same speed and slam on their brakes. The most massive car is car L, and the least massive is car N. If the tires of all three cars have identical coefficients of kinetic friction with the road surface, for which car is the amount of work done by friction in stopping it the greatest?
A. The amount of work done by friction is the same for all cars. B. Car L C. Car M D. Car N
In a large tank of liquid, the hydrostatic pressure at a given depth is a function of:
a. depth. c. liquid density. b. surface area. d. Choices a and c are both valid.
How do the jovian planet interiors differ?
A) All have about the same amount of hydrogen and helium but the proportion of rocks is greater in those planets closer to the Sun. B) All have cores of about the same mass, but differ in the amount of surrounding hydrogen and helium. C) The composition changes from mostly ammonia in Jupiter and Saturn to mostly methane in Uranus and Neptune. D) The composition changes from mostly hydrogen in Jupiter and Saturn to mostly helium in Uranus and Neptune. E) The core mass decreases with the mass of the planet.
Some 10 solar mass main-sequence stars have much shorter lifetimes than other 10 solar mass main-sequence stars
Indicate whether the statement is true or false