A 1000-kg car is moving at 15 km/h. If a 2000-kg truck has 23 times the kinetic energy of the car, how fast is the truck moving?
A) 51 km/h
B) 72 km/h
C) 61 km/h
D) 41 km/h
A
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Pressure in a Liquid: As shown in the figure, a large open tank contains a layer of oil (density 450 kg/m3) floating on top of a layer of water (density 1000 kg/m3) that is 3.0 m thick, as shown in the sketch. What must be the thickness of the oil layer if the gauge pressure at the bottom of the tank is to be 8.5 × 104 Pa?
Fill in the blank(s) with the appropriate word(s).
In their attempt to gauge the true shape of our Galaxy, the Herschels concluded that:
A) our Galaxy has a hexagonal shape. B) the Sun is the only luminous star in our Galaxy. C) the Sun and Earth are near the edge of our Galaxy. D) our Galaxy has some noticeable holes lacking stars around its edges.
The energy of position is called
a. potential energy. b. power. c. kinetic energy. d. heat.
4-Fluoroheptane and 5-fluoroheptane are
a. isomers. b. the same compound. c. neither isomers nor the same compound.