This figure shows an airplane traveling east to west along Earth's equator at the same speed that Earth rotates from west to east. People on Earth would, of course, simply see the airplane fly westward at 1,670 km/hr. What is the significance of the difference in viewpoints between people on Earth and people on the Moon?
A) It shows that motion is relative not absolute.
B) It shows that you can get a wrong answer if you don't view the situation from the correct perspective.
C) It shows that the airplane is traveling in a direction opposite to Earth's rotation.
D) It shows that airplanes can move quite fast if you view them from the right place.
A) It shows that motion is relative not absolute.
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Ideal Gas Law: Originally 2.00 mol of gas are at STP. If the temperature changes to 47.0°C and the pressure decreases to half of what it was, how many liters do the two moles now occupy? (1 atm = 101 kPa, R = 8.31 J/mol ? K)
Fill in the blank(s) with the appropriate word(s).
The point P lies along the perpendicular bisector of the line connecting two long straight wires S and T perpendicular to the page. A set of directions A through H is shown next to the diagram. When the two equal currents in the wires are directed into the page, the direction of the magnetic field at P is closest to the direction of
a.
A
b.
B.
c.
C.
d.
D.
e.
E.
Your feet feel warmer on a rug than on a tile floor because the rug
a. is usually warmer than the tile b. is a better insulator than tile c. has more internal energy than tile for the same mass d. all of these
A 1.53-kg bucket hangs on a rope wrapped around a pulley of mass 7.07 kg and radius 66 cm. This pulley is frictionless in its axle, and has the shape of a solid uniform disk
After the bucket has been released, (a) what is the angular acceleration of the pulley, and (b) what is the acceleration of the bucket?