The Coriolis force affects tornadoes by:
a. making them spin clockwise in the Northern Hemisphere.
b. making them always spin to the left.
c. making them always spin to the right.
d. making them spin in the same direction regardless of where they are on the Earth's surface.
e. making them spin in one direction in the Northern Hemisphere and in the opposite direction in the Southern Hemisphere.
[Ques. 2] What causes the Coriolis force?
a. The increase in the speed the surface you stand on moves as you increase the radius on a rotating platform.
b. The tendency to continue moving in a straight line on a rotating platform.
c. The outward force of rotation on a moving platform.
d. The force exerted by the platform to keep you moving when stay at the same radius.
e. The reaction force that acts on you from the rotating platform.
[Ques. 3] Foucault's pendulum:
a. continues to swing back and forth in the same fixed direction relative to the ground.
b. keeps swinging faster because the centrifugal force of Earth's rotation affects its weight.
c. changes how far it goes on each swing because of Earth's motion around the Sun.
d. changes the direction of its back and forth swing because Earth rotates beneath it.
e. changes the direction of its back and forth swing because of gravity.
[Ques. 4] What is parallax?
a. Two lines in the same plane that never meet.
b. The way an object looks the same regardless of the observer's location.
c. The change in apparent relative positions of different parts of an object when seen from different angles.
d. The arrangement of two parts of an object so that one is always seen as directly in front of the other.
e. Two lines that cross.
[Ques. 5] The Copernican (heliocentric) model explained things better than the Ptolemaic (geocentric) model, except:
a. it did not explain the relative positions of stars as seen from Earth at different times of year.
b. it did not explain why Mercury is always near the Sun.
c. it was conceptually more complex than the Ptolemaic model.
d. it did not explain planetary motion clearly.
e. it required a great deal more mathematical calculation.
[Ques. 6] What is the heliocentric model?
a. The system that Ptolemy used to describe the motion of heavenly bodies seen in the sky.
b. A system in which Earth and its moon and the known planets move around the Sun.
c. A system in which neither the Earth nor the Sun move.
d. A system in which the stars move around the Earth and the Sun together.
e. A system in which the Sun moves around the Earth.
[Ques. 7] If you feel a centrifugal force pulling you to the outside of a rotating circular wall:
a. you are correct about what is happening.
b. the circular wall actually is pushing on you.
c. you are experiencing a linear force.
d. the centripetal force inward balances the centrifugal force outward, and you feel no net force.
e. you are only experiencing half of what is happening; you are being pulled to the outside of the circle and the outside of the circle is also pushing on you.
[Ques. 8] This photo shows a carnival ride called a Rotor. If you had a second Rotor that spins at the same rate as the one pictured, but has a smaller diameter, the centripetal force on the people by the wall would be: (Hint: This is similar to the space station discussed at the bottom of page 168.)
a. larger than the centripetal force in the Rotor pictured.
b. the same as the centripetal force in the Rotor pictured.
c. smaller than the centripetal force in the Rotor pictured.
[Ques. 9] In this figure, a cork attached to a string floats in an inverted jar filled with water. Compare the cork to a helium balloon attached to a car seat. (See the Physics on Your Own box on page 164 of your textbook). As the jar shown here is accelerated, you would expect the cork to behave:
a. similar to the balloon in an accelerating car.
b. the opposite of the helium balloon in an accelerating car.
c. in a way that is unrelated to the balloon.
[Ques. 10] Inside a space station in orbit around Earth:
a. there is no gravity because of the height of the station far above Earth.
b. there is no gravity because the station is in orbit.
c. gravity appears absent because everything is moving and accelerating together.
d. objects have no mass because they are in orbit.
e. gravitational effects feel the same as on Earth.
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