Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
In which material does light travel fastest?
A) glass
B) water
C) plastic
D) air
E) same for all
The reason a life jacket helps keep you afloat is
A) the jacket makes you weigh less.
B) the jacket has the same density as an average human.
C) the jacket repels water.
D) if you sink, the jacket sinks.
E) the density of both you and the jacket together is less than your density alone.
How many different kinds of elements are in a water molecule?
A) one
B) two
C) three
D) four
E) none
Cosmic rays originate in the
A) Earth's interior.
B) Earth's upper atmosphere.
C) Sun.
D) cosmos.
E) none of the above
Katelyn runs along the aisle of a train that moves at 8 m/s. Her speed relative to the
floor is 3 m/s. Her speed relative to an observer at rest on the ground is
A) 5 m/s.
B) 11 m/s.
C) either depending on her running direction
D) none of the above
Buoyant force is greater on a submerged
A) 1-kg block of lead.
B) 1-kg block of aluminum.
C) is the same on each
A car with closed windows makes a left hand turn. A helium-filled balloon in the car
moves to the
A) right.
B) left.
C) front.
D) back.
E) none of the above
A force is a vector quantity because it has both
A) magnitude and direction.
B) mass and velocity.
C) action and reaction counterparts.
D) speed and direction.
The Bernoulli effect causes passing ships to be drawn together when the ships are close
and moving in
A) the same direction.
B) opposite directions.
C) either of these
Over geologic history the Earth's magnetic field
A) has been relatively stable.
B) has increased in strength exponentially.
C) has reversed direction many times.
D) is unknown.
When the bottom string is pulled slowly in the heavy-ball-and-strings demonstration
(Figure 4.8 in your book), tension
A) in the top string is due to your pull plus the weight of the ball.
B) is about the same in both strings.
C) in the bottom string is zero.
While Debbie Diver holds her breath and swims deeper and deeper beneath the water's
surface, her density
A) increases.
B) decreases.
C) remains the same.
Two protons removed from an oxygen nucleus result in
A) nitrogen.
B) carbon.
C) helium.
D) neon.
E) positively charged oxygen.
When we see a half Moon in the sky, the lines between Earth, Moon, and Sun
A) are equal in length.
B) are parallel to one another.
C) form a right triangle.
D) all of the above
A torque acting on an object tends to produce
A) equilibrium.
B) rotation.
C) linear motion.
D) velocity.
E) a center of gravity.
No net force acts on a loop of wire in a magnetic field when
A) no current is in the loop.
B) no magnetic field lines pass through the loop.
C) both of these
D) neither of these
If electrons are stripped from an atom it becomes a
A) positive ion.
B) negative ion.
C) different element.
D) molecule.
Which of the following elements has the most mass?
A) hydrogen
B) iron
C) lead
D) uranium
E) all have the same mass
A circus diver drops from a high pole into water far below. When he is halfway down
A) his potential energy is halved.
B) he has gained an amount of kinetic energy equal to half his initial potential energy.
C) his kinetic energy and potential energy are equal.
D) all of the above
E) none of the above
A piano tuner knows that a key on the piano is tuned to the frequency of a test tuning
fork when the fork and key struck at same time produce beats of
A) 0 Hz.
B) 1 Hz.
C) 2 Hz.
D) 3 Hz.
E) 4 Hz.
A power line with a resistance of 2 ohms carries a current of 80 A. The power dissipated
in the line is
A) 40 W.
B) 160 W.
C) 320 W.
D) 12,800 W.
E) none of the above
What did Robert Brown see in his microscope?
A) straight-line motion
B) circular motions
C) parabolic motions
D) random motions
An astronaut floating alone in outer space throws a baseball. If the ball moves away at
20 m/s, the astronaut will
A) move in the opposite direction at 20 m/s.
B) move in the opposite direction at a lower speed.
C) move in the opposite direction at a higher speed.
D) none of the above
The first to be credited with the idea that light is quantized was
A) Max Planck.
B) Albert Einstein.
C) both Planck and Einstein at about the same time.
A column that extends from sea level to the top of the atmosphere contains a certain
mass of air. If the column instead contained the same mass of mercury, its height would
be about
A) 3/4 meter.
B) 10.3 meters.
C) 5.6 kilometers.
D) none of the above
A sound wave is a
A) longitudinal wave.
B) transverse wave.
C) all of the above
D) none of the above
When ice crystals form in clouds, the surrounding air
A) warms.
B) cools.
C) neither of these
The specific heat capacity is highest for substances that absorb or release large
quantities of heat for correspondingly
A) small temperature changes.
B) large temperature changes.
C) small or large changes in temperature.
D) none of the above
The radiation source closest to us originates in
A) medical treatments.
B) all kinds of power plants.
C) our own bodies.
D) none of the above
By adjusting a TV image with a remote you can
A) affect only the image.
B) participate with the action on the screen.
C) both of these
D) neither of these
What is the molecular mass of a water molecule?
A) 10 amu
B) 12 amu
C) 15 amu
D) 18 amu
E) none of the above
When light reflects from a surface, there is a change in its
A) frequency.
B) wavelength.
C) speed.
D) all of the above
E) none of the above
As water drops fall at a steady rate from a leaking faucet they
A) get closer together.
B) get farther apart.
C) remain at a relatively fixed distance from one another.
The force with which Earth pulls on the Moon is
A) somewhat greater than Moon's pull on Earth.
B) the only force acting between Earth and Moon.
C) equal in magnitude to the force that Moon pulls on Earth.
