Chinook winds tend to
A) warm an environment.
B) cool an environment.
C) cool deserts at night.
D) warm deserts at sunrise.
What does c2 have in common with γ?
A) they are both proportionality constants
B) they have similar numerical values
C) they both involve different kinds of speed
D) all of the above
The mass of a ball moving at 3 m/s with a momentum of 48 kg m/s is
A) 4 kg.
B) 12 kg.
C) 16 kg.
D) 144 kg.
E) none of these
When the hydrogen isotope tritium-3 emits a beta particle, it becomes an isotope of
A) hydrogen.
B) helium.
C) lithium.
D) carbon.
E) none of the above
A river 100 m wide flows due south at 1 m/s. A boat that goes 1 m/s relative to the
water leaves the west bank. To land at a point due east of its starting point, the boat
must be pointed
A) northeast.
B) east.
C) southeast.
D) nowhere”it can’t be done.
Two charged particles attract each other with a force F. If the charges of both particles
are doubled, and the distance between them also doubled, then the force of attraction
will be
A) F.
B) 2 F.
C) F/2.
D) F/4.
E) none of the above
Radiation dosages based on potential damage is in
A) rads.
B) rems.
C) joules.
D) none of the above
The electrical force is stronger between the nucleus and an inner electron for atoms of
A) low atomic number.
B) high atomic number.
C) both of these
D) neither of these
A total solar eclipse occurs for people in the Sun’s
A) umbra.
B) penumbra.
C) none of these
A scuba diver losing her air supply while far beneath the water surface is advised when
ascending to
A) hold air in her lungs.
B) allow air to escape her lungs.
C) panic.
A hollow spherical planet is inhabited by people who live inside it, where the
gravitational field is zero. When a very massive spaceship lands on the planet’s surface,
inhabitants find that the gravitational field inside the planet is
A) still zero.
B) non-zero, directed toward the spaceship.
C) non-zero, directed away from the spaceship.
An atom is excited when one or more of its electrons
A) vibrates.
B) is boosted into higher energy levels.
C) undergoes a frequency change.
D) becomes frantic.
When a pair of 1-ohm resistors are connected in series, their equivalent (combined)
resistance is 2 ohms, and when connected in parallel is
A) ohm.
B) none of the above
C) also 2 ohms.
A stable electron orbit cannot exist if its circumference is
A) a single wavelength.
B) 2 wavelengths.
C) 2.5 wavelengths.
D) any of the above
E) none of the above
If the primary of a transformer is connected to a dc power source, the transformer
would have a voltage output
A) at a higher efficiency than with an ac source.
B) the same.
C) that is also dc.
D) only while being connected or disconnected.
E) none of the above
Two people are balanced on a seesaw. If one person leans inward toward the center of
the seesaw, that person’s end of the seesaw tends to
A) rise.
B) fall.
C) stay at the same level.
D) need more information
By casually glancing at a scene on your TV you are
A) affecting the image.
B) participating in the action on the screen.
C) both of these
D) neither of these
The number of electrons delivered daily to an average American home by an average
power utility in the early 21st century was
A) zero.
B) 110.
C) 220.
D) billions of billions.
E) none of the above
When you flick a card from beneath a coin that hardly moves, you’re illustrating
A) inertia.
B) equilibrium.
C) support force.
D) friction.
A negatively-charged rod is held near an aluminum can that rests on a dry wood table.
If you momentarily touch the opposite side of the can with your finger, the can becomes
A) positively charged.
B) negatively charged.
C) partially discharged.
D) completely discharged.
E) none of the above
If molecules in the sky scattered orange light instead of blue light, sunsets would be
colored
A) orange.
B) yellow.
C) green.
D) blue.
E) none of the above
Compared to the mass of a hydrogen atom, the mass of an oxygen atom is
A) 8 times as great.
B) 12 times as great.
C) 16 times as great.
D) appreciably more than 16 times as great.
The strength of a rope depends on its
A) thickness.
B) length.
C) both of these
Compared with the buoyant force of the atmosphere on a 1-liter helium-filled balloon,
the buoyant force of the atmosphere on a nearby 1-liter solid iron block is
A) considerably less.
B) considerably more.
C) the same.
A hunter on level ground fires a bullet at an angle of 10 degrees below the horizontal
while simultaneously dropping another bullet from the level of the rifle. Which bullet
will hit the ground first?
A) the one dropped
B) the one fired
C) both hit at the same time.
Airplane flight best illustrates
A) Archimedes’ principle.
B) Pascal’s principle.
C) Bernoulli’s principle.
D) Boyle’s law.
A partial solar eclipse occurs for people in the Sun’s
A) umbra.
B) penumbra.
C) none of these
A beam of electrons has
A) wave properties.
B) particle properties.
C) both of these
D) neither of these
To melt ice, add
A) temperature.
B) energy.
C) force.
D) time.
The uncertainty principle tells us that the more information one has about the energy of
an electron, the less certain one is about
A) its position.
B) the time it has that energy.
C) both of these
D) neither of these
The toy drinking bird nicely illustrates
A) evaporation.
B) condensation.
C) both of these
D) neither of these
A key feature of the Falkirk Wheel in Scotland is that opposite gondolas have the same
weight when both are brim-full of water
A) and boats in each have about equal weights.
B) and at least one boat is in each gondola.
C) regardless of the weights of boats or no boats in each.
D) none of the above