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Two equal-size vectors at right angles to each other have a resultant that is
A) equal to that of either vector.
B) √2 the length of either vector.
C) twice the length of either vector.
The synthesis of a large collection of information that contains well-tested and verified
hypotheses about certain aspects of the world is known as a scientific
A) fact.
B) hypothesis.
C) law or principle.
D) theory.
E) none of the above
According to the "energy valley" of the mass-per-nucleon versus atomic-number graph,
the element with the least mass per nucleon is
A) hydrogen.
B) helium.
C) iron.
D) uranium.
E) none of the above
An element will decay to an element with higher atomic number in the periodic table if
it emits
A) a beta particle.
B) a gamma ray.
C) a proton.
D) an alpha particle.
E) none of the above
As you crawl toward the edge of a large freely-rotating horizontal turntable in a carnival
funhouse, the angular momentum of you and the turntable
A) decreases.
B) increases.
C) remains the same, but the revolutions per minute decrease.
D) decreases in direct proportion to your decrease in revolutions per minute.
E) none of these
A canteen that is wet on the outside results in water inside that is
A) warmer.
B) cooler.
C) both of these
D) neither of these
An object with twice as much mass as another object has twice as much
A) inertia.
B) speed.
C) acceleration due to gravity.
D) all of the above
An astronaut on another planet drops a 1-kg rock from rest and finds that it falls a
vertical distance of 2.5 meters in one second. On this planet, the rock has a weight of
A) 1 N.
B) 2 N.
C) 3 N.
D) 4 N.
E) 5 N.
Light of different colors in a glass prism travel at
A) different speeds.
B) the same speed.
C) the same speed in prisms and all materials.
All deposits of natural uranium contain appreciable amounts of
A) iron.
B) lead.
C) gold.
D) all of the above
E) none of the above
A partial solar eclipse occurs for people in the Sun's
A) umbra.
B) penumbra.
C) none of these
Compared with a solid steel bar having a rectangular cross-section, an I-beam has the
advantage of
A) being lighter.
B) being stronger per bodyweight.
C) both of these
D) neither of these
Which of these is not a form of solar energy?
A) wind energy
B) fossil fuel energy
C) geothermal energy
D) hydroelectric power
You're at rest in a hammock when a hungry mosquito sees an opportunity for lunch. A
mild 2-m/s breeze is blowing. If the mosquito joins you for lunch it should hover over
you by flying
A) against the breeze at 2 m/s.
B) with the breeze at 2 m/s.
C) a bit faster than wind speed.
D) none of the above
When U-239 emits a beta particle, the resulting nucleus has
A) 90 protons.
B) 91 protons.
C) 92 protons.
D) 93 protons.
E) 94 protons.
Superconductors most often require
A) low operating temperatures.
B) high operating temperatures.
C) magnets.
Two life preservers have identical volumes, but one is filled with Styrofoam while the
other is filled with sand. When the two life preservers are fully submerged, the buoyant
force is greater on the one filled with
A) Styrofoam.
B) sand.
C) same on each as long as their volumes are the same
Compared to a single lamp connected to a battery, two lamps connected in parallel to
the same battery will carry
A) more current.
B) less current.
C) the same current.
In both fission of uranium and fusion of hydrogen, mass
A) decreases.
B) remains constant.
C) increases.
The force of friction on a sliding object is 10 N. The applied force needed to maintain a
constant velocity is
A) more than 10 N.
B) less than 10 N.
C) 10 N.
A vertically-held sledge hammer is easier to balance when the heavier end is
A) on your hand.
B) at the top, away from your hand.
C) same either way
The greater the temperature difference between input and output reservoirs of a heat
engine, the
A) greater the efficiency.
B) smaller the efficiency.
C) both of the above
D) none of the above
Waves diffract the most when their wavelength is
A) short.
B) long.
C) both of these
D) neither of these
If an elephant grows proportionally to twice its height, the area of its ears would be
about
A) twice.
B) four times more.
C) six times more.
D) eight times more.
E) none of the above
The secondary of a transformer is the coil connected to
A) the load.
B) the Internet.
C) the input power line.
D) none of the above
Fraunhofer lines are apparent in
A) absorption spectra.
B) emission spectra.
C) Doppler shifts.
D) a variety of energy levels.
E) none of the above
When an object is partly or wholly immersed in a liquid, it is buoyed up
A) by a force equal to its own weight.
B) by a force equal to the weight of liquid displaced.
C) and floats in accord with Archimedes' principle.
D) all of the above
E) none of the above
A hunter on level ground fires a bullet at an angle of 10 degrees above 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.
How many colors of ink are used to print full-color pictures?
A) one plus black
B) two plus black
C) three plus black
D) four plus black
E) six plus black
Plutonium is extremely rare in natural ore deposits because it
A) is artificially created.
B) is chemically inert.
C) is a gas at room temperature.
D) has a tiny half-life compared with the age of Earth.
E) none of the above
In the field induction credited to Maxwell, wires
A) can be insulated or non-insulated.
B) are minimized.
C) are not needed.
