Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
Electric resistance in our skin is lowered when our skin is
A) moist.
B) dry.
C) none of the above
If a gram of antimatter meets a kilogram of matter, the amount of mass to survive is
A) 1 gram.
B) 999 grams.
C) 1 kilogram.
D) 1.1 kilogram.
Relative to an initial height, an object raised twice as high has a gravitational potential
energy
A) half as much
B) twice as much.
C) four times as much.
D) need more information
When the potential energy of a satellite decreases
A) kinetic energy also decreases.
B) its kinetic energy correspondingly increases.
C) its distance from the orbiting body increases.
D) none of the above
When a mirror with a fixed beam on it is rotated through a certain angle, the reflected
beam is rotated through an angle that is
A) equal to the angle of rotation.
B) twice as large.
C) four times as large.
D) none of these
The water that operates a fission-reactor turbine is
A) not the same water that flows through the reactor.
B) heated to high-pressure steam.
C) without radioactivity.
D) all of the above
E) none of the above
A projectile that is fired vertically from the surface of Earth at 8 km/s will
A) go into circular orbit about Earth.
B) rise and fall back to Earth's surface.
C) follow an uncertain path.
D) escape from Earth.
Light shines on a pane of green glass and a pane of clear glass. The temperature will be
higher in the
A) clear glass.
B) green glass.
C) both the same
An object falls freely from rest on a planet where the acceleration due to gravity is 20
m/s2. After 5 seconds, the object will have a speed of
A) 5 m/s.
B) 10 m/s.
C) 20 m/s.
D) 50 m/s.
E) 100 m/s.
Doubling the linear size of an object multiplies its area by
A) 2 and its volume by 4.
B) 4 and its volume by 8.
C) 8 and its volume by 16.
D) none of the above
Nuclear stability is related to the balance between
A) attracting and repelling forces in the nucleus.
B) positive and negative ionic forces.
C) both of these
D) neither of these
Steam burns are more damaging than burns caused by boiling water because steam
A) has more energy per gram than boiling water.
B) releases additional energy when it condenses.
C) both of these
D) neither of these
When a volume of air is compressed, air temperature
A) increases.
B) decreases.
C) neither of these
Double the frequency of a musical note and you halve its
A) wavelength.
B) speed.
C) amplitude.
D) all of the above
E) none of the above
Which of these has the greatest mass?
A) proton
B) electron
C) both of these
D) neither of these
Several paper clips dangle from the north pole of a magnet. The induced pole in the
bottom of the lowermost paper clip is a
A) north pole.
B) south pole.
C) either of these
D) neither of these
When taking a photo of a nearby flower, your camera lens should be set
A) closer than one focal length from the photosensitive surface.
B) farther than one focal length from the photosensitive surface.
C) to one focal length from the photosensitive surface.
As the sloped surface supporting a shoe becomes steeper
A) the shoe's weight mg remains unchanged.
B) the normal force becomes less.
C) friction needed to keep it at rest increases.
D) all of the above
E) none of the above
The greater the frequency of the illuminating light on a photosensitive surface, the
greater the
A) number of ejected electrons.
B) velocity of ejected electrons.
C) both of these
D) neither of these
Assuming no change in temperature, as a freely expanding helium-filled balloon rises in
the atmosphere, the buoyant force acting on it
A) increases.
B) decreases.
C) remains nearly the same.
Arnold Strongman and Suzie Small each pull very hard on opposite ends of a rope in a
tug-of-war. The greater force on the rope is exerted by
A) Arnold, of course.
B) Suzie, surprisingly.
C) both the same, interestingly.
If the rotational speed of a rotating habitat in space increases, the weight experienced by
occupants
A) decreases.
B) stays the same.
C) increases.
D) is always zero.
In the process of fluorescence, part of the input energy immediately
A) becomes internal energy with the rest as lower-frequency light.
B) cascades to excite other atoms in the material.
C) is emitted as higher-frequency light and the rest as lower-frequency light.
D) excites electrons to metastable states.
E) none of the above
When an element undergoes nuclear transmutation, the result is a completely different
A) isotope of the same element.
B) ion of the same element.
C) element.
The tangential velocity of an Earth satellite is its velocity
A) parallel to the surface of Earth.
B) perpendicular to the surface of Earth.
C) attributed to satellites moving in any direction.
The factor most directly responsible for making a black hole invisible is its
A) size.
B) mass.
C) color.
D) surface escape velocity.
E) none of the above
About 40 J is required to push a crate 4 m across a floor. If the push is in the same
direction as the motion of the crate, the force on the crate is about
A) 4 N.
B) 10 N.
C) 40 N.
D) 160 N.
Rapid change of a magnetic field induces
A) a magnetic field of greater magnitude.
B) a magnetic field of the same magnitude.
C) an electric field.
Which is the most abundant greenhouse gas in Earth's atmosphere?
A) nitrogen.
B) water vapor.
C) carbon dioxide.
D) none of the above
Electrons with greater potential energies relative to the atomic nucleus are
A) inner electrons.
B) outer electrons.
C) both the same
The brakes of a speeding truck are slammed on and it skids to a stop. If the truck were
heavily loaded so that it had twice the total mass, the skidding distance would be
A) half as far.
B) 1.5 times as far.
C) twice as far.
D) 4 times as far.
E) the same.
