Physics

The process of evaporation occurs • View Available Hint(S) O at the bottom of the liquid at the surface of the liquid everywhere in the liquid only within the liquid

At the surface of the liquid

When a pot of water is being heated in a cookstove, what process takes the heat from the bottom of the pot to the surface of the water? • View Available Hint(s) • Convection • Conduction • Heat O Radiation

Convection

Newton's law of cooling applies to objects that undergo • only warming only cooling cooling or warming neither cooling nor warming

Cooling or warming

What happens to the current in a circuit where the resistance is kept constant and the voltage is double? • View Available Hint(s) • Current also doubles. • Current will increase. • Current stays the same. • Current will be cut in half.

Current also doubles

Condensation is a change of phase from gas to liquid • from liquid to gas • without energy transfer • from solid or liquid to gas

From gas to liquid

A voltage source in a circuit provides electrical • View Available Hint(s) O force • resistance • pressure • grounding

Pressure

Which of these has the highest specific heat capacity? © Water O Soil O Iron O Silver

Water

How do you compare the charge of the electron versus the charge of the proton? • View Available Hint(s) • They have different magnitudes and signs. • The electron has a lower magnitude of the charge, but the same sign. • They are the same charge. • The same magnitude, but opposite signs.

the same magnitude but opposite signs

Escape speed from Earth is any speed equal to or greater than • 5 km/s • 9 km/s • 11.2 km/s • 620 km/s

11.2km/s

An electric field is induced by. • View Available Hint(s) • a constant magnetic field O a magnetic pole • an electric charge © a changing magnetic field

A changing magnetic field

Faraday's law states that induced voltage in a loop of wire depends upon the rate at which • View Available Hint(s) current is made to oscillate within the loop O a magnet is thrust into the loop • a magnetic field in the loop changes voltage changes

A magnetic field in the loop

An electric field is • View Available Hint(s) a vector quantity O a source of voltage • an invisible force • the same as a gravitational field

A vector quantity

Heat always flows spontaneously from • View Available Hint(s) • a hot object to another hot object a cooler to a warmer object a warmer to a cooler object any object to another

A warmer to a cooler object

The vibrations along a longitudinal wave move in a direction • View Available Hint(s) along and parallel to the wave • neither along nor perpendicular to the wave • both along and perpendicular to the wave perpendicular to the wave

Along and parallel to the wave

Atmospheric pressure decreases with increasing • View Available Hint(s) • temperature speed of molecules in the air amounts of sunshine altitude

Altitude

To double the rotational speed the centripetal force must . double • stay the same . increase . be four times larger

Be four times larger

Boiling is evaporation that mainly occurs • at the bottom of a container of heated water • when water becomes overly hot at the surface of water below the surface and throughout water

Below the surface and throughout water

Compare the age of the atoms in your body with the age of the atoms that were part of the dinosaurs. • They are the same atoms • Humans atoms are older. ) Both are ageless. • Dinosaurs atoms are older.

Both are ageless

A wave is a periodic vibration in • View Available Hint(S) both space and time • three dimensions • time space

Both space and time

Electric charge can be transferred from one conducting body to another • View Available Hint(s) • by both contact and closeness • only by contact • by no means, for charge is conserved • only by closeness without touching

By both contact bank and closeness

The inside surface of a glass window becomes wet when the temperature outside is • View Available Hint(S) warmer colder either warmer or colder almost exactly the same as on the inside

Colder

The mass of an atom is • mostly electrons • very, very small concentrated in the atomic nucleus • impossible to calculate

Concentrated in the atomic nucleus

pressure increases on a block resting on a table when you increase the downward force and surface area downward force on the block surface area density of the block

Downward force on the block

Earth's gravitational field is strongest at Earth's surface • Earth's center • either the Earth's center or at its surface infinity, in principle

Earths surface

What type of field or fields surround a moving electron? • View Available Hint(S) • Electric field only Electric field and magnetic field • Magnetic field only • No fields surround the charge

Electric field and magnetic field

The source of a magnetic field is a moving • View Available Hint(s) • magnetic north pole only O magnetic north or south pole • magnetic south pole only electron

Electron

Kepler was the first to be credited for discovering that planets follow • parabolas curved paths I circular paths elliptical paths

Elliptical paths

What travels in a wave from one location to another is • View Available Hint(S) O wavelength • amplitude • frequency energy

Energy

Evaporation is a change of phase from gas to liquid • from solid or liquid to gas • without energy transfer • from liquid to gas

From liquid to gas

Water pressure in a lake is • the same at any point greater at the surface greater at the bottom greater midway to the bottom

Greater at the bottom

An important feature of atoms is that they have wave properties can barely be seen with the naked eye make up electric beams are actually tiny solar systems

Have wave properties

The relation /~ Ttells us that high temperature sources emit electromagnetic waves of. • View Available Hint(s) long wavelengths high frequency • high penetrating power O low frequency

Hugh frequency

The purpose of a pressure cooker is to increase the boiling temperature O quicken heating lengthen the time of cooking • lessen pressure while cooking

Increase the boiling temperature

A gas will become plasma when it. • View Available Hint(s) • fluoresces O is fused O is cooled • is electrically charged

Is electrically charged

The rotational speed of every point of a rotating rigid object • is zero • is tangent to the circular motion • depends on the distance to the axis of rotation . is the same

Is the same

A loaded ship arrives at the first freshwater lock of the Panama Canal, will it float higher or lower than in the open oceans It will float lower. • I need to know the weight of the ship to answer. • It will float at the same level. • It will float higher.

It'll flow lower

Hot sand cools off faster at night than plants and vegetation. This indicates that the specific heat capacity for sand is • View Available Hint(s) • likely the same as that of plants unrelated to the rate of cooling • less than that of plants more than that of plants

Less than that of plants

An object having the same density as water will sink in water • float on water • displace less weight in water than it weighs neither sink nor float in water

Neither sink nor float

The vibrations along a transverse wave move in a direction perpendicular to the wave • both along with and perpendicular to the wave neither along with nor perpendicular to the wave along the wave

Perpendicular to the wave

The work done to separate opposite charges results in different values of energy per charge. What is this difference called? • Resistance • Potential difference or voltage • Force • Current

Potential difference or voltage

Boiling can occur in cold water when sub-zero temperatures are achieved pressure is sufficiently lowered • pressure is sufficiently increased concentration and physics come together

Pressure is sufficiently lowered

Heat travels from the Sun to Earth by the process of • View Available Hint(s) convection conduction and convection, though radiation is greater radiation O conduction

Radiation

Solar power is the rate at which • View Available Hint(s) • radiant energy is radiated by Earth radiation attenuates in the atmosphere solar cells convert sunlight into electricity • solar energy is received from the Sun

Solar energy is received from the sun

Kepler discovered that a planet moving in an elliptical orbit will move with the same acceleration cover equal distances sweep equal areas of space move with the same velocity

Sweep equal areas of space

What happens to the force between two charges if they are moved to three times the distance? • View Available Hint(S) © The force decreases nine times. • The force decreases three times. • The force increases nine times. • The force increases three times.

The force decreases nine times

Compared to hydrogen (atomic number 1), the helium atom (atomic number 2) has double the positive charge in the nucleus. How do you compare their relative sizes? • We don't know anything about their sizes. • The helium atom is smaller than the hydrogen atom. • They have the same size. • The hydrogen atom is smaller than the helium atom.

The helium atom is smaller than the hydrogen atom

The magnitudes of the energy changes during evaporation and condensation are • View Available Hint(S) the same • different O zero not related

The same

Two isolated charges repel each other when approached. What can we say about these charges? • View Available Hints) • One has no charge. • They have different types of charge. • One has more charge than the other. • They have the same type of charge.

They have the same type of charge

When we say charge is conserved, we mainly mean that charge can be • View Available Hint(s) • transferred without loss like money in a bank constant in all bodies saved, like money in a bank created and destroyed in equal amounts

Transferred without loss like money in the bank

What Newton discovered most about gravity is that it is • the strongest of known forces ever present universal another rule of nature, though an important one

Universal

Atoms in a crystalline state or in an amorphous state are. flowing • in random positions in fixed positions vibrating about their own positions

Vibrating about their own positions

Atmospheric pressure is mainly due to the • View Available Hint(s) weight of air average temperature of air air pressure against Earth's surface motion of air molecules

Weight of air

Most atoms normally have a net charge that is • View Available Hint(s) • zero • negative O positive • positive in the nucleus and slightly more negative in its electrons

Zero

Consider someone in a rotating space habitat. Rotational motion provides a fictitious force an inertial force a support force gravity

a support force

ectromagnetic waves are composed of • View Available Hint(S) • light waves perpendicular longitudinal waves • electric and magnetic fields vibrating light vectors vibrating light vectors

electric and magnetic fields

The force that acts on a current-carrying wire placed in a magnetic field is • View Available Hint(s) parallel in direction to the magnetic field perpendicular or parallel depending on the orientation of the field • perpendicular in direction to the magnetic field 0 opposite in direction to the magnetic field

perpendicular in direction to the magnetic field

The statement "boiling is a cooling process" means when a liquid is boiling, it cools as fast as it warms O when a liquid is boiling, its temperature at the bottom is dropping when a liquid is boiling, its temperature is dropping • when a liquid is boiling, its temperature below surface is dropping

when a liquid is boiling, it cools as fast as it warms

Electromagnetic induction occurs in a loop of wire • View Available Hint(s) when there is relative motion of the loop and wire or when current changes in the loop when near a magneto • only when the loop moves near a magnet • only when a magnet moves near the loop • only when current changes in a loop near a magnet

when there is relative motion of the loop and wire or when current changes in the loop when near a magnet

How is radiant energy absorbed and emitted (as stated in Planck hypothesis)? • View Available Hint(s) • In random quantities • In discrete bundles or quanta • In a continuous flow With different values

• In discrete bundles or quanta

The buoyant force on a floating object is • less than the object's weight equal to the obiect's volume equal to the object's weight O more than the buoyant force than if submerged

Equal to the objects weight

Maxwell's counterpart to Faraday's law emphasizes electric and magnetic • View Available Hint(s) • forces O light • fields • energy

Fields

A scuba diver is planning to dive to the same depth in the open ocean and in a deep lake. Considering that salt water is denser that fresh water, where would the diver feel more pressure? In the ocean • We need to know the depth of the diver to answer this question. In the lake • Same in both

In the ocean

Rotational inertia of an object rotating about an axis becomes greater with A. increased mass B. decreased mass C. decreased mass and decreased distance to mass concentration D. increased mass and increased distance to mass concentration

Increased mass and increased distnace to mass concentration "D"

The horizontal and vertical components of velocity for a projectile are independent of each other dependent on each other • parts of a parabola • equal for angles greater than 45°

Independent of each other

The force that acts on an electron traveling in a magnetic field is • View Available Hint(s) opposite in direction to the magnetic field perpendicular or parallel depending on the orientation of the field O parallel in direction to the magnetic field • perpendicular in direction to the magnetic field

• perpendicular in direction to the magnetic field