physis

The temperature of a 50-g sample of aluminum is raised from 20°C to 90°C when 770 cal of heat is added. The specific heat capacity of the aluminum is______

0.22

Rank the following pith balls (all of the same size and mass) from the one with the largest surplus of electrons (top) to the one with largest deficit of electrons (bottom). Position 1 of 5 Very negatively charged pith ball correct toggle button unavailable Very negatively charged pith ball

1. very negatively charged pith ball 2. slightly negatively charged pith ball 3. neutral pith ball 4. slightly positively charged pith ball 5. very positively charged pith ball

At any given point, the electric field is 1000 N/C. Rank the following charges by the electric force on them, with the largest positive electrostatic force at the top and the largest negative electrostatic force at the bottom.

10 5 4 8

10 degrees difference on the Celsius scale equals to______degrees difference on the Kelvin scale.

10 degree

How much heat do you need to take from a 1-g sample of boiling water to lower its temperature to 0°C. The specific heat capacity of water is 1 cal/g⋅°C(1 cal = 4.18 J).

100cal 418 j

A positive charge feels a force of 10 N to the right due to another negative charge. The negative charge must feel a force of 10 N to the left according to Newton's

3

Which numbers represent the

32f 0c 273 k

A box of crackers is labeled "140 Calories per serving." The energy inside a serving of crackers is about _____.

5.8 x 105 J 140 kcal

How much energy is needed to raise the temperature of a 100 g of water from 10°C to 60°C? The specific heat capacity of water is 1.0 cal/g⋅°C. Multiple choice question.

5000 cal Reason: Q = mcΔT = 100 g × 1 cal/g⋅°C × 50°C = 5000 cal.

A charge of --1 C is approximately how many electrons?

A million-trillion

You have three pith balls labeled A, B, and C. Each has been given an electrostatic charge, but you do not know what kind each has. When you bring A and B close together, you find they repel and when you bring B and C together you find they also repel. Which statement is true?

A, B, and C all have the same type of charge.

The primary mode of energy transfer from a hot burner to a pot sitting on it is by

Conduction

What is the physical principle that best explains the macaroni rising and falling in a pot of boiling water?

Convection current

The charge on objects is measured in units called——————Just one of these units is an immense amount of charge.

Coulomb

Match the symbol (in the left column) with its definition (in the right column).

E->The force per unit positive charge ΔV-> Choice, The change in the electrostatic potential energy per unit positive charge The change in the electrostatic potential energy per unit positive charge

Consider three electric fields A, B, and C. The electric field lines are the closest to each other in field A, while they are the farthest from each other in field C. Which of the following statements is true of these electric fields? Multiple choice question.

Electric field A is the strongest.

Which of the following statements are true about an electric field? (Check all that apply.)

Electric field can exist in a vacuum. We can talk about an electric field even if there is no charge at that point.

Match the electric phenomenon (in the left column) with the presence or absence of a charge (in the right column).

Electrostatic force->Requires a charge to be present Electric field-> A charge is not present.

What is heat?

Heat is the energy that flows between objects of different temperatures.

A thermodynamics process in which the pressure remains constant is called

Isobaric

In the equation of state (PV = NkT), T is the temperature and should be expressed in

Kelvin.

If the net change in energy for an ideal gas is negative, which of the following will decrease?

Kinetic energy Internal energy

Which of the following terms apply to an atom that has the negative part of its charge separated from the positive part? (Check all that apply.)

Polarized Dipole

Match the charge (in the left column) with the direction of the electric field lines from the charge (in the right column). Positive charge Positive charge Drop zone All electric field lines point toward the charge. incorrect Toggle Button Unavailable.

Positive charge->All electric field lines point away from the charge. Negative charge-> All-electric field lines point toward the charge.

The work done by a gas is proportional to which of the following?

Pressure Change in volume

The equation of state for the same amount of an ideal gas at two different temperatures T1 and T2 could be written as ______.

T1/T2 = P1V1/P2V2 P1V1/T1 = P2V2/T2

Which of the following can be determined when the charge on a particle and the electric field are known? (Check all that apply.)

The magnitude of the electric force The direction of the electric force

In which of the following situations would the atom be a dipole? (Check all that apply.)

The negative part of the atom is displaced to the right of the positive center of the atom. The negative part of the atom is displaced to the left of the positive center of the atom.

When can we treat charged objects as point charges?

The objects are small compared to the distance separating them

You have set up two pith balls so that they have different types of charge, and you have put an unknown charge on a rod. If you test the type of charge on the rod, what conclusions will you find? (Check all that apply.)

The rod carries one of the two types of charge already on the pith balls. The rod will attract one pith ball and repel the other.

Which of the following statements are true for the work done by an electric field? (Check all that apply.) Multiple select question.

The work done by an electric field is equal to the increase in potential energy of the charge. The work done by an electric field depends on the magnitude of charge.

Which of the following are true of both Newton's law of universal gravitation and Coulomb's law for charges? (Check all that apply.)

They depend inversely on the square of the distance between the objects. They describe the interaction of two objects. They depend on a constant.

Match the term (in the left column) with its unit (in the right column).

Voltage-> Joules per coulomb Electric field -> Newtons per coulomb Charge -> Coulombs Electrostatic force -> Newtons

The lowest possible temperature an object can approach is _____.

absolute zero. zero Kelvin. --273 degrees Celsius.

Two objects with opposite charges will______each other

attract

The electrostatic force is conservative. This means we _____. (Check all that apply.)

can convert the electrostatic potential energy to kinetic energy without loss of energy can recover any work done by the electrostatic force can use the principle of the conservation of energy

The electrostatic force is conservative. This means we _____. (Check all that apply.)

can recover any work done by the electrostatic force can use the principle of the conservation of energy can convert the electrostatic potential energy to kinetic energy without loss of energy

The electrostatic force between a charged rod and a charged ball depends on the _____

charge on the ball distance between the ball and the rod charge on the rod

Temperature measurement is a(n) __________measurement.

comparative

The primary mode of energy transfer from your bare feet to a cold ceramic bathroom floor is by

conducation

Conduction is the process by which heat flows from one object to another through

contact

The transfer of heat from a furnace to the house through ducts is by the process of

convection

Heat is the energy transferred between two objects of different temperatures. Temperature is a measure that tells the of the energy transfer.

direction

In a uniform electric field, the change in voltage is proportional to the _____. (Check all that apply.) Multiple select question.

distance electric field

According to Coulomb's law, the electrostatic force will be a quarter of what it was if we ________ the distance , Incorrect Unavailable the distance between the

double

A negatively charged object has a surplus of

electrons

Electric charges on objects cause the objects to exert_______forces on each other.

electrostatic

The term "heat" in physics is

energy transferred to a body because of a difference in temperature. different from temperature.

It is impossible to add heat to an ideal gas without raising its temperature.

false

If heat transfers from object A to object B, this means that object A is

hotter

The internal energy of a gas remains constant in an

isothermal process.

When heat is added to a system and no work is done on or by the system,

its internal energy increases.

When an ideal gas is compressed adiabatically,

its temperature increases. its internal energy increases. work must be done on it.

If heat is added to an ideal gas as it is getting compressed,

its volume must decrease. negative work will be done by the gas.

The units for voltage are joules per coulomb joules Incorrect Unavailable per unit charge.

joules

For an ideal gas, all of the internal energy of the gas is

kinetic

Electric field , Incorrect Unavailable represent the influence some charge has on its surroundings when it is brought into that area.

lines

In an adiabatic process,

no exchange of heat takes place during the process.

Lying out in the sun to get a tan uses a mode of heat transfer called

radiation

Rank the following steps in the order needed to charge a metal ball by induction from the first step (top) to the last (bottom).

rub a plastic rod with cat fur to charge the rod place the rod near the metal ball without touching the ball Touch your finger to the metal ball on the opposite end from the plastic rod. Remove your finger from the ball.

A material that is not a good conductor but also not a good insulator is called a(n)

semiconductor

When you apply the first law of thermodynamics to an ideal gas undergoing an isothermal process, you must Multiple select question.

set ΔU = 0. set W = Q.

Heat will flow ______ in a material with low thermal conductivity.

slower

In Joule's experiment, a falling mass causes peddles to rotate in a water container, thereby raising the water's__________.

temperature

In an isothermal process, the

temperature remains constant.

If you have a 1 g ice cube and a 1 g copper cube, both at 0 °C, you can conclude that

the average kinetic energy of the molecules are the same.

The change in the voltage (or electric potential) is equal to _____.

the change in the electrostatic potential energy per unit positive charge

The first law of thermodynamics is a restatement of

the principle of conservation of energy.

The thermal conductivity of a material is directly proportional to which of the following properties? Multiple select question.

the type of the material. the difference in temperature.

If an area of space is said to have an electric field, _____. (Check all that apply.) Multiple select question.

there must be some charge(s) nearby a charge placed in that region will feel an electrostatic force

The presence of a charge in an area changes the region because any other charge in the region _____

will feel a force

The pressure of a gas times its change in volume is the____done by the gas.

work