The energy associated with a bowling ball knocking down bowling pins is

Work expanded over a defined period of time is defined as

A particle moves along the x axis from xi to xf. Of the following values of the initial and final coordinates, which results in the displacement with the largest magnitude?

The average speed of a moving object during a given interval of time is always:

Each of four particles move along an x axis. Their coordinates (in meters) as functions of time (in seconds) are given by

particle 1: x(t) = 3.5 − 2.7t3 ; particle 2: x(t) = 3.5 +2.7t3 ;

particle 3: x(t) = 3.5 +2.7t2 ; particle 4: x(t) = 3.5 − 3.4t − 2.7t2

Which of these particles have constant acceleration?

. A heavy ball falls freely, starting from rest. Between the third and fourth second of time it travels a distance of:

A vector of magnitude 20 is added to a vector of magnitude 25. The magnitude of this sum might be:

A 5.0-kg cart is moving horizontally at 6.0m/s. In order to change its speed to 10.0m/s, the net work done on the cart must be

A force of 10N holds an ideal spring with a 20-N/m spring constant in compression. The potential energy stored in the spring is:

Two bodies, A and B, have equal kinetic energies. The mass of A is nine times that of B. The ratio of the momentum of A to that of B is:

A 1.0-kg ball moving at 2.0m/s perpendicular to a wall rebounds from the wall at 1.5m/s. The change in the momentum of the ball is:

An inelastic collision is one in which:

Block A, with a mass of 2.0 kg, moves along the x axis with a velocity of 5.0m/s in the positive x direction. It suffers an elastic collision with block B, initially at rest, and the blocks leave the collision along the x axis. If B is much more massive than A, the speed of A after the collision is:

In simple harmonic motion, the restoring force must be proportional to the:

The Sun is about 1.5 × 10^11 m away. Speed of light is c = 3.108 m/s. The time for light to travel this distance is about

A stone is tied to a 0.50-m string and whirled at a constant speed of 4.0m/s in a vertical circle. Its acceleration at the top of the circle is:

A forward horizontal force of 12N is used to pull a 240-N crate at constant velocity across a horizontal floor. The coefficient of friction is:

An ideal spring is hung vertically from the ceiling. When a 2.0-kg mass hangs at rest from it the spring is extended 6.0 cm from its relaxed length. A downward external force is now applied to the mass to extend the spring an additional 10 cm. While the spring is being extended by the force, the work done by the spring is:

A 50-N force is the only force a 2-kg crate that starts from rest. At the instant the object has gone 2 m the rate at which the force is doing work is:

The transfer of heat by direct atomic collisions is reffered to as

The amount of heat energy required to raise the temperature of one gram of water by one degree Celsius is a

Which of the following materials has the highest thermal conductivity?

The sun transfers most of its heat energy to the earth by mean of

The specific heat of a substance is:

The energy given off as heat by 300g of an alloy as it cools through 50C◦ raises the temperature of 300g of water from 30◦C to 40◦C. The specific heat of the alloy (in cal/g·C◦) is:

A Kelvin thermometer and a Fahrenheit thermometer both give the same reading for a certain sample. The corresponding Celsius temperature is:

Possible units for the coefficient of volume expansion are:

Heat has the same units as:

A Carnot heat engine operates between 400K and 500K. Its efficiency is:

A Kelvin thermometer and a Fahrenheit thermometer both give the same reading for a certain sample. The corresponding Celsius temperature is:

The coefficient of linear expansion of iron is 1.0×10−5per C◦. The surface area of an iron cube, with an edge length of 5.0cm, will increase by what amount if it is heated from 10◦C to 60◦C?

The coefficient of linear expansion of steel is 11×10−6per C◦. A steel ball has a volume of exactly 100cm3 at 0◦C. When heated to 100◦C, its volume becomes:

The heat capacity of an object is:

The heat capacity of object B is twice that of object A. Initially A is at 300K and B is at 450K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is:

Ten grams of ice at−20◦C is to be changed to steam at 130◦C. The specific heat of both ice and steam is 0.5cal/g·C◦. The heat of fusion is 80cal/g and the heat of vaporization is 540cal/g. The entire process requires:

According to the first law of thermodynamics, applied to a gas, the increase in the internal energy during any process:

A system undergoes an adiabatic process in which its internal energy increases by 20J. Which of the following statements is true?

A heat engine:

A Carnot heat engine operates between 400K and 500K. Its efficiency is:

The total negative charge on the electrons in 1mol of helium (atomic number 2, molar mass 4) is:

An electrical insulator is a material:

Two identical charges, 2.0m apart, exert forces of magnitude 4.0N on each other. The value of either charge is:

A conductor is distinguished from an insulator with the same number of atoms by the number of:

If the plate area of an isolated charged parallel-plate capacitor is doubled

A 2-µF and a 1-µF capacitor are connected in series and a potential difference is applied across the combination. The 2-µF capacitor has:

Two identical capacitors, each with capacitance C, are connected in parallel and the combination is connected in series to a third identical capacitor. The equivalent capacitance of this arrangement is:

A car battery is rated at 80A·h. An ampere-hour is a unit of

Current is a measure of:

By using only two resistors, R1 and R2, a student is able to obtain resistances of 3Ω, 4Ω, 12Ω, and 16Ω. The values of R1 and R2 (in ohms) are:

A 60-watt light bulb carries a current of 0.5A. The total charge passing through it in one hour is:

Conduction electrons move to the right in a certain wire. This indicates that:

A student kept her 60-watt, 120-volt study lamp turned on from 2:00 PM until 2:00 AM. How many coulombs of charge went through it?

47. A certain x-ray tube requires a current of 7mA at a voltage of 80kV. The rate of energy dissipation (in watts) is:

A 3-Ω and a 1.5-Ω resistor are wired in parallel and the combination is wired in series to a 4-Ω resistor and a 10-V emf device. The current in the 3-Ωresistor is:

Two parallel long wires carry the same current and repel each other with a forceFper unit length. If both these currents are doubled and the wire separation tripled, the force per unit length becomes

Faraday’s law states that an induced emf is proportional to:

A car travels northward at 75km/h along a straight road in a region where Earth’s magnetic field has a vertical component of 0.50×10−4T. The emf induced between the left and right side, separated by 1.7m, is:

A square loop of wire lies in the plane of the page. A decreasing magneticfield is directed into the page. The induced current in the loop is:

At any point the magneticfield lines are in the direction of:

Speed of light is c = 3.108 m/s. Radiowaves of wavelength 300m have a frequency of:

Consider: radiowaves(r), visible light (v), infrared light (i), x-rays (x), and ultraviolet light (u). In order of increasing frequency, they are:

. Speed of light is c = 3.108 m/s. If the amplitude of the electric field in a plane electromagnetic wave is 100V/m then the amplitude of the magnetic field is

For an electromagnetic wave the direction of the vector E×B gives:

The light intensity 10m from an isotropic point source is 1000W/m2 . The intensity 100m from the same source is: