In a system with two moving objects, when a collision occurs between the objects:

Select one:

a.the total kinetic energy is always conserved.

b.the total momentum is always conserved.

c.neither the kinetic energy nor the momentum is conserved.

d.the total kinetic energy and total momentum are always conserved.

Question2

What sound level change corresponds to a factor ofthreechange in intensity?

Select one:

a.11dB

b.3dB

c.5dB

d.30dB

e.0.3dB

Question3

Which one of the choices below represents the preferred practice regarding significant figures when multiplying the following:?

Select one:

a.196

b.200

c.195.72

d.195.7

e.195.720

Question4

What temperature increase is necessary to increase the power radiated from an object by a factor of 6?

Select one:

a.100%

b.4 K

c.about 57%

d.about 157%

e.6 K

Question5

A tennis ball is held above and in contact with a basketball, and then both are simultaneously dropped. The tennis ball bounces off the basketball at a fairly high speed. This is because:

Select one:

a.the tennis ball is slightly shielded from the Earth's gravitational pull.

b.the massive basketball transfers momentum to the lighter tennis ball.

c.the basketball falls farther than the tennis ball.

d.the tennis ball has a smaller radius.

Question6

On aPVdiagram, 2 curves are plotted, both starting at the same point (P1,V1) and both ending at the same increased volume (V2). One curve is for an isothermal process; the other is for an adiabatic process. Except for the common starting point, which curve is the upper one?

Select one:

a.The adiabatic process curve will always be the upper one.

b.The isothermal process curve will always be the upper one.

c.The isothermal one will start out higher, but the adiabatic one will eventually cross it.

d.Since they start at the same point and end at the same volume, they will coincide.

Question7

The unit of work, joule, is dimensionally the same as:

Select one:

a.newton-second.

b.newton-meter.

c.newton/second.

d.newton/kilogram.

Question8

Identify the following quantities as scalar or vector: distance from Batangas to Cavite, the time it takes ti have a nap, the mass of a sack of rice.

Select one:

a. scalar, vector, scalar

b. vector, vector, scalar

c. scalar, scalar, scalar

d. vector, scalar, vector

Question9

14.4 Phases of Matter and Phase Changes

A swimming pool heater has to be able to raise the temperature of the 30,000 gallons of water in the pool by 10.0C. How many kilowatt-hours of energy are required? (One gallon of water has a mass of approximately 3.79 kg and the specific heat of water is 4186 J/kg C.)

Select one:

a.216 kWh

b.1960 kWh

c.1320 kWh

d.1130 kWh

Question10

In a 2-dimensional Cartesian coordinate system they-componentof a given vector is equal to that vector's magnitude multiplied by which trigonometric function, with respect to the angle between vector andy-axis?

Select one:

a.tangent

b.sine

c.cosine

d.cotangent