Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

3,632.

In which of the following is the expansion of solids a disadvantage?

A.

the fitting of wheels in rims

B.

fire alarms

C.

the thermostat

D.

the bimatellic thermometer

E.

the balance wheel of a watch

Correct answer is E

No explanation has been provided for this answer.

3,633.

Which of the following is a reason why a concrete floor feels colder to the bare feet than a mat on the same floor during the rainy season?

A.

A mat if s better conductor of heat than the feet

B.

Mat losses heat to the bare feet at a faster rate than concrete floor

C.

Mat losses heat to the bare feet while the concrete floor extracts heat from them

D.

Concrete floor is a better conductor of heat than the mat

E.

Mat is a better conductor of heat than the floor

Correct answer is D

No explanation has been provided for this answer.

3,634.

A given mass of gas has a pressure of 80Nm-2 at a temperature of 47oC. If the temperature is reduced to 27oC with the volume remaining constant, the new pressure is

A.

46.0 Nm-2

B.

75.0 Nm-2

C.

80.0 Nm-2

D.

85.3 Nm-2

E.

139.4 Nm-2

Correct answer is B

P1/T1 = P2/T2

80/(273+47) = P1/(273+27) = 75Nm-2

3,635.

The clinical thermometer is characterized by having a

A.

wide range of temperature

B.

wide bore

C.

long stem

D.

constriction

E.

narrow bore

Correct answer is D

No explanation has been provided for this answer.