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## The engine of a car provides a forward force of 1240 N and the total resistive force on the car is 800N. If the mass of the car is 1220 kg, determine the distance the car has to travel from the rest before acquiring a speed of 4 m s−1.

A. 44.0 m B. 22.2 m C. 11.1 m D. 5.5 m Correct Answer: Option B – 22.2 m

## Which of the folowing statements about light travelling from one material medium to another is not correct?

A. The refracted angle is less than the incident angle if the speed is higher in the first material A. Its wavelength does not change B. It bends away from the normal if the speed is lower in the first material D. Its frequency changes. Correct Answer: Option D...

## Which of the following concepts is a method of heat transfer that does not require a material medium?

A. Conduction B. Diffusion C. Convection D. Radiation Correct Answer: Option D – Radiation Explanation Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials. Light, radio, and microwaves are good...

## The diameter of a brass ring at 30 °C is 50.0 cm. To what temperature must this ring be heated to increase its diameter to 50.29 cm? [ linear expansivity of brass = 1.9 x 10−5 K−1]

A. 152.6 °C B. 182.6 °C C. 306.1 °C D. 335.5 °C Correct Answer: Option A = 152.6 °C

## Which of the following statements-about electromagnetic waves is not correct?

A. They carry energy as they travel through space B. They travel with the speed of light C. They are longitudinal D. The electric and magnetic fields are at right angles to each other Correct Answer: Option C – They are longitudinal Explanation All...

## The distance between the fixed points of a mercury-in-glass thermometer is 30 cm. Determine the temperature when the mercury level is 10.5 cm above the lower fixed point

A. 28.6ºC B. 30.0 ºC C. 35.0 ºC D. 40.5 ºC Correct Answer: Option C = 35.0 ºC