physics

An object is placed 10cm in front of a plane mirror. If it is moved 8cm away father away from the mirror, determine the distance of the final image from the mirror

A. 2cm B. 9cm C. 16cm D. 18cm Correct Answer: Option D D. 18cm

6 years ago

Which of the following phenomena is not a direct consequence of rectilinear propagation of light?

A. lunar and solar eclipses B. images of objects in a pin hole camera C. diffraction of light D. shadows…

6 years ago

The distance between two points P and Q, along a wave is 0.05m. If the wavelength of the wave is 0.10m, determine the phase angle between P and Q in radians

A. 0.1π B. π C. 2π D. 10π Correct Answer: Option B B. π

6 years ago

Which of the following wave is electromagnetic?

A. x-rays B. sound waves C. water waves D. tidal waves Correct Answer: Option A A. x-rays

6 years ago

The pressure of a fixed mass of an ideal gas at 27°C is 3 pa. The gas is heated at a constant volume until its pressure is 5 pa. Determine the new temperature of the gas.

A. 100°C B. 227°C C. 273°C D. 500°C Correct Answer: Option B B. 227°C

6 years ago

According to the kinetic theory of gasses, which of the following property of a gas can be affected by the collision of the gas molecule with the walls of the container?

A. temperature B. energy C. viscosity D. pressure Correct Answer: Option D D. pressure

6 years ago

A body of mass 200g and specific heat capacity 0.4Jg-1k-1 cools from 37°C to 31°C. Calculate the quantity of the heat released by the body.

A. 4800J B. 1200J C. 480J D. 202J Correct Answer: Option C Explanation Q = mcθ = 200 x 0.4…

6 years ago

A relative density bottle of volume 50cm3 is completely filled with a liquid at 30oC. It is then heated to 80oC such that 0.75cm3 of the liquid is expelled. Calculate the apparent cubic expansivity of the liquid.

A. 0.00030k-1 B. 0.00032k-1 C. 0.01970k-1 D. 0.02030k-1 Correct Answer: Option A A. 0.00030k-1

6 years ago

Which of the following statements distinguishes thermal conduction for convection?

i. Conduction requires a material medium while convection does not ii. In convection, there is actual motion of hot material,…

6 years ago

The ice and steam point on a mercury-in-glass thermometer are 10cm and 30cm respectively. Calculate the temperature in decree Celsius when the mercury meniscus is the 14cm mark

A. 20°C B. 30°C C. 34°C D. 70°C Correct Answer: Option A A. 20°C

6 years ago
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