physics

Which of the following is used to measure relative humidity?

A. hydrometer B. barometer C. hypsometer D. hygrometer Correct Answer: Option D D. hygrometer

6 years ago

When table salt is added to ice, the melting point of the ice?

A. is raised B. is lowered C. remains unchanged D. is first raised, then lowered Correct Answer: Option B B.…

6 years ago

It takes 4 minutes to boil a quantity of water using an electrical heating coil. How long will it take to boil the same quantity of water using the same coil if the current is doubled? [Neglect any external heat losses]

A. 8 minutes B. 4 minutes C. 2 minutes D. 1 minute Correct Answer: Option C C. 2 minutes

6 years ago

As a bicycle Tyre was being pumped up, it was noticed that contrary to Boyle’s law the volume increased as the pressure increased. The best explanation of this is that Boyle’s law is only true for

A. ideal gases B. a fixed mass of gas C. a mixture of gases D. a gas at variable temperature…

6 years ago

A rod of initial length 2m at a temperature of 25°C is heated to 80°C. Calculate the increase in the length of the rod if its linear expansivity is 4.0 x 10‾³K‾¹

A. 0.26m B. 0.44m C. 0.53m D. 0.84m Correct Answer: Option B B. 0.44m Explanation l2−l1=αl1(θ2−θ1)=4.0×10‾³ × 2 (80−25) =…

6 years ago

The period of a simple pendulum of length 80.0cm was found to have doubled when the length of the pendulum was increased by X. Calculate X.

A. 26.7cm B. 40.0cm C. 160.0cm D. 240.0cm Correct Answer: Option D D. 240.0cm

6 years ago

Two forces 6N and 8N, act eastwards and northwards respectively on a body. Calculate the magnitude of their equilibrant.

A. 2N B. 7N C. 10N D. 14N Correct Answer: Option C C. 10N

6 years ago

The following properties of a solid are measured on earth. Which of the properties will have a different value if measured in space?

i. weight ii. specific heat capacity iii. density. A. i only B. ii only C. iii only D. ii and…

6 years ago

A moving body accelerates when it?

A. changes its direction at a constant speed B. maintains a constant linear speed C. covers equal distances in equal…

6 years ago

A body moving in a circle at constant speed has _________. Which of the statements above are correct?

i. a velocity tangent to the circle ii. a constant kinetic energy ii. an acceleration directed towards the circumference of…

6 years ago
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