physics

A body of mass 5kg moving with a velocity of 10ms-1 collides with a stationary body of mass 6kg. If the two bodies stick together and move in the same direction after their collision, calculate their common velocity

A. 4.55ms-1 B. 12.00ms-1 C. 30.00ms-1 D. 50.00ms-1 Correct Answer: Option A A. 4.55ms-1

6 years ago

Which of the following about an object performing simple harmonic motion is correct? Its acceleration

A. is maximum at the extreme ends B. is constant and directed towards a fixed point C. is zero when…

6 years ago

Water falls through a height of 50m. Determine the temperature rise at the bottom of the fall. [Neglect energy losses. Specific heat capacity of water = 4200Jkg-1 K-1, g = 10m/s²]

A. 0.119°C B. 0.840°C C. 1.190°C D. 8.400°C Correct Answer: Option A A. 0.119°C Explanation mgh = mcθ θ=gh/c=(10×50)/4200 =…

6 years ago

An immersion heater rated 400W, 220V is used to heat a liquid of mass 0.5kg. If the temperature of the liquid increases uniformly at the rate of 2.5ºC per second, calculate the specific heat capacity of the liquid. [Assume no heat is lost]

A. 1100Jkg-1K-1 B. 320Jkg-1K-1 C. 200Jkg-1K-1 D. 176Jkg-1K-1 Correct Answer: Option B Explanation pt = mcθ C = pt/mθ =…

6 years ago

A body of mass M, has a specific heat capacity S, and a heat capacity C. If the temperature of the body changes by θ°C, Which of the following equation is correct?

A. MSθ = Mv‾¹ B. MS = C C. MS = sθ D. MS = Cθ Correct Answer: Option B…

6 years ago

The lower and upper fixed point of a thermometer are 30mm and 180mm respectively. Calculate the temperature in degrees Celsius when the thermometer reads 45mm.

A. 10.0°C B. 15.0°C C. 20.0°C D. 30.0°C Correct Answer: Option A A. 10.0°C

6 years ago

A body of mass 25kg, moving at 3ms-1 on a rough horizontal floor is at rest after sliding through a distance of 2.50m on the floor. Calculate the co-efficient of sliding friction. [g = 10.0ms-2]

A. 0.09 B. 0.18 C. 0.36 D. 0.54 Correct Answer: Option B B. 0.18

6 years ago

The friction which exists between two layers of liquid in relative motion is called?

A. capillarity B. surface tension C. viscosity D. cohesion Correct Answer: Option C C. viscosity

6 years ago

Which of the following statements about a spring balance and/or a chemical balance is not correct?

A. the chemical balance operates on the principle of moments B. the spring balance operates on Hooke's law C. either…

6 years ago

Each of the following physical quantities is classified as a vector or a scalar quantity. Which of the classifications is correct?

A. electric potential (Vector) B. momentum (scalar) C. gravitational field intensity (scalar) D. magnetic flux density (vector) Correct Answer: Option…

6 years ago
Show more Posts
Show previous Posts