physics

Counting of currency notes with moist fingers is based on the principles of?

A. diffusion B. cohesion C. adhesion D. viscosity Correct Answer: Option C - adhesion Explanation since currency and finger contain…

4 years ago

If a body mass 5kg is thrown vertically upwards with velocity U; at what height will the potential energy equal to the kinetic energy?

A. h =(u)²/g B. h = (u)²/4g C. h = (2u)²/g D. h = (u)²/2g Correct Answer: Option B -…

4 years ago

A near sighted student has a near point of 0.1m and a focal length of 5.0cm. What is the student’s far point?

A. 0.200m B. 8.000m C. 0.125m D. 2.100m E. No Correct Option Correct Answer: Option E = No Correct Option…

4 years ago

If a light wave has a wavelength of 500nm in air what is the frequency of the wave? [c = 3 x 10^8 ms-1]

A. 3.0 x 1014 Hz B. 6.0 x 1014 Hz C. 6.0 x 1012 Hz D. 2.5 x 1014 Hz Correct Answer: Option B…

4 years ago

The pressure of two moles of an ideal gas at a temperature of 27°C and volume 10‾²m³ is? [R = 8.313 J mol‾¹K‾¹]

A. 4.99 x 105  Nm‾² B. 9.80 x 10³ Nm‾² C. 4.98 x 10³ Nm‾² D. 9.80 x 105  Nm‾²…

4 years ago

What is the frquency of vibration if the balance wheel of a wrist watch makes 90 revolutions in 25s?

A. 0.01 Hz B. 0.04 Hz C. 2.27 Hz D. 3.60 Hz Correct Answer: Option D - 3.60 Hz Explanation…

4 years ago

which of the below conditions must hold for a body acted upon by a system of three coplanar forces equilibrium?

I. All the three forces must be concurrent. II. The upward force is equal to the downward force. III. The…

4 years ago

If a wheel 1.2 m in diameter rotates at one revolution per second; calculate the velocity of the wheel.

A. 3.6 ms‾¹ B. 3.77 ms‾¹ C. 4.0 ms‾¹ D. 7.5 ms‾¹ Correct Answer: Option B = 3.77 ms‾¹ Explanation…

4 years ago

Which of the following is NOT a vector quantity _____?

A. altitude B. acceleration C. displacement D. weight Correct Answer: Option A = altitude Explanation Altitude is just a measure…

4 years ago

Which of the below are the correct S. I units of the quantities indicated?

I. Force (N) II.Torque (Nm) III. Current (A) IV. Power (W) A. I and II only B. I and III…

4 years ago