What is the gravitational potential due to a molecule of mass (m) and at a distance (r) from it? (G = gravitational constant).
A. Gm²/r² B. Gm/r C. Gm²/r D. G²m2/r E. m²/Gr² Correct Answer: Option B – Gm/rWhich of the following is not a property of longitudinal waves?
A. compression B. reflection C. refraction D. polarization E. diffraction Correct Answer: Option D – polarization
A string is stretched between two points 50cm apart. It is then plucked at its center and the velocity of the wave produced is 300m/s. Calculate the number of vibrations made by the string in 1s.
A. 3 B. 6 C. 150 D. 300 E. 600 Correct Answer: Option D = 300 Explanation λ = 2 x 50 = 100cm = 1m. V = fλ, f = v/λ = 300.
In a wave the maximum displacement of particles from their equilibrium positions is called?
A. frequency B. amplitude C. period D. wavelength E. wave velocity Correct Answer: Option B – amplitudeProducts
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