In which of the following media would sound wave travel fastest?
A. wood B. water C. iron D. mercury Correct Answer: Option C C. ironA travelling microscope is focused on a mark on a table. If a glass block of thickness 18.0cm is placed on the mark by how many centimeters will the microscope be moved upwards so as to focus the mark once again? [refractive index of glass = 1.5]
A. 27cm B. 24cm C. 9cm D. 6cm Correct Answer: Option D D. 6cm Explanation Apparent depth = thickness/refractive index = 18/1.5 = 12cm Upward adjustment = 18 – 12 = 6cmWhich of the following distances is usually adjustable in the camera? The distance between the
A. lens and the film B. diaphragm and the shutter C. shutter and the film D. diaphragm and the film Correct Answer: Option B B. diaphragm and the shutterA ray from a fixed object is incident on a plane mirror at an angle of 20°. If the mirror is rotated through 30° by how many degree would the reflected ray rotate?
A. 60° B. 50° C. 40° D. 30° Correct Answer: Option A A. 60°The distance between the successive crests of a wave travelling at 20ms-1 is 25cm. Calculate the frequency of the wave.
A. 0.8Hz B. 5.0Hz C. 50.0Hz D. 80.0Hz Correct Answer: Option D D. 80.0Hz Explanation f = v/π = 20/0.25 = 80HzProducts
-
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
Original price was: ₦1,000.00.₦300.00Current price is: ₦300.00.
-
Co-Ownership Structures and Land Acquisition Methods in Nigeria
Original price was: ₦1,000.00.₦300.00Current price is: ₦300.00.
-
Rights in Community Land and Fundamental Land Concepts in Nigeria
Original price was: ₦1,000.00.₦300.00Current price is: ₦300.00.
-
Customary Land Control and the Origins of Nigeria's Land Use Act
Original price was: ₦1,000.00.₦300.00Current price is: ₦300.00.
-
Land Ownership Principles and Transaction Laws in Nigeria
Original price was: ₦1,000.00.₦300.00Current price is: ₦300.00.