A block of material of volume 20cm−³ and density 2.5gcm−³ is suspended from a spring balance with half the volume immersed in water. What is the reading of the spring balance? (Density of water = 1.0gcm−³).
A. 8g B. 25g C. 30g D. 40g E. 50g Correct Answer: Option D – 40g Explanation W = pvg = (2.5 x 10 x 60)/100 = 0.500N. Upthrust = wt of liquid displaced = pvg water. pvg water = (1x20x10)/2 = 0.10N Reading => 0.500N – 0.100N = 0.4N =...Which of the following is used to determine the relative density of the acid in a car battery?
A. Hypsometer B. Hygrometer C. Manometer D. Hydrometer E. Spectrometer Correct Answer: Option D – HydrometerWhat is the effective force used in pulling the nail?
A boy pulls a nail from the wall with a string tied to the nail. The string is inclined at an angle of 60° to the wall. If the tension in the string is 4N, what is the effective force used in pulling the nail? A. 2√3 N B. 4 N C. 4√3 N D. 8 N E. 2 N Correct Answer:...Which of the following is not a consequence of a force field?
A. weight B. surface tension C. gravitational pull D. magnetic force E. electric force Correct Answer: Option B – surface tensionWhich of the following is NOT a vector quantity?
A. momentum B. force C. velocity D. temperature E. displacement Correct Answer: Option D – temperatureProducts
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