A hose of cross-sectional area 0.5m² is used to discharge water from a water tanker at a velocity of 60ms−³ in 20s into a container. If the container is filled completely, the volume of the container is
A. 240m3 B. 600m3 C. 2400m3 D. 6000m3 Correct Answer: Option B – 600m3 Explanation Vol = cross-sectional area x length ∴ vol. of water disharged per sec = 60ms-1 x 0.5m = 30m3 5-1 => Vol. of water discharged in the said 20s = 30m3 x 20 = 600m3 ∴ vol. of the...
A test tube of radius 1.0cm is loaded to 8.8g. If is placed upright in water; find the depth to which it would sink
A. 2.8cm B. 5.2cm C. 25.5cm D. 28.0cm Correct Answer: Option A = 2.8cm Explanation Pressure = F/A = pgh, where p = density, h = depth and g = 10ms-2 But F = P x A ∴ Force exerted by the load test tube = cross-sectional Area x Pressure i.e F = A x pgh ∴ h = F_ A x pg...
On top of a spiral spring of the force constant 500Nm−¹ is placed a mass of 5 x 10−³ kg. If the spring is compressed downwards by a length of 0.02m and then released; calculate the height to which the mass is projected?
A. 8 m B. 4 m C. 2 m D. 1 m Correct Answer: Option C = 2 m Explanation K = 500Nm-1; M = 5 x 10-3kg; e = 0.02m; g = 10ms-2. The elastic potential energy stored in the compressed spring is given by = 1/2Ke2, and the energy is transformed into gravitational potential...
A satellite is in a parking orbit if its period is?
A. less than the period of the earth B. more than the period of the earth C. equal to the period of the earth D. the square of the period of the earth Correct Answer: Option C – equal to the period of the earth Explanation A satellite is said to be in a parking...Products
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