Water is unsuitable for use as a thermometric liquid because of its?
A. expands unevenly between 0ºC and 40ºC B. has a narrow temperature range C. has a concave meniscus D. maintains fixed density Correct Answer: Option A A. expands unevenly between 0ºC and 40ºCThe crackling noise produced by aluminum roofing sheets on a house during a hot sunny day is a result of?
A. thermal equilibrium of the sheets B. conduction of heat by the sheets C. contraction of the sheets D. expansion of the sheets Correct Answer: Option D D. expansion of the sheetsA body of mass 1000kg is released from a height of 10m above the ground. Determine its kinetic energy just before it strikes the ground. [g = 10ms‾²]
A. 10J B. 10³J C. 10^4J D. 10^5J Correct Answer: Option D Explanation Ke = mgh Ke = Pe ½MV² = mgh Ke = 1000 x 10 x 10 Ke = 100000J Ke = 105JA uniform bar AB is balanced on a knife-edge which is 60cm from B by a mass of 22g which hangs at C 10cm from A. Calculate the mass of the bar.
A. 133.2g B. 66.0g C. 60.0g D. 22.0g Correct Answer: Option B B. 66.0g Explanation clockwise movement = anticlockwise movement w x 10 = 22 x 30 w = 22×30/10 w = 66.0gA bullet fired vertically upwards reaches a height of 500m. Neglecting air resistance, calculate the magnitude of the initial velocity of the bullet. [g = 10ms‾²]
A. 500.0ms‾¹ B. 100.0ms‾¹ C. 70.0ms‾¹ D. 50.0ms‾¹ Correct Answer: Option B Explanation V² = U² + 2gs V² = 0 V² = 2gs h = 500m g = 10ms‾² V² = 2 x 10 x 500 V² = 10,000 V =...Products
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