The hatch door of a submarine has an area of 0.5m2. The specific gravity of sea water is 1.03. Assume that g = 10ms-1,and neglect the atmospheric pressure. The force exerted by the sea water on the hatch door at a depth of 200m is
One of the following readings represents the measurement of the length of a metal rod using vernier callipers, Taking the reading accuracy into consideration, the most likely one is
When equal weights of iron and water are subjected to equal supply of heat, it is found that the piece of iron become more hotter than water after a short time because
A.
the specific heat of iron is higher than that of water
B.
iron is in solid form
C.
water is in liquid form
D.
the specific heat of water is higher than that of iron
The tyre pressure of a car was found to be 150cmHg in the morning at a temperature of 27°C. Hard driving in the afternoon raised the temperature of the tyres to 57°C. The tyre pressure had by the afternoon was?
