boiling point
melting point
triple point
dew point
critical temperature
Correct answer is D
No explanation has been provided for this answer.
the polished vessel will cool faster because a polished surface is a good radiator
the polished vessel will cool faster because it will absorbe less heat from the room
the black vessel will cool faster because it is a better conductor of heat
the polished vesselwill cool faster because it reflects heat better
the black vessel will cool faster because a black surface radiates heat faster than a polished one
Correct answer is E
Black objects heat up faster than shiny ones, but they cool down faster too.
105J
2.5 x 103J
2 x 103J
5 x 103J
5 x 105J`
Correct answer is A
K.E = \(\frac{1}{2}\)mv2; m (at + u)2
since, v = at + u = \(\frac{1}{2}\) x 500 [(5 x 4)+ 0]2
= 105J
Which of the following statements defines correctly the efficiency of a machine?
the load carried by the machine divided by effort required in carrying the load
the distance moved by the load divided by the distance moved by the effort
the useful work done by the machine divided by the total work put into the machine
the movement of the load divided by the movement of the effort about the same point
the temperature at the end of the application of the machine divided by the initial temperature
Correct answer is C
No explanation has been provided for this answer.
360cm3
600cm3
240cm3
800cm3
450cm3
Correct answer is B
Since no loss of oil,
Density x volume = constant
D1V1 = D2 x V2
0.9 x 400 = V2
V2 = 600cm3