radiation
convection
conduction
evaporation
Correct answer is C
No explanation has been provided for this answer.
1 : 3
15 : 8
7 : 3
3 : 1
Correct answer is C
Heat lost = heat gained
mh x c x (75 - 40) = mc x c x (40 - 25)
\(\frac{m_h}{m_c}\) = \(\frac{35}{15}\)
= \(\frac{7}{3}\)
The amount of heat needed to raise the temperature of 10kg of copper by 1k is its
specific heat capacity
heat capacity
latent heat
internal energy
Correct answer is B
No explanation has been provided for this answer.
The product PV where P is pressure and V is volume has the same unit as
force
power
energy
accelaration
Correct answer is C
PV = \(\frac{N}{m^2}\) x \(\frac{m^3}{1}\)
= Nm
= Force x distance = work done = energy
4.0 x 102kgm-3
4.0 x 103kgm-3
1.0 x 103kgm-3
1.0 x 106kgm-3
Correct answer is B
since the object floats, density of liquid = density of object
converting 500cm3 to m3,
\(\frac{500}{10^{6}} = 5 \times 10^{-4}m^{3}\)
D = \(\frac{m}{v}\)
= \(\frac{2}{5 \times 10^{-4}}\)
=\(4.0 \times 10^{3}kgm^{-3}\)