1
IIT-JEE 2010 Paper 1 Offline
Numerical
+3
-0
A binary star consists of two stars A (mass 2.2Ms) and B (mass 11Ms), where Ms is the mass of the sun. They are separated by distance d and are rotating about their centre of mass, which is stationary. The ratio of the total angular momentum of the binary star to the angular momentum of star B about the centre of mass is
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2
IIT-JEE 2010 Paper 1 Offline
Numerical
+3
-0
Gravitational acceleration on the surface of a planet is $${{\sqrt 6 } \over {11}}g$$, where $$g$$ is the gravitational acceleration on the surface of the earth. The average mass density of the planet is $${2 \over 3}$$ times that of the earth. If the escape speed on the surface of the earth is taken to be 11 kms-1, the escape speed on the surface of the planet in kms-1 will be
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3
IIT-JEE 2010 Paper 1 Offline
MCQ (Single Correct Answer)
+2
-0.5
A real gas behaves like an ideal gas if its
A
pressure and temperature are both high
B
pressure and temperature are both low
C
pressure is high and temperature is low
D
pressure is low and temperature is high
4
IIT-JEE 2010 Paper 1 Offline
Numerical
+3
-0
Two spherical bodies A (radius 6 cm ) and B (radius 18 cm ) are at temperature T1 and T2, respectively. The maximum intensity in the emission spectrum of A is at 500 nm and in that of B is at 1500 nm. Considering them to be black bodies, what will be the ratio of the rate of total energy radiated by A to that of B?
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