1
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
A remote-sensing satellite of earth revolves in a circular orbit at a height of 0.25 $$ \times $$ 106 m above the surface of earth. If earth's radius is 6.38 $$ \times $$ 106 m and g = 9.8 ms$$-$$2, then the orbital speed of the satellite is
A
9.13 km s$$-$$1
B
6.67 km s$$-$$1
C
7.76 km s$$-$$1
D
8.56 km s$$-$$1
2
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
A satellite S is moving in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth. Then,
A
the linear momentum of S remains constant in magnitude.
B
the acceleration of S is always directed towards the centre of the earth.
C
the angular momentum of S about the centre of the earth changes in direction, but its magnitude remains constant.
D
the total mechanical energy of S varies periodically with time.
3
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
The value of coefficient of volume expansion of glycerin is 5 $$ \times $$ 10$$-$$4 K$$-$$1. The fractional change in the density of glycerin for a rise of 40oC in its temperature, is
A
0.025
B
0.010
C
0.015
D
0.020
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. If the speed of the liquid in the tube is V, the speed of the ejection of the liquid through the holes is
A
$${{VR{}^2} \over {{n^3}{r^2}}}$$
B
$${{{V^2}R} \over {nr}}$$
C
$${{V{R^2}} \over {{n^2}{r^2}}}$$
D
$${{V{R^2}} \over {n{r^2}}}$$
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