How many days would be in a year if the distance between the earth and the sun were reduced to half of its present value (assuming circular orbit) ?

Related Mcqs:

1. An artificial satellite revolves round the Earth in circular orbit, which quantity remains constant?

   A. Angular Momentum B. Angular Displacement C. Linear Velocity D. None of the above Submitted by: Naveed Tahir...

2. When two bodies move toward each other with constant speeds the distance between them decreases at the rate of 6m / sec. If they move in the same direction the distance between them increases at the rate of 4m/sec. Then their speeds are________________?

   A. 5m/s, 1m/s B. 3m/s, 3m/s C. 6m/s, 1m/s D. 4m/s, 2m/s...

3. The radius of geostationary orbit from the centre of the earth is nearly______________?

   A. 42000km B. 36000km C. 24000 km D. 18000 km...

4. The electric P.E of an electron in an orbit at a distance rn from the positive charge_____________?

   A. Ke2/rn B. Ke2/rn2 C. ÀKe2/rn D. ÀKe2/rn2...

5. The charged particle enters the uniform magnetic field in such a way that its initial velocity is not perpendicular to the field the orbit will be__________________?

   A. a circle B. a spiral C. an ellipse D. helix...

6. Light reaches the earth form sun in nearly____________________?

   A. 15 minutes B. 10 minutes C. 8 minutes D. 8 minutes 30 seconds...

7. A body is falling freely under gravity. How much distance it falls during an interval of time between 1st and 2nd seconds of its motion, taking g=10 ?

   A. 15 m B. 20 m C. 5 m D. 25 m...

8. The minimum distance between an object and its real image in a convex lens is_____________?

   A. 2 f B. 2.5 f C. 3f D. 4f...

9. Electron moves in the orbit as________________?

   A. Simple vibratory motion B. Standing wave motion C. Vibratory motion like up and down D. S.H.M likes the sound...

10. Ground state energy of the 4th orbit in a H-atom is_____________?

    A. 13.60 eV B. 3.40 eV C. 0.85 eV D. 1.51 eV...