Which instrument is used to determine the intensity of colours ?

Answer: Option C

Explanation:

Cathetometer - is used to determine heights,

Chronometer - is used to longitude of a vessel at sea,

Commutator - is used to convert AC to DC.

1. All planets move around the sun in elliptical orbits, with the sun being at rest at one focus of the orbit.

Answer: Option A

Answer: Option D

Explanation:

unit of Momentum is kilogram meter per second,

unit of Moment of Inertia is kilogram square meter,

unit of frequency is Hertz.

In a static liquid at same horizontal level, pressure is more at centre
In a static liquid at same horizontal level, pressure is less at centre.
In a static liquid at same horizontal level, pressure is same at all points
In a static liquid at same horizontal level, pressure is different at all points

Answer: Option C

Answer: Option A

Answer: Option B

Explanation:

Orbital speed of a satellite is independent of its mass.