All planets move around the sun in elliptical orbits, with the sun being at rest at one focus of the orbit.
True
False
Answer: Option A
Similar Questions :
1. The force which opposes the relative motion between different layers of liquid or gases is called
Critical Velocity
Streamline Flow
Terminal Velocity
Viscous Force
Answer: Option D
Explanation:
Critical Velocity - The maximum velocity upto which fluid motion is streamline is called Critical Velocity.
Streamline Flow - If velocity of all fluid particles is same all the time then it can be said in streamline flow.
Terminal Velocity - When a body falls in viscous medium, its velocity first increases and finally becomes constant. The constant velocity is called terminal velocity.
2. Which instrument is used to measure pressure of gases ?
Manometer
Machmeter
Magnetometer
Micrometer
Answer: Option A
Explanation:
Machmeter - is used to determine the speed of an aircraft in terms of speed of sound,
Magnetometer - is used to compare magnetic movements and fields,
Micrometer - is used to convert sound waves into electrical vibrations.
3. Which instrument is used to measure altitudes in aircraft's ?
Audiometer
Ammeter
Altimeter
Anemometer
Answer: Option C
Explanation:
Ammeter - Measures strength of electric current.
Audiometer - Measures intensity of sound.
Anemometer - Measures force and velocity of wind and directions.
4. Which are the primary Colours ?
Yellow, Green, Blue
Red, Magenta, Blue
Red, Green, White
Red, Green, Blue
Answer: Option D
Explanation:
Red, Green, Blue are primary colours. All the colours can be produced by them by mixing in different proportions. Interesting :)
5. Which of the following is an electromagnetic wave ?