Name the electromagnetic waves, which (i) maintain the Earth’s warmth and (ii) are used in aircraft navigation.
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Name an alloy of (f) aluminium used in the construction of aircraft. (fi) lead used in joining metals for electrical work
(i)Duralium (ii) Solder
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A SONAR (sound navigation and ranging) uses ultrasonic waves to detect and locate objects under water.
Let the distance between the ship and the enemy submarine be ‘S’. Speed of sound in water = 1450 m/s Time lag between transmission and reception of Sonar waves = 77 s In...
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Name the electromagnetic radiation to which waves of wavelength in the range of 10^-2m belong.
Microwave Use: Miscrowave oven or Radar.
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Can you think of any other way in which you use the warmth from your breath?
Another way in which we can use the warmth of our breath is when someone gets swelling and redness in the eyes or some warm breath on a piece of...
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Which of the following waves can be polarized (i) Heat waves (ii) Sound waves? Give reason to support your answer.
(i) Heat waves: As heat waves are transverse or electromagnetic in nature.
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Between India and East Asia, the navigation-time and distance can be greatly reduced by which of the following ?
(b) Opening a new canal in Kra Isthums can reduce the navigation time and distance. The first statement in this question requires an explanation. Its worth note that the Malacca...
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Assertion (A): Radio waves bend in a magnetic field. Reason (R): Radio waves are electromagnetic in nature.
(d) Radio waves are a type of electromagnetic radiation.
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(a) Diamond is used as an abrasive. (b) Al alloy are used to make aircraft body.
(a) Diamond is used as an – abrasive because it is an extremely hard substance. (b) Alloy of aluminum like duralumin is used to make aircraft body due to some of its...
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The Global Navigation Satellite System GLONASS is a Spacebasedsatellite navigation system operated by
Russian federation
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Between India and East Asia, the navigation-time and distance can be greatly reduced by which of the following?
(b) Opening a new canal in Kra isthums can reduce the navigation time and distance. Malacca strait is the main shipping channel between the Indian Ocean and the Pacific Ocean...
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