Answer:
Explanation:
Satellite acts as a relay station for earth sources. A transmission station sends the information to the satellite, which in turn retransmits to the receiving stations. The original signal being transmitted from the earth station to the satellite is called uplink of 6 GHz The retransmitted signal from the satellite to the receiving station is called downlink of 4 GH frequency. The transponder is the transmitter-receiver combination in a transponder.
Answer:
True
Explanation:
They are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as cinders around the vent to form a circular or oval cone, making them the simplest out there
In the given reaction potassium metal is placed in water and when a reactive metal is placed in water, it reacts with water to form metal hydroxide and hydrogen gas, as a result, potassium hydroxide and hydrogen gas are produced in the reaction. A redox reaction is a reaction in which a substance is oxidized during the reaction whereas some other substance is reduced during the reaction, simultaneously.
The given chemical reaction is:
2K(s) + 2H20(l) arrow 2KOH(aq) + H2(g)
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Answer: The given statement is true.
Explanation:
Winter solstice is day at the hemispheres where day light is for shortest period and night longs for longest period. It is December 20 on northern hemisphere and 20 June on southern hemisphere.
During this time sun is farthest from the earth's both hemispheres.
Hence, the given statement is true.
Answer:
a) False ( all metals are not magnetic for ex - gold is not magnetic )
b) false ( Diamond is a solid non metal still it shine)
c ) False ( mercury metal is liquid at room temperature)
d) True
e) False (Non metals are bad conductor of heat and electricity )
