Answer :
Exothermic reactions are those reactions in which a system releases its heat energy to surroundings whereas during endothermic reactions a system absorbs heat energy from surroundings.
Explanation :
Five exothermic reactions that are going on around us
a) Making of ice cubes
b) Rusting of iron
c) Nuclear fission reaction
d) Cellular respiration
e) Condensation of water vapor to form rain.
Following are some endothermic reactions;
1) Photosynthesis
2) Mixing of water in Ammonium Nitrate
E.S.D. (Electrostatic discharge) is the sudden spurts of electricity between two or more electrically charged objects. So that build up of static electricity can be formed by tribocharging, or rubbing the two objects together really fast. so the answer is static.
Answer:
Explanation:
The momentum of an object is given by:
, where is the mass of the object and is the velocity of the object.
a)
The mass of the child and bike together is kilograms. Since they're moving at a velocity of 5.0 m/s, their momentum is:
.
b)
The mass of the child is given as 19 kg. Since the child is on the bike moving at 5.0 m/s, it's implied the child is as well. Therefore, the momentum of the child is:
.
c) The mass of the bike is given as 5.6 kg and it is moving at 5.0 m/s. Therefore, the momentum of the bike is:
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