Mechanical waves waves need to interact with particles of either a solid, liquid, or gas to travel.
<u>Explanation:</u>
In the world, the dispersal of energy is under the control of two important waves called electromagnetic waves and mechanical waves. Waves in water and sound waves in air are two instances of mechanical waves. Mechanical waves are brought about by an unsettling influence or vibration in particles of either a solid, liquid, or gas to travel.
Water waves are formed by vibrations in a fluid and sound waves are shaped by vibrations in a gas (air). These mechanical waves travel through a medium by making the atoms to interact with one another.
Answer:
A-2
B-4
C-1
D-3
Explanation:
In description A, the car is first moving at a constant speed, which means it will have a constant slope. Then, it stops, which causes a slope of 0. Finally, it moves in the opposite direction, which will cause a negative slope. The second graph has a positive, zero, and negative slope; therefore, it fits A.
Description B has a constant slope, a zero slope, and a higher slope. Graph 4 goes up normally, then stops, and finally goes steeper. This fits description B.
Description C has a constant and then a higher slope. Graph 1, increases steadily and then sharply increases; which fits C.
Description D has a constant and then a lower slope. Graph 3 increases fast but then flattens, which matches the slopes in the description.
Explanation:
Incinerators are not helpful in reducing pollution as they produce a lot of ash and smoke so it increases the air pollution by burning of waste.
Solar and wind energy are the clean source of energies replacing the fuels. Catalytic converters reduce the air pollution from the exhaust fumes of vehicles.
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Answer:
Explanation:
IV- temperature
DV- amount of bacteria placed on gel
