Answer :
Explanation :
It is given that,
length of pendulum, l = 0.6 m
Number of oscillation, n = 20
time, t = 35.5 seconds
so, Time period, 
we know that the time period of pendulum is given by
or
Answer: The correct answer is vacuum.
Explanation:
Sound wave is a longitudinal wave in which the particles vibrate parallel to the direction of the motion of the wave. Sound wave consists of compression and rarefaction.
It needs a medium to travel. It can travel in solid, liquid and gas. It cannot travel in vacuum.
Denser the medium, more will be the speed of the wave.
Solid is more denser in comparison to liquid.
The speed of the sound in the solid medium is more in comparison to the liquid. The speed of the sound in liquid is more than the speed in the gas.
Therefore, vacuum is least effective medium for traveling sound waves.
The trachea is a tube that carries air inside the lungs.
a. chlorofluorocarbons
Explanation:
The chemical reaction describes the combination of chlorofluorocarbons with ozone.
Reaction 1: ClO + BrO ⇒ Cl + Br + O₂
Reaction 2: Cl + O₃ ⇒ ClO + O₂
Reaction 3: Br + O₃ ⇒ BrO + O₂
O₃ is the ozone molecule, the Cl, and Br are the chlorofluorocarbons.
- In this reaction, ozone is converted into oxygen gas. This reaction takes place in the stratosphere.
- This leads to the penetration and creation of a hole in the atmosphere which allows for ultraviolet rays to reach the earth surface.
- The chlorofluorocarbons are produced on the earth surface in component gases used for making refrigerants, car sprays, air conditioners etc.
- When the reach the ozone layer, they react with it and produce oxygen gas.
learn more:
Ozone brainly.com/question/12685482
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True, the manipulated variable is plotted on the horizontal axis
