Answer: Radio signals sent through space
Explanation:
>Radio signals are electromagnetic signals which can travel through space even in vacuum where no air is absent . Radio signals carry energy in the form of electromagnetic wave .
>Thunder heard from many miles away is due to propagation of sound wave in the air or atmosphere . The sound wave carries energy in the form of mechanical energy which can not propagate in vacuum and requires a medium .
>When nuclei of atoms split into parts they fly away from each other with some speed carrying kinetic energy which is a part of mechanical energy .
Thus mechanical energy is involved in all the given examples expect the case of radio signals sent through space.
Answer:
The value is
Explanation:
From the question we are told that
The mass of the block is
The force exerted is
The frequency is
Generally the spring constant of the spring is mathematically represented as
=>
=>
Generally the spring constant is also mathematically represented as
=>
=>
Answer:
The width is
Explanation:
From the question we are told that
The width of the slit is
The wavelength of the light is
The position of the screen is
Generally angle at which the first minimum of the interference pattern the light occurs is mathematically represented as
Where m which is the order of the interference is 1
substituting values
Now the width of first minimum of the interference pattern is mathematically evaluated as
substituting values
Now the width of the pattern's central maximum is mathematically evaluated as
substituting values
Solution:
We have,
Power [P] = 25000 Watt
Mass [m] = 6000 kg
Height [h] = 20 metres
Time [t] = ?
Now,
P = W/t = F x d/t = mxgx h/t
Or, 25000 = 6000 x 10 x 20/25000 [.......g = 10
m/s^2]
Or, t = 6000 x 10 x 20/25000
Or, t = 1200/25
Therefore, t = 48 second
Hence, the required time for the crane to lift the load is 48 seconds.
The decarboxylation reaction involves the removal and replacement of a carboxyl group with hydrogen.
<h3>What is a decarboxylation reaction?</h3>
A decarboxylation reaction is one in which the carboxyl group in a carboxylic acid is replaced with hydrogen.
In living organisms, decarboxylation reactions are catalyzed by enzymes called decarboxylases or carboxy-lyases.
The decarboxylation of beta-carbonyl esters proceeds through a cyclic transition state giving an enol intermediate which then tautomerises to the carbonyl.
Therefore, a decarboxylation reaction involves the removal and replacement of a carboxyl group with hydrogen.
Leran more about decarboxylation at: brainly.com/question/893601