Answer:
The force the rock exerts on Sarah =#is 65 N
Explanation:
The given parameters are;
Sarah's weight = 392 N
The force with which Sarah pushes the rock = 65 N
The mass of the rock = 56 kg
The weight of the rock = The mass of the rock × Acceleration due to gravity
∴ The weight of the rock = 56 kg ×9.81 m/s² = 549.36 N
Given that the force Sarah applies to push the rock = 65 N, then by Newton's third law of motion which states that action and reaction are equal and opposite, the force that the rock exert on Sarah is equal an opposite to the force Sarah is applying
Therefore, the force the rock exerts on Sarah = 65 N (in the opposite direction).
When a swimmer is submerged into the water, the Gravitation energy is transformed into Kinetic Energy instead. Consequently, this also means that when the diver/swimmer chooses to get out of the water and becomes free from the water again, Potential Energy is restored. This is because it allows the swimmer to do further tasks.
Hope :) -Emilie Xo this is right and it helps! Xo
Answer:
The electromagnetic radiation with the shortest wavelength are gamma rays.
Explanation:
Photons are the particles that constitute light and its kwnow that lights propagates as electromagnetic waves.
The electromagnetic spectrum is the distribution of radiation due to the different frequencies at which it radiates and its different intensities, that radiation is formed by electromagnetic waves, which are transverse waves formed by an electric field and a magnetic field perpendicular to it.
The distribution of the radiation in the electromagnetic spectrum can also be given in wavelengths, but it is more frequent to work with it at frequencies, the highest being that of gamma rays, followed by X-rays, ultraviolet rays and the visible region , and those of lower frequencies, which correspond to infrared, microwave and radio waves.
The energy given for each wavelength can be found by means of the following equation.
(1)
but 

(2)
Where E is the energy, h is the planck's constant and
is the wavelength.
So, it can be see in equation 2 that when the wavelength increases the energy decreases (inversely proportional).
Hence, the electromagnetic radiation with the shortest wavelength are gamma rays.
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