Answer:
From the second law of motion:
F = ma
we are given that the force applied on the block is 20N and the block accelerates at an acceleration of 4 m/s/s
So, F= 20N and a = 4 m/s/s
Replacing the variables in the equation:
20 = 4* m
m = 20 / 4
m = 5 kg
40kg
Explanation:
Given parameters:
Kinetic energy = 500J
Velocity = 5m/s
Unknown:
Mass of the object = ?
Solution:
Kinetic energy is the energy due to motion of a body. It is expressed as:
K.E = 
mv²
m is the mass of the body
v is the velocity
To find the mass, make it the subject of the expression:
m = ![\frac{2 K.E}{v[tex]^{2}](https://tex.z-dn.net/?f=%5Cfrac%7B2%20K.E%7D%7Bv%5Btex%5D%5E%7B2%7D)
}[/tex]
m = ![\frac{2 x 500}{5[tex]^{2}](https://tex.z-dn.net/?f=%5Cfrac%7B2%20x%20500%7D%7B5%5Btex%5D%5E%7B2%7D)
}[/tex] = 40kg
Learn more:
Kinetic energy brainly.com/question/6536722
#learnwithBrainly
Answer:
there are two main type of root systems.
One must have at least two visual pigments to distinguish between wavelengths independent of light intensity.
A substance that converts light energy into electrical potentials is called a visual pigment.
The basic structure of pigment consists of the chromophore, a colored molecule, and a protein called rhodopsin.
There are three types of visual pigments: Scotopsin, rhodopsins, and photopsin.
Scotopsin pigments are associated with vision and operate in less bright light while photopsin operates in a brighter light.
However, visual pigments are very significant substances as they are associated with vision and play a vital role in detecting light.
If you need to learn more about the wavelength of light click here:
brainly.com/question/9807579
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