Answer:
0.714 m
Explanation:
From the question,
v = λf......................... Equation 1
Where v = velocity of visible light, f = frequency of visible light, λ = wave length of visible light.
make λ the subject of the equation
λ = v/f.................. Equation 2
Given: f = 4.2×10⁸ Hz
Note: Light is an electromagnetic wave, and all electromagnetic waves travels with the same speed (3×10⁸ m/s)
Constant: v = 3×10⁸ m/s
Substitute these values into equation 2
λ = 3×10⁸/4.2×10⁸
λ = 0.714 m
Answer: yes u can use a 6.75 when measuring the pencil
Robert Hooke<span> (1635 - 1703) The Englishman </span>Robert Hooke<span> (18th July 1635 - 3rd March 1703) was an architect, natural philosopher and brilliant </span>scientist, best known for his law of elasticity (Hooke's<span> law), his book Micrographia, published in 1665 and for first applying the word "cell" to describe the basic unit of life.</span>
Explanation:
From the experiment:
Number of protons = 74
Number of neutrons = 110
Number of protons in an element is the atomic number of the element. It is used to locate and position and element on the periodic table.
For a neutral or uncharged atom, the number of protons is the same as the number of electrons.
The element whose number of protons or atomic number if 74 is Tungsten
Mass number = 74 + 110 = 184g/mol
