<span>Carl Linnaeus is the answer
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A piece of aluminium with mass 1 kg and density 2700 kg/m3 is suspended from a string and then completely immersed in a container of water. Calculate the tension in the string (a) before and (b) after the metal is immersed.
<h3>ANSWER: 6.296N
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I am unable to add the workings out, however please do message me and I will be able to provide you with them :)
Answer:
h = 20 m
Explanation:
Given that,
Force to lift a firefighter's equipment, F = 270 N
Work done, W = 5400 J
We need to find the height climbed by the firefighter. We know that,
Work done, W = Fd
So,
So, the firefighter climb from a height of 20 m.
In quantum chemistry, when the energy of electron changes by moving from orbital to orbital, it emits or absorbs energy in the form of light. When this happens, you can measure its wavelength. Suppose an atom is heated. This excites the electron so it moves up higher to the next orbital. As a result, it would emit light. When its energy lowers and moves one orbital lower, it would absorb light. The equation to determine the wavelength is called the Rydberg formula.
1/wavelength = R(1/n1^2 - 1/n2^2), where
R is an empirical constant called Rydberg's constant equal to 1.9074 × 10^7 m^-1
n1 and n2 are orbitals of the atoms such that n2 is always greater than n1.
Substituting the values:
1/wavelength = 1.9074 × 10^7 (1/3^2 - 1/6^2)
wavelength = 1.09 × 10^-6 m or 1.09 micrometers
Answer:
v=2.45 m/s
Explanation:
The rotational kinetic energy is calculated with:
The moment of inertia of a disk is:
A point on the rim of a disk will have a speed of:
Putting all together:
Which for our values is:
