Answer:velocity=5.8m/s
Explanation:
Mass(m)=30kg
Kinetic energy(ke)=500joule
velocity=√(2ke ➗ m)
Velocity=√(2(500) ➗ 30)
Velocity=√(1000 ➗ 30)
Velocity=√(100/3)
velocity=5.8m/s
Answer:
E = 2.48 eV
Explanation:
The energy of a photon is given by the following formula:
E = hυ
where,
E = Energy of Photon = ?
h = Plank's Constant = 6.626 x 10⁻³⁴ J.s
υ = frequency of photon = c/λ
Therefore,
E = hc/λ
where,
c = speed of light = 3 x 10⁸ m/s
λ = wavelength of light = 500 nm = 5 x 10⁻⁷ m
Therefore,
E = (6.626 x 10⁻³⁴ J.s)(3 x 10⁸ m/s)/(5 x 10⁻⁷ m)
E = (3.97 x 10⁻¹⁹ J)(1 eV/1.6 x 10⁻¹⁹ J)
<u>E = 2.48 eV</u>
If the index of refraction of air is 1.0001, then the speed of light in air
is (c/1.0001).
That's (299,792,458 m/s / 1.0001) = 299,762,481.8 m/s .
The difference between an electrician and an electrical engineer is the way of working towards a common electrical project.
<h3>What is an engineer?</h3>
An engineer is a person who performs a function like designing, building, or maintaining engines, machines, or structures.
Electrical engineers and electricians both commonly involved in the process of creating and installing critical electrical systems.
An electrical engineer can design electronics and is familiar with the working of electrical parts.
An electrician is much more like a builder. They take the designs from electrical engineer and follow them to create, repair, or revise actual electrical systems.
Thus, the difference between an electrician and an electrical engineer is the way of working towards a common electrical project.
Learn more about an engineer.
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The ball is launched with an upward speed of 50 m/s
2 seconds later it has 30m/s
At 5 seconds it stops
At 6 seconds it’s moving downwards with 10 m/s
At 7 seconds is moving with 20 m/s
