Answer: The observed frequency is 518.6 Hz
Explanation:
By the Doppler Effect, we know that:
f' = ((v + v0)/(v - vs))*f
where f' is the perceived frequency.
v is the velocity of the wave, in this case 330m/s
v0 is the velocity of the receptor, in this case 0m/s
vs is the velocity of the source, in this case -50m/s (the minus sign is because it is coming thowards us)
f is the original frequency, f = 440hz.
then we have:
f' = 440hz*(330m/s)/(330m/s - 50m/s) = 518.6 Hz
Light refracts in the water that make the object which is partially submerged appear bent when it is really not? Is that what you're going for?
The overall efficiency of the conversion is 6.93%.
<h3>What is the overall efficiency?</h3>
We know that generation of electricity from radioactive fuels is one of the major ways by which we can generate electricity in many countries. Now the efficiency of each of the steps have been shown in the question;
- Conversion efficiency = 35%
- Transmission efficiency = 90%
- Light efficiency = 22%
Overall efficiency = (0.35 * 0.90 * 0.22) * 100 = 6.93%
The energy is obtained from;
6.7X10^13 J * 6.93/100
= 4.6 * 10^12 J
Learn more about nuclear energy:brainly.com/question/12793906
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Missing parts;
The atomic number of uranium-235 is 92, its half-life is 704 million years and the radioactive decay of l kg of 235U releases 6.7X10^13 J. Generally, radioactive material is considered safe after 10 half-lives.
Assume that a nuclear powerplant can convert energy from 235U into electricity with an efficiency of 35%, the electrical transmission lines operate at 90% efficiency, and flourescent lights operate at 22% efficiency.
1.) What is the overall efficiency of converting the energy of 235U into flourescent light?
2.) How much energy from 1 kg of 235U is converted into flourescent light?
The answer is C since the higher up you go the colder it gets which is why Linda will experience colder climates.
<span>Newton established his three laws of motion to understand the motion of objects in a systematic way [ same thing as all Scientists did for human's curiosity ].
His three laws of motion are as follows:
First Law: - </span><span> An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Second Law: - </span><span> The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Third Law: - </span><span>For every action, there is an equal and opposite reaction
Hope this helps!</span>
