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Answer:
c. Both require the same amount of work
Explanation:
GPE = mgh
50 * 10 * 2 = 1000 J
25 * 10 * 4 = 1000 J
Therefore, both are same and require the same amount of work.
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Answer: radius of the chamber = 2.0m
Centripetal force acting on the person = 2500N
Explanation:
Radius of the chamber/room is given and its =2.0m
Calculating centripetal force Fc,
Fc=MV2/r
Where M is mass of the person r = radius of the room
Fc = 50kg× 10 × 10/2m = 2500N
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Energy absorbed by the radiologist is 1.775*10^-6J.
To find the answer, we have to know about the radiation.
<h3>How much energy has she absorbed?</h3>
- We have the expression for dose of absorption as,
![D=\frac{E}{m}](https://tex.z-dn.net/?f=D%3D%5Cfrac%7BE%7D%7Bm%7D)
where; E is the energy absorbed and m is the mass of the body.
- From the above expression, substituting appropriate values given in the question, we get,
![E=D*m=2.5*10^{-6}J/kg*71kg=1.775*10^{-4}J](https://tex.z-dn.net/?f=E%3DD%2Am%3D2.5%2A10%5E%7B-6%7DJ%2Fkg%2A71kg%3D1.775%2A10%5E%7B-4%7DJ)
Thus, we can conclude that, the Energy absorbed by the radiologist is 1.775*10^-6J.
<h3 />
Learn more about the radiation here:
brainly.com/question/24491547
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Answer: Speed can equal to velocity, even though they have different formulas.
Explanation: Speed is the rate at which an object covers distance or how much space the object passed, which is usually measured in miles, meters, or kilometers. Velocity is the rate at which the position changes. Therefore, speed is and can equal to velocity.
<u>Formulas:</u>
Speed = distance/change in time
Velocity = change in distance/ change in time