Answer:
Explanation:
Heat required to warm the water from 20 degree to 51 degree
= mct
= 131 x 4150 x ( 51 - 20 )
= 16853150 J
Power of heating element
= v² /R
Heat generated in 31 min
= (v² / r ) x 31 x 60 = 16853150
r = (240 x 240 x 31 x 60) / 16853150
6.35 ohm
In this case heat required will change so time will also change
Heat required =
131 x 4150 x ( 100-51 )
= 26638850 J
If time required be t hour
Energy consumed
Power x time
= (v² / r ) x t x 60 = 26638850
t = 26638850 x 6.35 / (240 x 240 x 60 )
= 48.95 h
Heat required to evaporate water at 100 degree
= mass x latent heat
= 131 x 2260000
= 296060000 J
Total heat required
= 296060000 + 26638850 + 16853150
= 339552000 J
time required = 339552000 x 6.35 / (240 x 240 x 60 )
= 623.88 h .
The time taken is approximately 26 minutes
Explanation:
The motion of the body in this problem is a uniform motion (= at constant velocity), therefore we can use the following equation:
![v=\frac{d}{t}](https://tex.z-dn.net/?f=v%3D%5Cfrac%7Bd%7D%7Bt%7D)
where
v is the speed
d is the distance covered
t is the time taken
In this problem, we have
v = 75 km/h is the speed
d = 32 km is the distance to be covered
Solving for t, we find the time needed:
![t=\frac{d}{v}=\frac{32}{75}=0.43 h](https://tex.z-dn.net/?f=t%3D%5Cfrac%7Bd%7D%7Bv%7D%3D%5Cfrac%7B32%7D%7B75%7D%3D0.43%20h)
Converting into minutes,
![t=0.43 h \cdot 60 = 25.8 min \sim 26 min](https://tex.z-dn.net/?f=t%3D0.43%20h%20%5Ccdot%2060%20%3D%2025.8%20min%20%5Csim%2026%20min)
Learn more about speed:
brainly.com/question/8893949
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It obeys law because the physics of quantum space are so slow and small it’s actually really fast
Answer: The force constant of the spring is 116.1N/m
Explanation: Please see the attachments below