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vlada-n [284]
3 years ago
11

On land, coal is transported primarily by train. A typical large coal train may be about 1.5 km long and may consist of 120 cars

, each holding 110 tonnes of coal. As each tonne of coal has an equivalent energy content (in terms of the stored chemical energy it contains), a moving coal train represents a flow of (chemical) energy or a power. For a coal train traveling at 100 km/h. Calculate the equivalent power in watts.
Physics
1 answer:
WINSTONCH [101]3 years ago
6 0

Answer:

equivalent power = 6.60 × 10^{12} W

Explanation:

given data

coal train length = 1.5 km = 1500 m

contain = 120 cars

holding= 110 tonnes of coal each

train traveling speed = 100 km/h = 27.78 m/s

to find out

equivalent power in watts

solution

we take here energy produce by coal is 27 ×  10^{6} J/kg

and here total coal = 120 × 110  × 10³ kg

sop here energy produce by total coal is

energy produce by total coal = 27 ×  10^{6} × 120 × 110  × 10³  

and time required to cross that distance is

time = \frac{distance}{speed}    

time = \frac{1500}{27.78}  

time = 53.99 sec

so here equivalent power will be

equivalent power = \frac{energy}{time}  

equivalent power = \frac{27*10^6*120*110*10^3}{53.99}  

equivalent power = 6.60 × 10^{12} W

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