3 years ago

The once-ler used what to make thneeds

Physics

1 answer:

Bogdan [553]3 years ago

6 0

He used truffula trees to make thneeds

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If the diameter of each of a car's wheels is 0.4 meters, approximately, what was the average speed of the car for its three-hour

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Answer:

42 km/h was the average speed of the car for its three-hour trip.

Explanation:

Diameter of the car wheel = d = 0.4 m

Radius of the car wheel = r = 0.5 d = 0.5 × 0.4 m =0.2 m

Distance covered in 1 complete revolution = $2\pi r$

Distance covered in 100,000 complete revolution,D = $2\pi r\times 100,000$

$D=2\times 3.14\times 0.2 m\times 100,000=125,663.71 m$

1 m = 0.001 km

125,663.71 m = 125,663.71 × 0.001 km = 125.66371 km

Time taken to complete 100,000 revolution by a wheel = t = 3 hours

Speed of car : S

$S=\frac{125.66371 km}{3hours}=41.89 km/h\approx 42 km/h$

42 km/h was the average speed of the car for its three-hour trip.

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where as activation energy of the product and the reactant decreases.

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here activation energy decrease whereas change in enthalpy remains same.

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