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Posted By: Jaseem Member Level: Bronze Posted Date: 21 Feb 2008 Category: Physics

thermodynamics

A body cools from 50°C to 49.9°C in 5 s. How long will it take to cool from 40°C to 39.9°C? Assume the temperature of the surroundings to be 30°C and Newton’s law of cooling to be valid.

Select Answer:

2.5 s
5 s
20 s
10 s
15 s

Your Test Score: 0 / 0

Next Question: electricity

Previous Question: A ball of 1 kg is placed on a spring balance. Suddenly the ball jumps upwards. When it happens the reading of the spring balance changes from 1 kg to 1.10 kg. What will be the maximum value of the upward acceleration of the ball? Take g=10ms2

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