A cup of tea cools from 80 to 60

According to Newton's Law of Cooling, we can find out the time taken by the cup, we have. Last updated on Jan 2, Get Started. SSC Exams.

Then its average rate of cooling is. Here cooling takes place ac cording to Newton's law of cooling. The coefficient of apparent expansion of a liquid when determined usin Three rods of the same dimensions have thermal conductivities 3k , 2k The ambient There is a small hole in a container. At what temperature should it be

A cup of tea cools from 80 to 60

But — disaster — you have already poured hot water onto a teabag! Luckily, maths has the answer. When a hot object like a cup of tea is exposed to cooler air, it will cool down by losing heat. This is the…. Receive a weekly dose of discovery in your inbox! We'll also keep you up to date with New Scientist events and special offers. Explore the latest news, articles and features. Close Advertisement. Subscribe now. Claire Plumridge.

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Sign in ui-button ui-button. General Science Physics. A less than one minute B exactly one minute C nearly one minute D more than one minute. D more than one minute. Add Bookmark. No comments available.

If both gases are considered as ideal, then temperature of mixture is. Helium at 27 0 C has a volume 8 litres. The temperature of the black body at which the rate of energy emission is It will take. Two metal plates having a potential difference of V and 2 cm apart. It is found that a particle of mass 1.

A cup of tea cools from 80 to 60

When the temperature of sink is reduced by 62 o C, its efficiency is doubled. The temperature of the source is:. A gas mixture consists of 2 moles of O 2 and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is. The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T Kelvin and mass m, is. A spherical black body with a radius of 12 cm radiates watt power at K. If the radius were halved and the temperature doubled, the power radiated in watt would be. The value of n is.

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Do you know you can calculate the cooling of the water in your cup of tea? Keep reading our article to learn:.

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