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.

Submitted by George K. Your personal AI tutor, companion, and study partner. Ask unlimited questions and get video answers from our expert STEM educators. Millions of real past notes, study guides, and exams matched directly to your classes. A cup of tea cools from 80 C to 60 C in one minute. The ambient temperature is 30 C. In cooling from C o 60 to 50 C it will takE a 30 seconds b 60 seconds c 90 seconds d 50 seconds.

A cup of tea cools from 80 to 60

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Ask your question! Help us make our solutions better Rate this solution on a scale of below We want to correct this solution. Tell us more Hide this section if you want to rate later. Part A By apply the initial boundary condition determine the constant value. Therefore the resulting expression would be, Questions Courses. What will be the of the tea after an hour?

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. When a voltmeter connected across the terminals of cell, measures 5 V and an ammeter connected measures 10 A.

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.

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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:. The physics of hot and cold beverages: a short introduction that will help you understand the problem.

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