Hot Coffee

Classical Mechanics Level 1

John makes a cup of coffee, which is initially at a temperature of \(90^\circ\text{C}\). After 5 minutes, he notices that its temperature has dropped to \(80^\circ \text{C}\). How much more time will it take for the temperature of the coffee to further drop to \(70^\circ \text{C}\)?

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Hot Coffee

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.