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Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a total of 20 rubs, at a distance of 7.50 cm per rub, and with an average frictional force of 40.0 N, what is the temperature increase? The mass of tissues warmed is only0.100 kg, mostly in the palms and fingers.

$\Delta T=0.171^{0} \mathrm{C}$

Physics 101 Mechanics

Chapter 14

Heat and Heat Transfer Methods

Thermal Properties of Matter

University of Washington

Simon Fraser University

University of Winnipeg

Lectures

02:20

A solid, liquid, or gas is one of the three main states of matter. Solids have a definite shape and volume, and retain their shape when a force is applied to them. They are rigid, and do not flow to take on the shape of a container, but retain their own shape. Solids are held together by intermolecular forces, which are usually chemical bonds. Liquids have a free-flowing, continuous surface, and take the shape of a container. They flow to fill an available space. Their particles do not have a definite shape or volume, and they are not rigid. Gases have no definite shape or volume. They are not held together, and are not rigid. They flow to fill an available space. Gases are often described as being the state of matter with the lowest density.

06:13

Matter is a state of aggregation for a collection of atoms, molecules, ions, or particles. It is a general term for the substance of which all physical objects consist.

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toe. Answer this question. Let's first find out how much energy is being created or transferred to the hand dishes. So energy is work done by you old by the woman. In this case, work done is force times the displacement delta. It's now let's find the Delta X The displacement. First it says that each her up is off 7.5 centimeter. So to convert it into to have it in terms of proper units, let's write it. 0.75 in terms of meters now, times 20 it ups. It gives you 0.75 times 20 is 1.5 meters. So to convert centimeters to meet her, I have used the fact that one meter is 100 centimeters. 01 centimeter is 0.1 meter. Now we know Delta X. Also vino force forces 14 mutants. So 40 times 1.5 is equal to 60 juice. Now the heat transfer equation is given by mass times. Um, specific heat times change in temperature. This is the question we need because we need to find the change in temperature. Now we need to quit work should cube. So if you do this, you will see that it is M. C. Delta T equal to 60. Jules, now the mass who she's being hated is 0.1 kilogram. So let's substitute that 0.1 on dhe see Value of C is given on the AP College physics page number 5 90 It is given US 3500 human body specific it June's per kilogram politically Celsius. So 3000 500 times the delta T, which is the quantity we need to find now to find entity or we have to do is divide 60 by 600.1 and 3500. If you do that, you will get 0.1714 degree census or degree. Kelvin, because it's a change in temperature doesn't matter which which unit you use. You can't use degree Celsius. So did you kill me? You cannot use Fahrenheit, though, so we need to keep only three significant digits. So we will write. It has 1.0 point 171 Dude who says yes, thank you

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