to loosen the metal lid on a hard-to-open glass jar by running hot water over top of it for a few moments. Why does this happen and what doe

Q: A 5-meter long Brass rod with a diameter of 0.01 meter increases in length by 0.05 m when its…

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Q: If you touch the metal sides inside of an oven with a bare hand, you’re in trouble. But hold your…

A: Metals have more free electrons to carry energy, in order, to conduct electricity. That is why…

Q: When you blow on the back of your hand with your mouth wide open, your breath feels warm. But if you…

A: When we blow out air keeping your mouth wide open your hand feels hot because the air has the…

Q: An incandescent lightbulb generates converts only about 5% of the electrical energy into visible…

A: Given: Heat generated by bulb, H = 95 W Radius of bulb, r=3.0 cm Thickness, t=0.50 mm.   To…

Q: When you use a hand pump to inflate the tires of your bicycle, the pump gets warm after a while.…

A: Solution:- Before proceeding to the answer let's see about the adiabatic process, as it plays a…

Q: Water has a lower boiling point at higher elevations. As a result, it generally takes longer to…

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Q: A man is knitting his wife a sweater in his 18°C air-conditioned living room with 0.3m long aluminum…

A: Given: Initial temperature of the needle is T0 =  18°C {air-conditioned living room}  Original…

Q: An engineer works in an automobile company where engines are designed. You are asked to design…

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Q: Questions and Discussion points. Question 1: You have a box with sides of length L = 10 m. This box…

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Q: The coefficient of linear expansion for a certain metal is 19 x 10-6 per degree Celsius. A 2.0…

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Q: Suppose you inflate your car tires to 35 psi on a 20°C day. Later, the temperature drops to 0°C.…

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Q: Hot air balloons float because the air inside an inflatable compartment is heated. Consider such a…

A: Given that, the maximum volume of the balloon is V=2160m3 and the total mass of the basket and…

Q: Consider a metal rod with the original length L=2.0m and cross-sectional area A=0.01m². The linear…

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Q: An aluminum cup of 140 cm³ capacity is completely filled with glycerin at 25°C. How much glycerin…

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Q: A bubble of air is rising up through the ocean. When it is at a depth of 28.0 m below the surface,…

A: Given Information :Initial depth h =28 mInitial Temperature T1 =50C = 278 KInitial Volume V1 =0.8…

Q: Your granny normally took a hot 2L hot water bottle (covered with a thin towel and at 50 degrees…

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Q: A scuba diver has his lungs filled to half capacity (3 liters) when 10 m below the surface. If the…

A: The capacity/volume of the lungs inside the water at a depth h , V1=3 L Height below the surface of…

Q: The brass bar and the aluminum bar in the drawing are each attached to an immovable wall. At 28.4 °C…

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Q: What is the coefficient of volume expansion for a material that has a coefficient of linear…

A: Given: The coefficient of the linear expansion is 1.5x10-5 /oC.

Q: You visit your friend and find her in her kitchen with a rubber ball and a bucket of ice water…

A: Here she said that she wanted to know how high a rubber ballbounces is affected by its temperature.…

Q: The human body can cool itself by evaporation, usually in the form of sweat. Consider this cooling…

A: Given: Mass of woman m=63.5 kg, Temperature change ∆T=0.95°C, Specific heat of human body c=3500…

Q: An ice cube and a stone are put in two different glasses of coke. If we know that temperatures of…

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Q: 21 I Review I C Part A A 25-cm-long glass stirring rod at a laboratory temperature of 20° C is…

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Q: An engineer wants to design a structure in which the difference in length between a steel beam and…

A: The difference in length between the two beams is due to the difference in their thermal expansion.…

Q: FIFA states that the air pressure of a regulation soccer ball must between 8.5psi and 15.6 psi.  An…

A: Scenario: Air regulation pressure of soccer ball is b/w 8.5 psi & 15.6 psi. All the soccer ball…

Q: A cold block of metal feels colder than a block of wood at the same temperature. Why? A hot block of…

A: The metal block conducts heat from hand to the block. When the hand is in contact with metal block…

Q: In an insulated container, you combine hot metal with ice. The ice starts at -20 degree C. The…

A: Given : Temperature of ice, Ti = -20oC Temperature of copper, Tc = 900oC Mass of copper, m = 15 kg =…

Q: An ice bag containing 0°C ice is much more effective in absorbing heat than one containing the same…

A: Q =mc(∆T) =(0.9)(4.186)(25-0) = 94.185 kJ = 94185 J