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

A cylindrical glass flask with a diameter of 8 cm and the height of 20 cm is fully filled with water at 20°C. When the temperature of the water (and consequently the inner surface of the flask) is raised to 100° C, determine the volume of the water that overflows? HINT 1: Don't forget to calculate the initial volume of the water and flask HINT 2: The volume expansion coefficient for ordinary glass and water can be found in the table of Week 4 (Slide #20). HINT 3: Calculate the volume expansions for both water and the flask HINT 4: The difference between the final volume of water and the final volume of the flask is the amount of overflow. PLEASE UPLOAD YOUR HANDWRITTEN SOLUTION BY CLICKING ON THE "ADD A FILE" BUTTON.

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Suppose a walrus transfers energy by conduction through its blubber at the rate of 165 W when immersed in -0.95°C water. The walrus’s internal core temperature is 37.0°C, and it has a surface area of 2.1 m2  What is the average thicness of its blubber, in centimeters, which has the conductivity of fatty tissue?

I need help with correcting this problem. I am at a loss on what I'm doing wrong.

In this problem you will consider the effect that thermal expansion due to temperature will have on Archimedes' principle. Take the densities of water and copper at 0ºC to be 1.00 × 103 kg/m3 and 8.90 × 103 kg/m3, respectively. a.  Calculate the fraction of a copper block’s weight that is supported by the buoyant force at 0°C.  b. Calculate the fraction of a copper block’s weight that is supported by the buoyant force at 95°C. Assume the volume expansion coefficient of copper is βC = 5.10 × 10-5 1/°C.

Your car’s radiator is made of steel and is filled with coolant. You fill the radiator to the very top with coolant, then drive off without remembering to replace the cap. As the coolant and steel radiator heats up, will the level of coolant drop or rise and overflow? why? what is a radiator is and what purpose does it serves in a car?  Here is a good start: https://youtu.be/y5p31F_dVJU