From the figure shown below, determine the stress of member AB and BC. And calculate the maximum angle of twist of the shaft. 15 kN-m 10 kN-m G = 82.5 GPa IB diameter = 60 mm diameter = 50mm 1.2 m 0.8 m

Children asked their parent for an ice cream after dinner. They eat their ice cream as long as it does not melt and its structure is solid. The parent drove to buy an ice cream in the grocery store. The ice cream is sold in family sized package. The store keeps the ice cream packages in the freezer until it is sold. The packages are made from polystyrene material and their size is 0.2´0.1´0.07 m3 . The store freezer temperature is kept at -10o C. The ice cream has a solid structure (not melting) as long as its temperature remains below 0o C. The time it takes to reach back from the store is 20 minutes Will the kids eat the ice cream at home? Ice cream properties: k = 2.2 W/mo C, C = 1800 J/kgo C, r = 900 kg/m3 and h = 10 W/m2oC.

In the 1970s cartoon The Super Friends, the Wonder Twins helped Superman and others fight crime. One of the Wonder Twins was Zan, who was able to take on the form of H2O in its various phases (ice, liquid water, water vapor). After taking a physics class, he decides to conduct a little experiment by turning into an ice igloo in the park on a hot day. (a) If his total mass as an igloo is 64.50 kg and he starts with a temperature of −13.50°C, how much heat must flow into him to completely melt his body? J(b) He continues absorbing energy up to the point where he would start to vaporize (100.0°C). How much more heat is required to raise his temperature to the vaporization point? J(c) How much more heat is required to turn him into water vapor at 100.0°C? J(d) If we model the water vapor molecules making up his body as having only six degrees of freedom, what is the average kinetic energy of one of the water vapor molecules that make up Zan? (Consider the case when Zan is water vapor at…

Explain the Comparison of magnitudes of various temperature units.

dentify each of the following statements as being most similar to a hypothesis, a law, or a theory. Explain your reasoning. (a) The pressure of a sample of gas is directly proportional to the temperature of the gas. (b) Matter consists of tiny particles that can combine in specific ratios to form substances with specific properties. (c) At a higher temperature, solids (such as salt or sugar) will dissolve better in water.

How Pressure is defined as a normal force exerted by a fluid per unit area.

What’s the correct answer please?

To demonstrate thermal expansion/contraction we saw a video clip with a sphere and ring (like the ones pictured here). The ring was dipped in liquid nitrogen, and then the sphere would no longer fit through it. What could now be done to the sphere so that it would fit through the ring again? O Dip the sphere in liquid nitrogen. O Use a blowtorch to heat the sphere up. O Nothing can be done to the sphere, only the the ring can be altered. O Put oil on the sphere to make it slippery.