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- In winter, it is often warmer in San Francisco than in Sacramento, 150 km inland. In summer, it is nearly always hotter in Sacramento. Explain how the bodies of water surrounding San Francisco moderate its extreme temperatures.What is the change in length of a 3.00-cm-long column of mercury if its temperature changes from 37.0 to 40.0 , assuming the mercury is constrained to a cylinder but unconstrained in length? Your answer will show why thermometers contain bulbs at the bottom instead of simple columns of liquid.In a physics classroom demonstration, an instructor inflates a balloon by mouth and then cools it in liquid nitrogen. When cold, the shrunken balloon has a small amount of light blue liquid in it, as well as some snow-like crystals. As it warms up, the liquid boils, and part of the crystals sublime, with some crystals lingering for a while and then producing a liquid. Identify the blue liquid and the two solids in the cold balloon. Justify your identifications using data from Table 1.4.
- How much heat is required to convert 1 kgof ice at 0 °C to steam at 100 °C?Lf= 3.34 x 10 ^5 J/kgLv = 2.26 x 10^6 J/kgC of water = 4186 J/kg°CSupposed your refrigerator can remove heat at a power of 100 watts (100 joules per second), how long will it take to cool a liter of water from room temperature to 5°C? ( (Assuming the water is the only thing inside the fridge.) Hint: 1 calorie = 4.184 joulesplease give answers to all questions. because these are amall questions. it is my humble request dear respected expert...please (1) A sphere of radius 0.500 m, temperature 27.0 C, and emissivity 0.850 is located in anenvironment of temperature 77.0 C. At what rate does the sphere (a) emit and (b) absorbthermal radiation? (c) What is the sphere’s net rate of energy exchange? (Stefan Boltzmannconstant) = 5.67 x 10–8 W/m2 K4 (2) A copper rod 24 cm long has cross-sectional area of 4 cm2. One end is maintained at24°C and the other is at 184°C. What is the rate of heat flow in the rod? The heatConductivity of copper is 397 W/m · °C. (3) At 20 C, a brass cube has edge length 30 cm. What is the volume of the cube when it isheated from 20 C to 75 C? Coefficient of linear expansion of brass is 19 x 10-6C-1
- A quantity of mercury occupies 486.6 cm3 at 0°C. What volume will it occupy when heated to 79.37°C? Mercury has a volume expansion coefficient of 180 × 10-6 K-1. Give your answer in cm3 and report 4 significant figures.Consider a 40,000 km steel pipe in the shape of a ring that fits snuggly all around the circumference of the Earth. We are heating now the ring so its temperature increased by 1 degree C. Now, the pipe will no longer be snug. How high the ring will now stand above ground level? (Make as many simplifications as necessary). Data: Coefficient of linear expansion for steel is 11*10-6 /degree C. This means, for example, that a 1-meter bar of steel that increases its temperature by 1 degree C will expand 11*10-6 meters (11 micrometers)1) Lake Erie contains roughly 4.00 x 1011m3of water. How much energy is required to raise thetemperature of that volume of water from 11.0°C to 12.0°C? How many years would it take to supplythis amount of energy by using the 1 000-MW exhaust energy of an electric power plant? 2) A scientist is trying to determine the specific heat of 10.0 g of an unknown substance. He heats up the substanceto a temperature of 100.0 C, and places it in 1.02 kg of water at 22.0 C. He notices that the final temperature ofthe water and substance is 23.1 C. What is the specific heat of the substance? 3)A 68 kg diver drops from a height of 12 m. What is her speed as she hits the water? 4) An incandescent bulb has a power rating of 75 W but is only 5 % efficient. How much energy is converted intolight if the bulb is run for 6.0 s ? 5) Determine the coefficient of friction for a floor if 550 J of work are done moving a 12 kg box 10.0 m at aconstant velocity. 6)About how much power does a70 kg sprinter…
- What amount of heat must be supplied to 2.0 × 10-2 kg of nitrogen (at roomtemperature) to raise its temperature by 45 °C at constant pressure ? (Molecular mass of N2 = 28; R = 8.3 J mol-1 K-1).A container used to store ice is made of wood 5.0 m thick and has an effective area of 12,000 cm² and thermal conductivity of 0.00027 cal/cm²- sec-⁰C/cm. How much ice inside the box would be melted each 24-hour day if the outside temperature is 25⁰F and the temperature inside the box is 5⁰F.Heat transfers by conduction through a glass window, connecting a 22 C room to a 36 C summer day outside. If the area of the window is 0.75 m2, the thickness of the glass is 0.5 cm, and the thermal conductivity of glass is 1.0 J/s m K, how much heat transfers through the window each second?