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Which has the greater density, a lake full of water or a cup full of lake...
An object that can float in both water and in oil that has a density less than water. The buoyant force experienced by the object A) Is greater when it is floating in water than in oil B) Is greater when it is floating in oil than in water C) Is the same when it is floating in water or oil
Water (density 998 kg/m', absolute viscosity 1.12x10 Ns/m2) is pumped from a lake into a reservoir at a rate of 0.7 m/s. The water flows through a re-entrant opening, a valve, and a sharp-edged exit, which have loss coefficients of 0.8, 10, and 1, respectively. The pipe has an absolute roughness of 1x104m and di of 0.30 m. The pump efficiency is 65%. A) Is the flow in the pipe laminar or turbulent? (2 points) B) What is the power...
These samples of metals have the same mass. Which has the greater density? O Densities are equal
A person was standing near the edge of a lake drinking a cup of very hot coffee (just below boiling). They then noticed fishermen cutting holes through the ice covering the surface of the lake. Do you think that the cup of hot coffee, or the ice contains more heat energy? Or do you think that they have the same heat energy? Briefly state your choice, then explain why you chose this answer.
Introduction If a cup of cold water is mixed with a cup of hot water, the final temperature of the mixture will be between the two initial temperatures. Using information on the temperature and volume of the hot and the cold water, the final temperature of the mixture could be predicted. This virtual experiment involves mixing of equal volume of cold and hot water and prediction of the final temperature of the mixture. Procedure Step 1 To get equal volume...
Assume Lake Ontario contains 1.60 ✕ 1012 m3 of water, and assume the water's density is that of water at 20°C and 1 atm. (a) How much energy (in J) is required to raise the temperature of that volume of water from 18.0 degree C to 25.6 degree C? (b) How many years would it take to supply this amount of energy by using a power of 1,400 MW generated by and electric power plant? (in yr)
Help with thermodynamics basics? Due at midnight, please help! refer to a cup which contains water at room temperature. The cup is perfectly insulated so that no heal can transfer into or out of the cup. A small coffee cup heater inside the cup is used to transfer heat to the water. The water does not boil. If heat is transferred to the cup at a steady rate, which of the graphs below best represents the shape of the graph...
An empty Styrofoam cup has a mass of 8.655g. When the cup is completely fill with water (density =0.9971g/ml), the mass is 21.312g. When the cup is emptied of water and then filled with an unknown liquid, the new mass is 29.293g. What is the density of the unknown liquid to the proper number of significant figures? Show your work.
5) rain drop falls because the density of liquid water is much greater than the density of the air. Assume a raindrop is spherical and has a diameter of 5mm. Determine its terminal velocity. Use the following procedure: a. Guess a velocity and compute the Re. b. Compute the Co. c. Use Figure 12.4 to see if your computed Co matches the correct Co for that Re. If not give an improved guess for your velocity. Continue this process until...
Crater Lake in Oregon is the deepest lake in the United States, with a maximum depth of 655 m. The density of freshwater is 1.00 ✕ 103 kg/m3. (a) If the air pressure above the lake, which has a surface altitude of 1800 m, is 8.00 ✕ 104 Pa, what is the absolute pressure at the bottom of the lake? (b) What is the force of the lake's water on each window of a submarine near the lake bottom if...