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Water circulates throughout a house in a hot-water heating system. If the water is pumped at a speed of 0.50 m/s through a 4.00 cm.diameter pipe in the basement under a pressure of 3.00 atm.
A battery has an emf of 12 V and an internal resistance of 0.16 O. Its terminals are connected to a load resistance of 1 O. Find the power dissipated in the load resistor.
Esterification using carboxylic acid andalcohol requires an acid catalyst.In an experiment the acid form ofan ion-exchange resin is used. This resin, in the form of smallbeads, is a cross-linked pol
Calculate the initial and final momentum of two colliding objects and demonstrate that the momentum is conserved in a collision between two objects. Compare two quantities by calculating a ratio.
What are the intermolecular forces of naphthalene and benzil and why will benzil dissolve in naphthalene (use intermolecular forces to explain)?
What area must a heating duct have if air moving at 3.00m/s along it can repenish the air every 15 minutes in a room of volume 300m3. Assume the ari's density remains constant. Please show the work.
You dissolved a small amount of your product (sodium thiosulfate crystals) in about 5 mL of distilled water in a test tube. You then added about 1 mL of 6M HCl solution and finally you heated the fi
Balance the following equation and write in molecular as andnet ionic form. Identify as an acid-base reaction,precipitate reaction , an oxidation-reduction reaction, or as a combination of one of th
A 440-Hz tuning fork is held over the open top of a glass test tube held vertically. Water is added to the tube until the air column inside it is in resonance with the vibrations of the tuning fork.
A satellite orbits a planet at a distance of 6.85 108 m. Assume that this distance is between the centers of the planet and the satellite and that the mass of the planet is 3.85 1024 kg. Find the pe
What would be the molarity of a saturated aqueous solution ofNaI prepared at 25 degrees C, assuming that the added NaI does notadd significantly to the volume of water?
Find the coefficient of friction of the surface. (Assume friction is the only horizontal force. Show a force diagram and write down he equations for Newton's second law.)
A resistor of 8 ohms, a resistor of 14 ohms, and a resistor of 24 ohms are connected in parallel to an battery of unknown voltage. If the power dissipated by the 14 ohm resistor is 27 Watts, what is
Calculate the freezing point depression of liquid mercury caused by dissolved sodium if the mole fraction of sodium is0.0477. For Hg(l),
A few lightbulbs are connected in parallel to a battery of 15.3 volts. With all the lightbulbs the power output of the battery is 100 Watts. One of the bulbs goes out and the the power output of the
Calculate the osmotic pressure, freezing point and boiling point of seawater, which you can assume is a 1.08 msolution of NaCl(aq).
A tank with a volume of 0.150 m3 contains 27.0oC helium gas at a pressure of 100atm. How many balloons can be blown up if each filled balloon is a sphere 30.0 cm in diameter at 27oC and absolute pre
Given a saturated solution of of calcium carbonate , how many moles of calcium ion will remain in solution after the addition of3.16 * 10^-4 M of Na2CO3 at 25 degrees celsius? (Assume thepH does not
A 450 g damp shirt rotates against the wall of a washing machine at 320 rpm. The diameter of the rotating drum is 70 cm. What is the magnitude and direction of the resultant force on the shirt?
A large spherical balloon of a diameter 12 m has hot air at 1 atm and 60 oC. Calculate the maximum weight the balloon can lift, (molecular weight of air is 29). The outside air temperature is 25oC.
When a 0.3044-g sample of an unknown organic substance issimilarly burned in the same calorimeter, the temperature rises by3.72 °C. What is the energy of combustion per unit mass of the unknown
The temperature of the earth's atmosphere drops about 5°C for every 1000 m of elevation above the earth's surface. If the air temperature at ground level is 15°C and the pressure is 760 mmHg
What is the average power supplied by the tree, if evaporation occurs only during 12 h of day light?( Hint first how much energy must be supplied)
a) What mechanical energy is dissipated by the frictional force in stopping the block? b) What was the maximum kinetic energy of the block? c) Through what distance was the spring compressed?
A 1.52-kg block accelerates uniformly from rest to a speed of 13.8m/s in 1.86s a) How much work was done on the block ? b) What average power was used? c) What force was applied to the block?