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Four electrical components are connected to a 120v household circuit. The light bulb dissipates 100W, the electric heater 1800W, the stereo 350W, and the hair dryer 1200W.
If 50 mL of water at 22.3 degrees Celsius is mixed with 50 mL of water at 47.7 degrees Celsius in such a way that no heat is lost to the environment, what will be the temperature of the final mixtu
At 450°C ammonia gas decomposes into hydrogen and nitrogen gases. An experiment starts by placing 2.25 moles of ammonia in a3.00 L container and heating it to 450°C.
The car reached point A 20.0 seconds after passing point B. The car's speedometer indicated a speed of 40.0 m/s when it reached point A a) What was the car's instantaneous speed at point B?
A small sample of wood from an archeological site in Clovis,New Mexico, was burned in O2, and the CO2 produced was bubbled through a solution of Ba(OH)2 to produce a precipitate of BaCO3.
A 7.5nC charge is located 1.8m from a 4.2nC charge. Find the magnitude of the electrostatic force that one charge exerts on the other. Is the force attractive or repulsive?
When measured in a 1.00 cm cuvet, a 8.50 X 10-5M solution of species A exhibited absorbances of 0.129 and 0.764 at475 nm and 700 nm,respectively. A 4.65 X 10-5 M solutionof species B gave absorbance
A polar bear of mass 510 kg is floating on an iceberg in the ocean. As the ice melts, how small can the iceberg get before the bear gets wet feet? (Your answer should be the volume of the iceberg).
Two locomotives approach each other on parallel tracks. Each has a speed of v=85km/h with respect to the ground. If they are initially d=6.5 km apart, how long will it be before they reach each othe
A battery is constructed based on the oxidation of magnesium and the reduction of Cu2+. The initial concentrations of Mg2+ and Cu2+are 1.0*10^-4 M and 1.4 M, respectively, in 1.0 Lhalf-cells.
The acceleration of gravity is 9.81 m/s2 . If the coefficient of kinetic friction between the box and ramp is 0.28, calculate the change in the box's kinetic energy.
At half equivalence 12.65 mL of 0.0395 NaOH is titrated with a10.00mL of a weak acid of unknown concentration. The titration reaches equivalence once 25.3 mL of NaOH have been added.
A 300 m tall-tower is built on the equator. How much faster does a point at the top of the tower move faster than a point at the bottom? The radius of the Earth is 6400000m.
The first displacement is 4.00 m westward, and the second is 10.0 m northward. Use the graphical method to find the magnitude and direction of the third displacement.
Secretariat ran the 1.25 mi long Kentucky Derby with times of 25.4 s, 24.4 s, 23.7 s, 23.2 s, and 23.5 s for each of the quarter mile segments. (a) Find his average speed during each quarter-mile se
If the bowls are in an equilateral triangle (with sides 0.50 m) what is the magnitude of the net force on Baby Bear's bowl?
Review of McMurry Section 2.9 shows that an equilibrium between two acids will result in the equilibrium favoring formation of the weaker acid (lower pKa value).
A train traveling at a constant speed rounds a curve radius 275 meters. A chandelier suspended from the ceiling swings out to an angle of 17.5 degrees from the normal throughout the turn. What is th
A cart is propelled over an xy plane with acceleration components ax = 5.5 m/s2 and ay = -2.0 m/s2. Its initial velocity has components v0x = 8.0 m/s and v0y = 12 m/s. In unit-vector notation, what
After landing, a jetliner on a straight runway taxis to a stop at an average velocity of -35.0 . If the plane takes 7.00 to come to rest, what are the plane's initial velocity and acceleration?
A reaction mixture in a 10.00 liter flask contains5.0 moles each of hydrogen and fluorine gases plus 1.6 moles of HF.What will be the concentration of hydrogen when this mixture reaches equilibrium?
A standing wave that corresponds to the fourth harmonic is set up on a string that is fixed at both ends. If the frequency of this standing wave is 440 HZ what is the frequency of the lowest-frequen
Now it is found that the objects repel one another with a force whose magnitude is equal to that of the initial attractive force. What is the initial charge on each object? (Note: there are two poss
An aqueous solution is prepared by diluting 3.30 mL acetone,CH3COCH3, (d=0.789 g/ mL) with water to final volume of 75.0 mL. The density of the solutionis 0.993 g/mL.