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A 240 g piece of ice at 0°C is placed in 510 g of water at 23°C. The system is in a container of negligible heat capacity and is insulated from its surroundings. (a) What is the final equili
During his many appearances at the Tour de France, champion bicyclist Lance Armstrong typically expended an average power of 400 W, 5.0 hours a day for 20 days. What quantity of water, initially at
A hotel elevator ascends 200 m with a maximum speed of 5.2 m/s. Its acceleration and deceleration both have a magnitude of 1.0 m/s2. (a) How far does the elevator move while accelerating to full spe
Two containers are at the same temperature. The first contains gas with pressure p1, molecular mass m1, and root-mean-square speed vrms1. The second contains gas with pressure p2, molecular mass m2,
A model rocket is launched straight upward with an initial speed of 50.7 m/s. It accelerates with a constant upward acceleration of 2.10 m/s2 until its engines stop at an altitude of 133 m. What is t
A rock is dropped from rest from a height h above the ground. It falls & hits the ground with a speed of 11m/s. From what height should the rock be dropped so that its speed on hitting the groun
A +6.1 µC charge is placed at the origin and a -3.8 µC charge is placed at x = 25 cm. At what coordinates can a third charge be placed so that it experiences no net force?
Two unknown charges attract each other with a force of 4.0 N when they are 4.1 m apart. Find the force (in N) between them when their separation is increased to 6.0 m apart.
A football is kicked straight up into the air; it hits the ground 5.4s later. What was the greatest height reached by the ball? Assume it is kicked from ground level.
What is the Coulomb force on the charge at the origin due to the presence of the other two charges?
Suppose a van de Graaff generator builds a negative static charge, and a grounded conductor is placed near enough to it so that a 11μC of negative charge arcs to the conductor. Estimate the numbe
Two positive point charges Q1 = 16 micro Coulombs and Q2 = 4 micro Coulombs are seperated in a line by a distance of 3 meters. Find the spot on the line bewteen the charges where the electric field
Calculate the electric field a distance z from a uniformly charged infinite flat non-conducting sheet by modeling the sheet as a continuum of infinite circular rings of charge. (Use the following as
A water heater is operated by solar power. if the solar collector has an area of 6.00m2, and the intensity delivered by sunlight is 550W/m2, how long does it take to increase the temperature of 1.00m3
A bat flies toward a wall, emitting a steady sound with a frequency of 20.0 kHz. This bat hears its own sound plus the sound reflected by the wall. How fast should the bat fly, v, to hear a beat fre
A column of oil 8.00 m tall having density Density = 6,400 kg/m^3 is capped at the top. Air is introduced into a small space just above the water and brought to a pressure of 4.0x10^5 Pa. What is th
Suppose the gas in a hot air balloon has density 0.800 kg/m^3. What volume must the balloon exceed in order to lift a basket and payload of mass 350 kg? Assume the balloon material has a total mass
A pipe has a pressure of 2.00 X 10^5 Pa at point A, where the cross-sectional area is 0.100 m^2. The speed of the water in the pipe is 5.00 m/s at that point. At point B, 6.00 m higher, the pipe cr
a) Two identical point charges of q = +1.50 x 10-8 C are separated by a distance of 1.10 m. What is the minimum amount of work required by an external force to move them closer together so that they
A cable of cross-sectional area of 4.00 cm^2 and 12.0 m long stretches by 2.00 mm when subjected to a load of 25,000 kg. What is Young's modulus for this material?
A pipe widens from having a radius of 1.00 cm to a radius of 4.00 cm. An end cap has a dozen holes in it. If the speed of the water in the pipe is 3.00 m/s, what is the speed of the water through th
In the operation of a hydraulic jack, suppose one has area 0.0200 m^2 and the other area 0.0500 cm^2. The two pistons are initially level. If a force of 250 N is exert on the input piston, what for
Give step-by-step directions of how the rod, without actually touching either sphere, can be used to give one of the spheres a negative charge.
A 7-Ohm resistor has a potential difference of 12 V across it. What current flows through the resistor?
A soccer player kicks the ball toward a goal that is 28.8 m in front of him. The ball leaves his foot at a speed of 18.7 m/s and an angle of 34.0° above the ground. Find the speed of the ball wh