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Ice (intial at 0 degree C) is added to 0.69 L of tea at 16 degree C to make coldest possible iced tea. If enough ice is added so the final mixture is all liquid, how much liquid is in the pitcher wh
The half-life of iodine 131is 8.021 days. If a person has a 1.000g of iodine131today, in how many days the remaining amount of the iodine131 will be 0.006250g?
Assume that all the power delivered to the wires is used immediately to melt the ice. Find the cross-sectional area of each wire.
A cylindrical copper cable carries a current of 1200 A. There is a potential difference of 1.6*10^-2 V between two points on the cable that are 0.24 m apart. What is the radius of the cable?
An insulated beaker with negligible mass contains liquid water with a mass of 0.205kg and a temerature of 67.1 degree C. How much ice at a temperature of -14 degrre C must be drop into the water so
Your 2.25kg physics book rest on a horizontal tabletop. a) find the normal force on the book b) suppose you pull up on the book with a 15.0 N force. Now what's the normal force?
Suppose you apply the brakes and do not turn the steering wheel. Find the minimum distance you must be from the wall to avoid a collision
A 1.5 kg mass is shot straight up with an initial speed of 3 m/s. What is the kinetic energy of the mass when it is launched, how much work does the gravitational force do on the mass during its acc
If the gravitational potential energy U of the earth-rock system is 0 at the bottom of the will, what is the value of U just before the slide, how much energy is transferred to the thermal energy du
A 390-m-wide river has a uniform flow speed of 2.0 m/s through a jungle and toward the east. An explorer wishes to leave a small clearing on the south bank and cross the river in a powerboat that mo
After flying for 13 min in a wind blowing 44 km/h at an angle of 18° south of east, an airplane pilot is over a town that is 52 km due north of the starting point. What is the speed of the airpl
Calculate the average rate of decomposition reaction if theconcentration of NOCl2 is 0.0364 M at t = 0.245 minutes and 0.0107M at t = 3.432 minutes. Express the answer in M/s. [Hint: convertthe time
The rms voltage across a 0.020 μF capacitor is 2.0 V at a frequency of 56 Hz. A) What is the rms current through the capacitor? Answer in μA.
An acid with a pKa of 8.0 is present in a solution with a pH of 6.0. What is the ratio of the protonated to the deprotonated form of the acid?
To make a solution with a pH of 4.50 a student used the following procedure:A certain amount of sodium acetate along with 0.300 moles of acetic acid is added to enough water to make a solution of1.0
Calculate the mass of HONH2 required to dissolve in enough water to make 250 ml of solution having a pH of 10.00 (Kb= 1.1 x 10^-8)
You are designing a small coil (called a search coil) to measure magnetic fields. It is to have a diameter of 3.60 cm and is to be designed so that flipping it 180 degrees in a field of 9.00×1
An inductor has inductance of 0.260 H and carries a current that is decreasing at a uniform rate of19.0 mA/ s. Find the self-induced emf in this inductor.
How long after the switch is closed will it take for the energy stored in the inductor to reach half of its maximum value?
A quantity of ore consist of 90% (by weight) chalcopyrite mineral with a composition of CuFeS2. The rest is inert quartz,SiO2. The ore is roasted by heating it in oxygen at800oC.
What emf is induced in this loop? If the loop has a resistance of 0.650 ohm, find the current induced in the loop.
Calculate the pressure of 11.4 g of sulfur dioxide in a 24.0 mL vessel at 25.0 degrees Celsius using a) the ideal gas law and b) the van der Waals equation using Waals' constants ( a = 6.714; b = 0
A 0.35 kg particle moves in an xy plane according to x(t) = - 12 + 4 t - 6 t3 and y(t) = 20 + 9 t - 11 t2, with x and y in meters and t in seconds. At t = 0.9 s, what are (a) the magnitude and (b) t
Water has a density that is 13.6 times less than that of mercury. If an undersea vessel descends to 1.5 km, how much pressure does water exert in atm?
A car of mass M brakes for 40m along a level road before stopping. The coefficient friction between the tires and the road is 0.7. What was the car's initial speed when it started to brake? i) Draw