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Calculate the pH of a water at 25oC that contains 3.69 mg/L of carbonic acid. You may assume that the concentrations of carbonate and hydroxide are negligible and that there are no other ions presen
A regulation hockey puck of mass 675 g is sliding right at 1.66 m/s. What is the velocity (including magnitude and direction left/right) of the regulation hockey puck after the collision
The enthalpy of vaporization of water at 373 K and 1 bar is 40.7 kJ/mol and the molar heat capacities are 75.3 J/(mol K) for liquid and 33.6 J/(mol K) for gaseous water. Find the enthalpy of vaporiz
A runner approaching the start/finish line hears the bell signaling one lap to go. The bell emits a 352 Hz tone, How fast is she going
A plane is headed due west with an air speed of 224 m/s. Find the velocity of the plane relative to the earth
A 10.1-kg cannonball is fired from a 3,350 kg cannon with a velocity of 198 m/s. What is the speed of recoil of the cannon
The largest moon of Pluto, Charon, was discovered in 1979. Charon is in a circular orbit of radius 19,600 km around Pluto, What is the total mass of the Pluto-Charon system
A boy of mass 43.5 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.3 m/s. Find the final velocity of the skateboard
A mass m is attached to an ideal cord of length L (figure at left). What is the tension in the cord at that moment
Assume air in tank is mixed and that air is an ideal diatomic gas. For a heated tank what heat rate must be applied to keep the tank air temperature constant? For a perfectly insulated tank, what is
A bullet is shot straight up into the air. It takes 30.5 s for the bullet to go straight up and fall back straight down to its starting position. At what initial speed (in m/s) was the bullet shot i
A camera is equipped with a lens with a focal length of 23 cm. how far from the film should the lens be placed
A muon is created at the top of Mount Nanga Parbat (height 8,100 m) and travels at constant speed to sea level, what is the height of Mount Nanga Parbat
The driver of a 1250 kg car, initially traveling at 11.6 m/s, applies the brakes, bringing the car to rest in a distance of 23.0 m. Find the net work done on the car
Five seconds later, the police officer leaves on her motorcycle, starts her stopwatch, and accelerates at 2 m/s^2 toward the car. According to her stopwatch, how many seconds until she catches the c
The molar heat capacity of is described by the following equation over the range 300 < < 1700 : In this equation, is the absolute temperature in kelvin. The ratios ensure that has the correct
When this capacitor is discharged through the strobe lamp, it transfers all its energy in 1.0x10-4 s. Find the power delivered to the lamp
Classify each of the following as a compound, a homogeneous mixture, or a heterogeneous mixture. (a) wax (c) air (d) gasoline (e) iron(II) sulfide
Three 15-? resistors are connected in parallel. This arrangement is connected in series with a 10-? resistor. What is the effective resistance of the parallel portion of the circuit
Correct the second part of each of the following statements. (Type your answer using the format copper(II) chloride for CuCl2, and CO2 for CO2.) (a) SF6 is sulfur heptafluoride. (b) Phosphorous pent
a body of mass 0.1 kg is been rotated in a circular path of diameter 1 m on a frictionless horizontal plane bye means of a string. it performs 10 revolutions in 31.4 sec. calculate the centripetal f
Three liquids of different densities are mixed. Because they are not miscible (do not form a homogeneous solution with one other), they form discrete layers, one on top of the other.