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If a reactant is used up according to a first order rate equation, and the initial concentration of the reactatant is 3.2 mol/L, what is the concentration of the reactant after two half-lives have
A 237-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 47.1 ° below the horizontal. The coefficient of kinetic friction is 0.217. What should be the magnitu
Taking the mass of the atmosphere to be 5.3E15 metric tons, what mass of carbon must be burned in order to increase the average carbon dioxide level in the atmosphere by 190ppm by volume (inmetric t
Find the internal magnetic field experienced by the electron in a hydrogen atom.
Anthracene is a hydrocarbon obtained from coal (and as such its structure resembles a small fragment of graphite). The empirical formula of anthracene is C7H5. To find its molecular formula you diss
A tuning fork is placed next to a 15cm pipe creating the resonant standing wave seen below at two different times. The air inside is at room temperature. What is the frequency of the tuning fork?
A .15 g sample of a purified protein is dissolved in water to give 2 mL of solution. The osmotic pressure was found to be 18.6 torr at 25 degrees Celsius. Calculate the molecular weight of the prot
A fluorocarbon, CF4, has a critical temperature of-45.7oC, a critical pressure of 37atm, and a normal boiling pint of -128oC. Are there any conditions under which this compound can be a liquid at ro
The surrounding conductor has an inner diameter of 7.27 mm and a charge of -8.10 µC. Assume the region between the conductors is air. What is the potential difference between the two conductors
A 15cm flute has a standing wave as seen in several snapshots below. Time is measured in seconds and the speed of sound is 343 m/s. a) Identify the nodes and anti-nodes. b) Determine the harmonic nu
If three unequal capacitors, initially uncharged, are connected in series across a battery, which of the following statements is true? a) The largest voltage appears across the capacitor with the sm
A capacitor with very large capacitance is in series with another capacitor with very small capacitance. What is the equivalent capacitance of the combination?
Assuming that the distance between pairs of alpha particles is 3.0 x 10^-15 m, what is the electric energy (in eV) of this arrangement of alpha particles? Treat the alpha particles as pointlike part
At an instant when the distance between the two particles is 2m, the kinetic energy of the moving particle is 16J. Determine the distance separating the two particles when the moving particle is mom
During a test of a bulletproof vest, a handgun is fired at point blank range. the mass of the bullet is 2.12 g and it takes .341 s to travel through the gun barrell, during this time it has a consta
If the blood bag is suspended 0.70 above the needle, how long does the transfusion take? (Neglect the viscosity of the blood flowing in the plastic tube between the bag and the needle.)
A 9.0V battery supplies a 2.5mA current to a circuit for 5.0hr. a.) How much charge has been transferred from the negative tothe positive terminal?
Two identical swimmin pools are filled with uniform spheres of ice packed as closely as possible. The spheres in the first pool are the size of grains of sand; those in the second pool are the size
If the potential difference between the wire and the shell is 1.0x10^3 volts, what is the electric field at the surface of the wire? At the cylinder?
If a reactant is used up according to a first order rate equation, and the initial concentration of the reactant is 3.2 mol/L, what is the concentration of the reactant after two half-lives have pas
An ideal gas has the following initial conditions: Vi = 495 cm3, Pi = 6 atm, and Ti = 100°C. What is its final temperature if the pressure is reduced to 1 atm and the volume expands to 1000 cm3?
Earth's oceans have an average depth of 3800 m, a total area of 3.63E8 km^2, and an average concentration of dissolved gold of5.8E-9 g/L.
A passenger feels the seat of the car pushing upward on her with a force equal to 1.67 times her weight as she goes through the dip. If r = 26.3 m, how fast is the roller coaster traveling at the bo
Assume that an average household in Southern California uses 0.5acre-foot of water per year, and that the cost of a kWh ofelectricity is $0.19. Calculate the annual cost of pumping water to the aver
What is the minimum speed that the ball must have to make the field goal? assume appropriate aiming