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What must the potential difference between the plates be to hold the droplet in equilibrium?
7.51 kilojoules of heat is added to a 22.8 g piece of copper, intially at 51 degrees celsius. What will be the final temperature of the copper (in degrees celsius)? (specific heat of copper = 0.385
Two forces , each 2200 N , act on an automobile as follows: t2 is directed 40 degres above the road. What is the the total force ( magnitude and direction ) acting on an automobile.
The magnetic flux through one loop of wire is reduced from 0.39 to 0.19 in 0.30 . The average induced current in the coil is 13 . Can you determine the area of the loop from the data given?
What is the major aldol product from the reaction of excess 2,2-dimethylpropanal with etanal? What are the possible aldol product(s) from the reaction of ethanal and methanal?
Four point charges have the same magnitude of 1.9 x 10-12 C and are fixed to the corners of a square that is 6.4 cm on a side. Three of the charges are positive and one is negative. Determine the m
A diffferential equation in the form of M(x,y) dx + N(x,y) dy = 0 is called exact if dM/dy = dN/dx. Determine if the differential equation (2x(y^3) +2) dx + (3x^2 y^2 + e^y) dy = 0 is exact.
Fats and oils are also converted commercially into long-chain alcohols. What is the best and most direct reaction by which to accomplish this?
A function f(x,y) is harmonic if fxx + fyy = 0. Determine if the function g(x,y) = e^(-x) cos(y) + e^(y) cos(x) is harmonic.
In a semiclassical model of the hydrogen atom, the electron orbits the proton at a distance of 0.053 nm. a. What is the electric potential of the proton at the position of the electron? b. What is the
The heat of vaporization of water is 40.7 kJ/mol. How many kilojoules of heat must be provided to convert 12.00 g of liquid water at 100°C into 12.00 g of steam at 100°C?
Give the distance of the spot to the positive charge in meters (m). (Hint: The spot does not necessarily lie between the two charges.) (b) What would be the force on a charge of +14 C placed at this
Why is soap not suitable for laundry use with hard water,whereas, the synthetic detergent is? What is the chemicaql composition of peanut oil?
Each glass of 2% milk contains 9 g of protein, 13 g of carbohydrates, and 300 mg of calcium. How many servings of each food should the dietician provide for the patient?
The concentration of a chemical degrades in water according tofirst-order kinetics. The degradation constant is 0.2/day. If theinitial concentration is 100 mg/L, how many days are required for the
The width of a slit is 2.00 x 10-5 m. Light with a wavelength of 485 nm passes through this slit and falls on a screen that is located 0.55 m away. In the diffraction pattern, find the width of the
A current of 250 A flows for 24 hours at an anode where [Mn]2+ (aq)is being converted to MnO2 (s). What mass of MnO2 is deposited at this anode?
You can afford to put $1,500 per quarter into the fund, and you will work for 40 years before retiring. After you retire, you will be paid a quarterly pension based on a 25-year payout. How much wil
The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year-1. What fraction of the tritiuminitially in a sample is still present 30 years later?
What is the pressure at the bottom of the container? Assume 1000 kg/m3 and 901 kg/m3 for the density of water and the oil, respectively.
For how long (to the nearest year) should you lease the car so that your monthly payments are lower than if you were purchasing it with an 7%-per-year loan? You should lease the car for how many yea
What is the "exact" alkalinity of water ( in mg/L asCaCO3 ) that contains 0.6580 mg/L of bicarbonate, as theion, at a pH of 5.66?
If the masses are moved 5 times as far apart, what is their new mutual force of gravitational attraction?
Why is the separation of mixtures into pure or relatively pure substances so important when performing a chemical analysis?
If you are being charged 15% interest per year, how long (to the nearest 0.5 years) will it take you to repay your debt?