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A large box with mass 45 kg is being pushed up a ramp at a 32o incline at a constant velocity by a man pushing parallel to the incline for 7.80 m, determine The force the man is pushing on the box
If a person on a 35.0 m diameter Ferris wheel feels 30% heavier at the bottom of the wheel, how fast is it going around
If the percentage standard error in measuring voltages and currents is 2%, what is the percentage standard error in finding
A laser pulse has an energy of 16 J and a beam radius of 2 mm. The pulse duration is 13 ns and the energy density is constant within the pulse. What is the total energy density within the pulse
An uncharged capacitor and a resistor are connected in series to a source of EMF. If E = 3.63 V, C = 19.6 uF, and R = 119 ohm, Calculate the maximum charge on the capacitor
A 5600 kg mass car is taking a turn at 72 m/s. If the frictional force here is 44,000N, what is the radius of curvature of the turn
In a serious accident, a nuclear power plant%u2019s reactor vessel cracks, and all of the cooling water drains out. how much energy will it take to melt the core
A man pushes a 50N box across a level floor at a constant speed of 2.0 m/s for 10 s. Find the average power output by the man
Acetic acid, CH3COOH, is a weak organic acid, pKa 4.47. Determine the position of the equilibrium for the reaction of acetic acid with CH3ONa. Draw the species that predominate at equilibrium. Skip
During a rain storm, rain comes straight down with a velocity Vi = -15 m/s, find the average force exerted by the rain on the roof during a 3 second time interval
One of Saturn's moons has an orbital distance of 1.87 x 108 m. estimate a mass for the planet Saturn
A student wishes to determine the coeffiecient of static between a block of material and a wooden board. determine the coefficient of kinetic friction
A 3.83 ohm resistor, a 7.53 ohm resistor, and a 9.02 ohm resistor are connected in series with a 15.0 V battery. What is the current in each resistor
1)At what velocity (m/s) must a 20.0 g object be moving in order to possess a kinetic energy of 1.00 J
Two point charges are separated by 10.0 cm and have charges of +2.00 uC, What is the electric field at a point midway between the two charges
Find the resistance in ohms of an aluminum wire that is 15 m long and has diameter 0.0025 m. What is the new resistance of the wire
An aqueous solution has a density of 0.80g/mL and is 51.0% C2H6O by mass. Determine the molar concentration of C2H6O.
Nichrome wire of cross-sectional radius 0.791 mm is to be used in winding a heating coil. find the length of wire you must use to wind the coil
Part A: Thymolphthalein is an indicator that changes color over a range from pH = 9.3 to pH = 10.5 . What is Ka of thymolphthalein. Part B: Alizarin yellow R, Ka=7.9x10^-12, is yellow in its protona
A beam of protons at an accelerator creates a current of 120 mu/A. how many protons strike the target in 30.0 s
The solubility constant of TlBr is Ksp = 3.6 × 10-6 and the solubility constant of AgBr is Ksp = 5.0 × 10-13. Determine the range of NaBr volumes over which each solid precipitates.
What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 80.0 mL of 0.529 M HCl and 46.0 mL of 1.150 M NaOH? pH = What is the pH (to nearest 0.01 pH unit) of a solution prepared by
assume that a proof plane is a conducting disc with a radius of 1.0 cm and is used to transfer some charge from the sphere described above. How much charge will be transferred in one scoop
Calculate the change in pH to 0.01 pH units caused by adding 10. mL of 2.72-M NaOH is added to 490. mL of each of the following solutions. a) water pH before mixing
An automobile starter motor has an equivalent resistance of 0.0470 and is supplied by a 12.0 V battery with a 0.0120 internal resistance. What is the current to the motor