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While attempting to tune the note C at 532 Hz, a piano tuner hears 5 beats/s between a reference oscillator and the string. (a) What are the possible frequencies of the string?
Automobile engine slows down from 4500rpm to 1200rpm in 2.5 s. Calculate (a) its angular acceleration, assumed constant, and (b) the total number of revolutions the engine makes in this time.
What are the components of vector in the xy plane if its direction is 252 counterclockwise from positive x axis and its magnitude is 7.34 units?
The charge was always found to be a small multiple of 1.6e-19 C. Find the charge on an oil drop weighing 1.84 10-14 N and suspended in a downward field of magnitude 2.88 104 N/C.
During the acceleration, the hoisting cable applies a force of 9300 N. What does the scale read during the acceleration?
2.00 ml of a 0.75 m solution of potassium permangante k2mnO4 solution is used to make a 500.00 ml solution. What is the concentration go the new solution.
A particle with a charge of 4.22 10-6C is placed between two parallel plates and feels a force of 1.61 10-4N. What is the strength of the field between the two plates?
For this wave determine (a) the wavelength (b) the frequency (c) velocity (magnitude and direction) (d) amplitude and (e) maximum and minimum speeds of particles of the cord.
A 1.80 102 kg crate is being pushed across a horizontal floor by a force vector P that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.350. What should be
Lakes that have been acidified by acid rain can be neutralized by the addition of limestone How much limestone in kilograms would be required to completely neutralize a lake containing of H2 per lit
A car travels east at 91 km/h for 0.7 h. It then travels 30.0° east of north at 107 km/h for 0.6 h. What is the average velocity for the trip?
A 0.35 kg point mass moving on a frictionless horizontal surface is attached to a rubber band whose other end is fixed at point P. The rubber band exerts a force F = bx toward P, where x is the leng
Using a value of 343 m/s for the speed of sound, determine the maximum distance between the television viewer and the celebrity.
if a gas held at constant pressure had an initial volume of 5.00 L and the temperature changed from 35 degrees C to 578 K what would be the final volume of this gas.
The police officer, knowing that the coefficient of kinetic friction between the tires and the road is 0.4, calculates the speed of the Toyota at impact. What was that speed?"
A solution of potassium hydroxide of unknown concentration is used to titrate 15.0 mL of a 2.5 M sulfuric acid solution. The volume of the base needed is 27.2 mL. What is the molarity of the base?
a sample of helium gas is at 122 kpa and 22 C. assuming constant volume, what will the temperature be when the pressure is 203 kpa .
A 5 Kg block is on a 9 Kg triangular wedge. All surfaces are frictionless and both object start from rest. The block starts at the top of the wedge at 1.2 m. Find the final speeds of a block and the
Why does the magnetic field need to be changing? Why can't a very strong but constant magnetic field charge the capacitor?
The pH of a solution made by dissolving 1.0 mole of propanoic acid and 1.0 mol of sodium propanoate in 1.0 L water is 4.85.
A hot air balloon has a mass of 3400kg and two 75kg passengers. It is currrently decending at 4m/s. Draw a free body diagram for the hot air balloon. When the burner is turned on what force is requi
The first-order bright fringe is a distance of 4.84 from the center of the central bright fringe. For what wavelength of light will the first-order dark fringe be observed at this same point on the
While a person is walking, his arms (with typical lengths 70cm measured from the shoulder joint) swing through approximately a 45deg angle in 0.5sec. As a reasonable approximation, we can assume tha
Determine the molar mass of an unknown gas that has a volume of 72.5 mL at a temperature of 68°C, a pressure of 0.980 atm, and a mass of 0.207 g.
What is the speed of a wave in a particular medium that has a frequency of 445 MHz and a wavelength of 67 cm?