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An ambulance siren is the source of sound emitted with a frequency of 1600 Hz. What is the frequency of the reflected sound wave heard at the ambulance
A 5 mC charge is located 1.8 m away from another charge. If the force between the charges is 5.0 N, what is the magnitude of the other charge
A mass vibrates at the end of a spring with simple harmonic motion. The spring constant is 30 N/m. What is the kinetic energy of the mass when it is at half its amplitude
The rear window of a car consists of thirteen thin wires (resistivity = 88.0 * 10^-8 ohms) embedded in the glass. Find the cross-sectional area of each wire
To save on heating cost, the owner of a greenhouse keeps 660kg of water around in barrels. find the minimum ampere rating of an electric heating system
A 20.0 kg wood ball hangs from a 1.70 m-long wire. The maximum tension the wire can withstand without breaking is 500 N. What is the largest speed this projectile can have without causing the cable to
Two identical small insulating balls are suspended by separate0.25m threads that are attached to a common point on the ceiling. determine the charge on each ball
I have a rectangular slab of aluminum that is in contact with a rectangular slab of copper and both slabs are 5.00 cm x 15.0 cm in area. how much energy would flow from one face to the other
If i have a hollow copper sphere that has an outer diameter of 20.00 cm that is floating so that everything is just submerged in a bucket of water
A member of an aircraft maintence crew wears protective earplugs that reduce the sound intensity by a factor of 350. What sound intensity level would the crew member experience
A spider hangs from a strand of silk whose radius is 4.0*10^-6m. Thedensity of the silk is 1300kg/m^3. determined the mass of the spider
A volumetric flask made of Pyrex is calibrated at 20.0 °C. It is filled to the 175-mL mark with 36.5 °C Mercury. After the flask is filled, What is the volume of the acetone when it cools to
A conducting spherical shell of radius Ri has a net charge Q on it. Using Gauss's law, find the electric field between the two shells
A nuclear-fueled electric power plant utilizes a so-called "boilingwater reactor". In this type of reactor, nuclear energy causes water under pressure to boil at 285 °C, by which the temperature
A 52-kg mountain climber, starting from rest climbs a vertical distance of 730m. At the top, she is again at rest. Find her efficiency as a heat engine
If you were to drink mercury (13.6g/cm^3) with a straw, what would be the maximum length of the straw
Flywheels are large, massive wheels used to store energy. They can be spun up slowly, How much energy is stored in the flywheel
A 250g , 49.0 cm diameter turntable rotates on frictionless bearings at 60.0 rpm. What is the turntable's rotation angular velocity when the block reaches the outer edge
A string 2.0m in length is fixed a both ends and tigthened until the wave speed is 78m/s. what is the frequency of the standing wave
Each plate of a parallel-plate capacitor is a square of side 3.17 cm and the plates are separated by 0.551 mm. Find the electric field strength inside the capacitor
An isotope of the element Thallium, Tl-206, undergoes beta decay with a half life of 3.1 minutes. what mass of the isotope will be left after 9.3 minutes have elapsed
the specific heat of aluminum is .215 calories per gram per degree celcius. calculate the amount of heath required to raise the temperature
In the Bohr model of hydrogen, the electron moves in a circular orbit around the nucleus. Determine the angular speed of the electron
A bug is on the edge of a rotating record player moving toward a light positioned along the edge of record player as well. Determine the accelerations acting on the bug
Two violin strings are tuned to the same frequency, 294 rm/hrz. What will be the beat frequency heard