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A violin string vibrates at 264 Hz when unfingered. At what frequency will it vibrate if it is fingered one fourth of the way down from the end
An elastic cord is 63.9 cm long when a weight of 71.1 N hangs from it but is 88.9 cm long when a weight of 184 N hangs from it. What is the "spring" constant k of this elastic cord
A irregular piece of metal has a dry mass of 5.7 kg. Once it is submerged it has an apparent mass of 2.4 kg. What is the density of the piece of metal
A Two balloons of identical volume (radius 11.5 m) are filled with gas. The first with helium, the second with hydrogen (H2) gas. What is the lift created by each one
the plane of a flat, circular loop of wire is vertical. An external B-field is directed perpendicular to the plane of the loop. What is the direction of the external magnetic field
A beam of gamma rays from a distant galaxy is observed through two polarizing filters whose transmission axis is at a 45 degree angle relative to each other here on earth
A large tank of water is full and has a depth of 10.0 m. What is the pressure at the bottom of the tank
A 245 kg person lays on board that is supported only on the ends and that has a mass of 12.0 kg. what is the force on either side where the board is supported
A pair of hedge trimmers are 45 cm long from the pivot to the end of the handles. how much force is applied to the branch
There are three masses m1 = 2.0 kg, m2 = 5.0 kg and m3 = 7.0 kg. The mass are all affixed to a massless rod of length 15cm. m1, Calculate the center of mass of the system
A street light is supported by two wires and each makes a different angle from each other. Find the tension in each wire if the street light has a mass of 60.0 kg
At an outdoor market, a bunch of bananas attached to the bottom of a vertical spring of force constant 16.0 N/m is set into oscillatory motion with an amplitude of 20.0 cm. What is the weight of the
In an RLC circuit, the resistance is 10. ohms, the capacitive reactance is 30. ohms, and the inductive reactance is 50. Ohms. What is the circuit impedance
a capacitor with a capacitive reactance of is connected in series with a 100 resistor across in ac source of frequency 60.0hz. what is the phase angle
In a mass spectrometer, a singly, negative charged ion having a particular velocity selected by using a magnetic field of .10 T perpendicular to an electric field of 1000 V/m. What is the mass of th
The second harmonic sinusoidal standing wave in a pipe with both ends open has a wavelength of 2m. The sound speed is 340 m/s. What is the frequency of the second harmonic
A car chases a coyote down a road ending in a sheer cliff. The car has a speed of 40 m/s and the coyote has a speed of 30 m/s. What beat frequencies do each the coyote and the driver hear
a sinusoidal transverse wave moves along a stretched string in the +j direction with amplitude 5 cm, wavelength 2 m, and wave speed 200 m/s. How much average power is transmitted along the string
Heat flows into an ideal gas at a constant volume. The pressure increases from 1.5 atm to 5.5 atm. What is the total heat flow of the process
An ideal gas expands at a constant total pressure of 2.5 atm from 3.45 L to 6.70 L. calculate the total work done by the gas in the process
The Yerkes telescope in southern Wisconsin is the largest refracting telescope in the world. What are the focal lengths of the two lenses
assume four objects each of mass m are placed at the corners of a square os side length, How much work is needed to separate the planets
A converging lens, which has a focal length equal to 8.2 cm, is separated by 32.5 cm from a second lens. Find the position of the final image using both a ray diagram and the thin-lens equation
Find the focal length of a glass lens that has an index of refraction equal to 1.66, a concave surface that has a radius of curvature of magnitude 108 cm
A 35 mm camera with interchangeable lenses is used to take a picture of a hawk that has a wing span of 1.8 m. What would be the ideal focal length of the lens used