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A certain string on a piano is tuned to produce middle C (f1= 261.63 Hz) by carefully adjusting the tension in the string. What is the frequency of the same string if the tension is doubled?
Let us use the uncertainty principle to (very roughly) estimate the size of a hydro- gen atom. Picture the hydrogen atom as an electron orbiting a proton at close to the speed of light.
Two bars of identical mass are at 30 °C. One is made from glass and the other from another substance. The specific heat capacity of glass is 840 J / (kg • C°).
An object has a kinetic energy of 313 J and the momentum of magnitude 24.1 kg·m/s. Find out the speed and the mass of the object.
A u-tube manometer is used to measure the pressure of a vessel under vacuum. Assume the manometer is open to atmospheric pressure (101.325 kPa) and the density of the fluid in the manometer is 12.0 g/cm3. When the vessel is under 11.5 psi of vacuu..
A small but measurable current of 8.4 x 10-10 A exists in a copper wire whose diameter is 2.9 mm. calculate the current density and electron drift speed
Two large metal plates of area 0.5 m2 face each other. They are 4.8 cm apart and have equal but opposite charges on their inner surfaces. what is the magnitude of the charge on each plate
Two small plastic spheres are given positive electrical charges. When they are 17.0{\rm cm} apart, the repulsive force between them has magnitude 0.200{\rm N} . 1.What is the charge on each sphere if the two charges are equal? 2.What is the charge..
A charge of −1 Coulomb is placed at the 100-cm mark of the same meter stick. Elucidate is it possible to place a proton somewhere on the meter stick so that the net force on it due to the two charges is 0?
Find the change in momentum of a 1140kg car that increases its speed from 4.5 m/s to 18.0 m/s in a time of 19s while travelin in the same direction
A parallel-plate capacitor has a plate area of 1cm^1 and a plate separation of 2.5 mm. To obtain an electric field of 1.0*10^6N/m between the plates, the magnitude of the charge on each plate should be.
In the figure below, the converging lens' focal length is 13 cm, d = 18 cm, and the diverging lens' focal length is -12.6 cm, How tall is the image formed by the diverging lens
Use Gauss's Law and Ampere's Law to find both the capacitance per unit length and the inductance per unit length of a coaxial cable with an outer radius of 4.5mm and an inner radius of 1.5mm
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