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A 2.1mm -diameter glass bead is positively charged. The potential difference between a point 2.5mm from the bead and a point 4.5 mm from the bead is 500 V. What is the charge on the bead?
The Earth's rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2006 the Earth took about 0.840 s longer to complete 365 revolutions than it did in the year 1906. What was the average angular acceleration o..
two identical guitar strings are prepared such that they have the same length 2.30 m and are under the same amount of
A 1070-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam.
a proton and an electron are moving due east in a constant electric field that also points due east. the electric field
Light of wavelength 470 nm in air enters a fishbowl filled with water, then exits by the crown-glass wall of the container. Find the wavelengths of the light (a) in the water and (b) in the glass.
A planet of mass m = 7.05 × 1024 kg is orbiting in a circular path a star of mass M = 4.95 × 1029 kg. The radius of the orbit is R = 8.35 × 107 km
Is kinetic energy of a system conserved when two objects collide and stick together? What about the momentum of the system? What kind of collision is this (elastic or inelastic )?
A generator consists of 23 loops, each with an area of 0.010m^2 located inside a uniform magnetic field of 2.0T. What is the rms voltage
The Calorie (or kcal) is another energy unit and is commonly used to measure food energy (as well as heat). How many Calories would you burn walking up a flight of stairs for an hour
A typical AAA battery has stored energy of about 3400 J. (Battery capacity is typically listed as 625 mA h, Assuming that the potential difference across the capacitor is 1.5 V, what must the area of each plate be
Water is moving with a speed of 5.4 m/s through a pipe with a cross-sectional area of 4.8 cm2. What is the speed at the lower level
The entrance to a large lecture room consists of two side-by-side doors, one hinged on the left and the other hinged on the right. What is the diffraction angle of the sound under each of the following situations
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