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A clock face has negative point charges -q,-2q,-3q, · · · ,-12q fixed at the positions of the corresponding numbers. The clock hands do not perturb the net field due to the point charges. At what time does the hour hand point in the similar direction as the electric field vector at the center of the dial?(Hint: utilize symmetry. Answer using the format hh:mm)
a horizontal circular platform rotates counterclockwise about its axis at the rate of 0.805 rad/s. You, with a mass of 67.3 kg, Calculate the total angular momentum of the system
An automobile tire has a radius of 0.380 m, and its center moves forward with a linear speed of v = 18.0 m/s. Decide the angular speed of the wheel.(Assume that there is no slipping of the surfaces in contact during the rolling motion.)
The systolic pressure is 0.158 atm and the diadtolic pressure is 0.150 atm in the heart. If the volume pumped in one heartbeat is 75cm3 calculate the work done in a heartbeat. Assume a simple dependence of pressure in a ventricle.
A capacitor initially with a voltage of 10v is connected to a voltmeter of internal resistance of 2 Mega Ohms . After a time of 4 sec the voltmeter reads 5.0 volts.
A long string of tension T and mass density η is attached to a small sphere of mass m. What is the displacement of the string on the right side of the mass
A tank of volume 0.5 m^3 contains oxygen at a measure of 1.5 x 10^6 Pa and a temperature at 20 degrees C. How many kilomoles of oxygen are in the tank
A 3 x 10^2 kg piano is being lifted at a steady speed from groundlevel straight up to an apartment 10.0 m above the ground. Thecrane that is doing the lifting produces a steady power of 4.00 x10^2 W. How much time does it take to lift the piano?
A typical adult ear has a surface area of 1.45 × 10-3 m2. The sound intensity during a normal conversation is about 2.49 × 10-6 W/m2 at the listener's ear. How much power is intercepted by the ear
A hydrometer is used to measure the specific gravity of liquids. For a sure liquid a hydrometer reading indicates a specific gravity of 1.15. What is the liquid's density and specific weight? State the answer in SI units.
he-ne lasers are often used in physics demonstrations. they produce light of wavelength 633 nm and a power of 0.700 mw
a small aircraft is headed due south with a speed of 57.8 m/s with respect to still air. Determine the directional angle is relative to due south
A nebula?a region of the galaxy where new stars areforming?contains a very tenuous gas with 128 atoms/cm3. What is the gas pressure
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