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A lead block is suspended from the underside of a 0.5 kg block of wood of density of 668 kg/m3. If the upper surface of the wood is just level with the water, what is the mass of the lead block?(The density of lead is 11340 kg/m3)
A pendulum has a time period of 5 sec at a particular place. calculate the acceleeration due to gravity at this place
The equation of a transverse wave traveling along a very long string is y = 5.0 sin (0.055 ?x + 6.0 ?t), where x and y are expressed in centimeters and t is in seconds. Determine the amplitude of propagation of the wave.
A solenoid with a cross-sectional area of 1.77 x 10-3 m2 is 0.716 m long and has 465 turns per meter. Find the induced emf in this solenoid if the current in it is increased from 0 to 2.00 A in 45.9 ms
A circuit containing a battery with V = 10.2 V and a resistor R1 = 16.6 ? is shown above. If we replace the wire between points a and b with a second resistor R2 = 26.3 ?, by how much (in A) will the total current through the battery change?
A copper wire of radius a = 0.214 mm has an aluminum jacket of outer radius b = 0.310 mm. There is a current i = 2.89 A in the composite wire. what is the length in meters of the composite wire
A Carnot engine performs work at the rate of 480 kW while using 760 kcal of heat per second. If the temperature of the heat source is 571°C, at what temperature (in Celsius) is the waste heat exhausted
The output voltage of a power supply is V=Vnode sin (120t) volts. At t = 0.010s the output voltage is 4.2 V. What is the rms voltage of the generator
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..
An air conditioner operating between 88°F and 73°F is rated at 4100 Btu/h cooling capacity. What horsepower is required of the air conditioner motor
Suppose biological cell membrane has a specific capacitance of ~1μF/cm^2. Calculate the capacitance of a typical cell with diameter of ~10 μm. Suppose the membrane potential is -60mV, calculate the amount of net charge kept inside the cell. Calcul..
An electron is confined in a one-dimensional box. Two adjacent allowed energies of the electron are 2.8x10^-19 J and 3.5x10^-19 J. What is the length of the box
A loop of wire carrying a current of 2.0 A is in the shape of aright triangle with two equal sides, each 15 cm long. A 0.7 T uniform magnetic field is in the plane of the triangle and is perpendicular to the hypotenuse. discover the magnetic force on..
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