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A hand-cranked AC generator is used to cause 0.65 A of current (rms), What is the minimum average rate at which work must be done on the generator
If i want to make 400.00 mL of a 0.325 M KNO3 solution, and I have a 0.840 M stock solution on hand, how much of the stock solution will I need to dilute
The average speed of the atoms in a 1.6 g sample of helium gas is 651 m/s. Estimate the thermal energy of the sample
Two identical rods each of length L and charge Q are perpendicular to each other and separated by a distance D, Find the force between them
A zero-order reaction has a constant rate of 2.40×10?4 M/s. If after 45.0 seconds the concentration has dropped to 2.00×10?2 M , what was the initial concentration
Two loudspeakers in a 20°C room emit 629 Hz sound waves along the x-axis, If the speakers are out of phase, what is the smallest distance between the speakers for which the interference of the so
If 0.10g of benzene (C6H6) is ignited in a 0.3 L vesses at 298K and surrounded by 25atm of oxygen: a) write the net reaction; b) how many moles of O2 were consumed? c) how many moles of product were
A hollow sphere of inner radius 7.1 cm and outer radius 9.7 cm floats half submerged in a liquid of density 510 kg/m3. Calculate the density of the material of which the sphere is made
The semiconducting compound InAs is widely used for infrared light emitting diodes (LED's). What is the frequency of light emitted by a InAs LED
When a thin slab of semiconducting material is illuminated with monochromatic electromagnetic radiation, Determine the energy gap of the semiconductor
If n=10, what is the largest value of the angular momentum l in this shell, How many electrons can be placed in this shell
An aircraft?starts at rest and is accelerated?at 13.2?m/s2 for 8.5 seconds, at which time the aircraft launches. What is the distance traveled from the starting point
An excited H atom the e- is in 4d. The atom is in an external magnetic field. What are the smallest and largest possible angles
What is the apparent weight of a cube of iron of volume 0.2 m3 when it is submerged in water? The density of iron is 7800 kg/m3
A copper rod 25 cm long having a cross-sectional area of 7.5 cm2 is used to connect a boiler maintained at 100 oC to a large block of ice at 0 oC. What is the rate of change in entropy of the ice
A woman stands at the edge of a carousel that is rotating without friction at 0.80 rad/s. The carousel has a radius of 2.0m and a moment of inertia of 600 kg m2. What is now the angular speed of the
A steel guitar string 50 cm long has a mass density of 1.5 g/m and the tension is 500 N. Find the frequency of the second harmonic
A small plastic ball with a mass of 6.50 x 10?3 kg and a charge of +0.15uC is suspended from an insulating thread, What is the magnitude of the charge on each plate
A particle of charge 12uC and mass 3.8x10^-5kg is released from rest inside a parallel plate capacitor from the positive plate. How long does it take the particle to reach the negative plate
A string is wrapped around a wheel of radius 0.4 m and moment of inertia 25 kg-m2. If the string is pulled with a force of 60 N, what is the angular acceleration of the wheel
An exhaust tube from a steam generator is submerged in a large container of cool water. what is the change of entropy (in J/deg) of the steam
When a certain photoelectric material is illuminated with red light (?=715) and then blue light (?=400), calculate the work function of the material
Suppose there was a process by which two photons, each with momentum 0.60MeV/c ,could collide and make a single particle. find the maximum mass that the particle could possess
An air-track glider attached to a spring oscillates with a period of 1.50s . At t=0s the glider is 4.50cm left of the equilibrium position, obtain the phase constant
A 0.700kg block is attached to a spring with spring constant 14.5N/m . While the block is sitting at rest, find The amplitude of the subsequent oscillations