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A block of mass M2 = 5.0kg on a rough inclined surface is connected to a ball of mass M1 by a cord over a pulley. The coefficient of static and kinetic friction between the block and the surface are ustatic = .25 and u kintec = .15. The angle between the incline and the horizontal is 30 degrees. What should the mass of M1 be to make M2 start to move?
In a photoelectric-effect experiment, the wavelength of light shining on an aluminum cathode is decreased from 249nm to 207nm. What is the change in the stopping potential
A 60-power refracting telescope has an eyepiece with a focal length of 5.5cm. How long is the telescope
How much does it cost in dollars to watch the 5.25 hour-long coverage of the Super Bowl on a 130 Watt television set? Assume that one kWh electricity costs 9.90 cents
A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. how fast is the student going at the bottom of the slide
A metal sphere A has charge Q. Two other spheres, B and C, are identical to A except they have zero net charge. A touches B, then the two spheres are separated
During a 65-ms interval, a change in the current in a primary coil occurs. This change leads to the appearance of a 4.3-mA current in a nearby secondary coil. What is the change in the primary current
A window washer with a mass of 79.0 kg stands a distance, D = 0.800 m, from the left end of a plank of length, L= 1.90 m, Find T2, the tension in the right cable
A mass weighing 16 pounds stretches a spring 8/3 feet. The mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically e..
In the strictest sense, what must be the definition of a point charge? What are the other possible charge distributions and Prove that newtons per coulomb are dimensionally the same as volts per meter.
a ball is thrown vertically upwards from a point of 1.5m above the ground with an initial velocity of 30 ms and g
A television is tuned to a station broadcasting at a frequency of 7.00×10^7Hz . For best reception, the rabbit-ear antenna used by the TV should be adjusted to have a tip-to-tip length equal to half a wavelength of the broadcast signal.Find the op..
A vial containing 99mTc (T1/2=6.02h) is labeled 75kBq/ml at8 AM, what volume should be withdrawn at 4 PM on thesame day to prepare an injection of 50kBq for a patient.
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