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A terrorist opens a vial of viruses in the center of a 10 x 10 m classroom, allowing them to become airborne. If the viruses have a mass of 2.5 *10^-22 g and the temperature of the room is 25 degrees C, how far will they have diffused from their starting point in 50 min? Let the mean free path be 10^-5 cm.
Starting from the top and at rest a block slides down an inclined plane and has a velocity of 1.45 m/s at the bottom. Find the potential energy of the block at the top of the incline
A bullet of mass m=30 g or .03 kg, is fired into a wooden block of mass M=5.0 kg. The block is attached to a string of length 1.5 m. The bullet is embedded in the block, causing the block to then swing.
A billiard ball of mass 163 g and radius 3.0 cm starts with a translational speed of 2 m/s at point A on the track as shown in the figure below. If point B is at the top of a hill that has a radius of curvature of 79 cm, what is the normal force a..
An electron traveling at 3.00 x 104 m/s is further accelerated to an excited state by a potential difference so as to reduce its de Broglie wavelength to one-third of its original value. How much voltage is required to accomplish this? The electro..
part a a power plant burns coal and generates an average of 620.0 megawatts mw of electrical power while discharging
A Rope is wrapped around a cylinder with a diameter of 500 cm. When the rope is pulled, it causes the cylinder to rotate around an axis through its center. If the cylinder starts from rest, and the tension in the rope is a constant 20.0 N, what wi..
A 65.0 kg diver is 3.50 m above the water, falling at speed of 6.40m/s. Calculate her kinetic energy as she hits the water. (Neglectair friction)
a uniform 2.8 magnetic field points to the right a 2.19 m long wire carrying 21.8 a is placed at an angle of 23
Supplies are being dropped from a Chinook helicopter at a military outpost. When the copter arrives over the landing area at an altitude of 1,040 m, it descends vertically at a constant speed 28 m/s and after 15 s drops the supply package. The copter..
This question has to do with the oil drop experiment and how much voltage must be applied to keep a drop suspended in air. how much voltage must be used to keep the oil drop suspended
What is the average electric field strength in this region?
Coherent light from a sodium-vapor lamp is passed through a filter that blocks everything except for light of a single wavelength. find the wavelength of the light that falls on the slits
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