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When two identical ions are separated by a distance of 8.3×10?10m , the electrostatic force each exerts on the other is 5.4×10?9N How many electrons are missing from each ion?
A kilogram of water (c = 4.186 kJ/kg °C) is stirred using a 400 watt device for 5 minutes. How much heat was lost to the surroundings
A 60 kg boy and a 40 kg girl both wearing skates face eachother at rest on a frictionless ice surface. what is the resulting speed and direction of the boy
Laser light is shown through a diffraction grating with a line density of 880 lines per mm. What is the wavelength of the laser
An electron moving with a velocity of 2.7 x10^6 m/s in the positive x direction enters a region, What is the magnitude of the electron's acceleration
a thin rod, of length L = 1.9m and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball is attached to the other end. find the initial height of the ball
A woman walks 290 m in the direction 37° east of north, then 177 m directly east. Find (a) the magnitude and (b) the angle (from due east) of her final displacement from the starting point. (c) Find the distance she walks.
An LC circuit with a 4.90 pF capacitor oscillates in such a manner as to radiate at a wavelength of 3.50 m. What inductance is in series with the capacitor
A wrecking ball (weight = 4600 N) is supported by a boom, which might be assumed to be uniform and has a weight of 3600N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and t..
A 16.5 kg gold bar at 27 °C is placed in a large, insulated 0.800 kg glass container at 15°C with 2.00 kg of water at 25.0°C. Compute the final equilibrium temperature.
A tennis ball of mass 5.61 10-2 kg, initially moving at a speed of 31.5 m/s, hits a wall and rebounds with a speed of 18.0 m/s. find the increase in the internal energy of the ball
What minimum force requires for door to hold it open
A kicker's extended leg is swung for 0.4 seconds in a counterclockwise direction while accelerating at 200 deg/s2. What is the angular velocity of the leg
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