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A positively charged He+ atom has two protons in the nucleus and one electron in the shell. In a classic model of the atom, in a certain state, this electron is in a circular orbit around the nucleus with an angular momentum of 3.655×10-34Js. What is the radius of the orbit?
A particular banana contains 385 mg of potassium, of which a small fraction is the radioactive isotope _19^40 text (K) (see Appendix B). Approximation the activity of this banana because of _19^40 text (K).
Spheres A and B are touched together and then separated. Sphere C is then touched to sphere A and separated from it. Lastly, sphere C is touched to sphere B and separated from it. Explain how much charge ends up on sphere C?
What is the acceleration of the truck. If it starts 4.50 m from the lower edge of the roof, how fast would the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 18.0 N.
A group of hikers hear an echo 2.50 s after they shout. If the temperature is 28°C, how far away is the mountain that reflected the sound wave.
For a real train the friction between the car and the track can be described by a friction coefficient, μ. Find out this coefficient assuming that the time it takes for the car to come to rest is 3 s.
A coil with resistance 0.05( and self-inductance 0.01H is connected across a 12-volt battery of negligible internal resistance. a) How long after the switch is closed will the current reach 95% of its final value.
A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east, How far from the dock does the boat reach the child
A 10-kg bullet is fired horizontally into a 300-g wooden block initially at res on a horizontal surface and become embedded in it. The coefficient of friction between block and surface is (0.50).
The aurora is caused when electrons and protons, moving in earth's magnetic field of 5x10^-5 T, collide with molecules of the atmosphere and cause them to glow. What is the radius of the circular orbit for (a) an electron with speed 1.0×10^6 and (b) ..
A string is attached to a rigid support and the cylinder allowed to drop from rest. Find out the acceleration of the cylinder.
How to discuss the results in relation to the objectives of the experiment of CENTRIPETAL FORCE? Next, how am i supposed to elaborate the results that I obtained if my results are confirmed the centripetal force theory.
A parallel-plate capacitor has plates of area A and separation d and is charged to a potential difference, find The inital and final stored energy
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