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(a) Calculate the radius of the orbit for the innermost electron in lanthanum assuming it is relatively unaffected by the atom's other electrons.
(b) What is the ratio of this orbital radius to the 6.2 fm radius of the lanthanum nucleus?
A heavy crate is attached to the wall by a light rope, as shown in the figure. Another rope hangs off the opposite edge of the box. which rope will break
A long solenoid has 108 turns/cm and carries current. An electron moves within the solenoid in a circle of radius 2.03 cm perpendicular to the solenoid axis. The speed of the electron is 0.0359c (c = speed of light). Discover current i. Give the answ..
q1. you bring a 350-g wrench into the house from your car. the house is 15 c warmer than the car and it takes 2.52 kj
An ocean liner leaves New York City and travels 21° north of east for 134km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the directions.
0.25 kg coffee mug is made from a material that has a specific heat capacity of 990 J/(kg°C) and contains 0.31 kg of water. determine the minimum power rating of this heater
a glass lens nglass 1.52 has a 139 nm thick anti-reflective film nfilm 1.29 on one side. light moving through the air
The temperature of the glass surface of a 30 W light bulb is 75°C when the room temperature is 10°C. Estimate the temperature of a 150 W light bulb with a glass bulb the same size. Consider only radiation, and assume that 90% of energy is emitted as ..
An antifreeze solution is made by mixing ethylene glycol (? = 1116 kg/m3) with water. Suppose the specific gravity of such a solution is 1.06. determine the volume percentage of ethylene glycol in the solution
A girl with a mass of 47.1 kilogram running at a speed of 6.58 m/s jumps onto a stationary skateboard with a mass of 8.99 kilogram. Find what is their combined speed after the collision
A block of wood has a mass of 3.52 kg and a density of 606 kg/m 3 . It is to be loaded by lead so that it will float in water by 0.91 of its volume immersed. The density of lead is 1.13 multiplied by 10 4 kg/m 3 . What mass of lead is needed if the ..
The 1.0 kg block in the figure below is tied to the wall with a rope. It sits on top of the 2.0 kg block. What is the tension in the rope holding the 1.0 kg block to the wall
Two loudspeakers on a concert stage are vibrating in phase. A listener is 57.5 m from the left speaker and 28.5 m from the right one. The listener can respond to all frequencies from 20 to 20 000 Hz, and the speed of sound is 343 m/s. What are the tw..
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