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(a) If an electron makes a transition from the n = 4 Bohr orbit to the n = 3 orbit, determine the wavelength of the photon created in the process.
nm
(b) Assuming that the atom was initially at rest, determine the recoil speed of the hydrogen atom when this photon is emitted.
ms
27 g of copper pellets are removed from a 300 C oven and immediately dropped into 120 mL of water at 21C in an insulated cup. What will the new water temperature be?
A horizontal mass-spring system has low friction, spring stiffness 250 N/m, and mass 0.370 kg. The system is released with an initial compression of the spring of 10.8 cm, What is the maximum speed during the motion
An electron in an oscilloscope is accelerated as a result of the potential difference between the cathode and anode. The electron has negligible initial speed and a final speed of 4.60 107 m/s. Find the voltage drop from cathode to anode.
Resistance are 10N per 1000 for the engine 5N per 1000kg for the trailer. So what's the forward thrust exerted by the engine?
Two charges, +q and -q, are located in the x-y plane at points (0,+d/2) and (0,-d/2), respectively. Calculate the magnitude of the electric field at point P with the superposition principle
You are driving to the grocery store at 24 m/s. You are 115 m from an intersection when the traffic light turns red. Suppose that your reaction time is 0.50 s and that your car brakes with constant acceleration. How far are you from the intersecti..
A car is driven east for a distance of 47 km, then north for 25 km, and then in a direction 29° east of north for 29 km. find (a) magnitude (in km) of car's total displacement from its starting point and (b) the angle (from east) of the car's total..
A 3.0kg mass initially traveling in the +x direction at 3.0m/s collides with a 2.0kg mass traveling in the -x direction at 3.0m/s. find The coefficient of restitution between the two masses
Now, as both pipes vibrate at their fundamental frequencies, the beat frequency of 17 Hz is heard. How many centimeters were cut off the end of the second pipe? The speed of sound is 333 m/s.
Two positive point charges, each of which has a charge of 4.3E-9 are located at y=+.10m and y+-.10m, What is the direction of this force
A person drops a cylindrical steel bar (Y = 6.0 × 1010 Pa) from a height of 2.00 m (distance between the floor and the bottom of the vertically oriented bar). The bar, of length L = 0.58 m, radius R = 0.50 cm, what is the maximum compression of the..
What range is appropriate
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