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In a hydrogen atom, the electron jumps from n=1 level to the n=4 level. What is the wavelength of the emitted or absorbed photon?
an engineer sets out from home to attend a meeting. for the first 90 minutes she drives east at 30 kmh then slows down
After flying for 15 minute in a wind blowing 42 km/h at an angle of 22 degree south of east, Find the speed of the airplane relative to the air
Another laser amplifier gives an output of 5I0 when it receives input intensity I0 tuned to w0, the centre frequency of the laser transition. When the input radiation istuned to nearby angular frequency w1
Prove that the group speed of the wave is the same as the speed pf the particle.
How can the disk rotate to the have smallest possible moment of inertia I? How can the disk rotate to the have largest possible moment of inertia I?
A 10-kg projectile launched over level ground has three times the kinetic energy at the moment of its launch as it does at its peak height. Find its impact velocity
Ideal incompressible water flows through a horizontal pipe of cross-sectional area 10.0 cm^2 at a pressure of 0.250 atm with a volume flow rate of 1.00 x 10^-3 m^3/s. What is the pressure at the valve
A block with mass 0.5 kilogram is covering a hole in a horizontal table. From below the table a bullet with mass 5 g is fired straight up. Find the speed with which the bullet hit the block
A 12.3 kilogram test rocket is fired vertically from Cape Canaveral. Calculate what additional height will the rocket rise
On an air track, a 400 g glider moving to the right at 2.00 m/s collides elastically with a 500 g glider moving in the opposite direction at 3.00 m/s, Find the velocity of second glider after the collision
An object is viewed through a 35 cm thick tank of water (n=1.33) at an angle of 30 degrees from parallel to the tank surface. what is the apparent displacement the object from its actual location
Wind turbines designed for offshore installations are much larger than ones designed for use on land. At what rate should the blades of the offshore turbine rotate
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