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A 488 Hz sound wave travels through a substance. The wavelength of the sound wave is measured to be 2.9 meters. What is the speed of sound in the substance?
When he was first thinking about relativity (and before he developed his theory), find the your friend's speed relative to your reference frame
What is the wavelength of the emitted photon, when the electron in the hydrogen atom makes a transition from the ni = 4 state to the nf = 3 state
Two identical brass balls mounted on wooded posts initally have different amounts of charge, one +3uC and the other +15uC. What is the final charge in each ball
a real object is located at the zero end of a meter stick. a large concave mirror at the 100 cm end of the meter stick
when electrons move from the fourth energy level to the second energy level they emit visible light. explain why the
Initially 0.900 mol of an ideal gas in a container occupies a volume of 3.40 l at a pressure of 3.80 atm with an internal energy U1 = 410.4 J. Find the heat added during this process
A double slit experiment is performed with 589 nm light and slits-to-screen distance of 2.00 nm. The tenth interference minimum is observed 7.26 mm from the central maximum. Determine the spacing of the slits.
A large spool in an electrician's workshop has of 50 m of insulation coated wire coiled around it. What is the length of wire remaining on the spool
Two 1.50 V batteries -- with their positive terminals in the same direction -- are inserted in series into the barrel of aflashlight. One battery has an internal resistance of 0.240 Ω, the other an internal resistance of0.110 Ω. When the switch is..
For the superball in the previous question, if it was in contact with the table for 32 ms, calculate the average force exerted on the ball by the table
The critical angle for a special type of glass in air is 42.7o . The index of refraction for water is 1.33. What is the critical angle if the glass is immersed in water?
A train has a rest length of 100 m. Traveling at a very high velocity, it goes through a tunnel of length 60 m. What is the velocity of the train expressed in units of c
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