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Two parallel slits are illuminated by light composed of two wavelengths, on of which is 645 nm. On a viewing screen, the light whose wavelength is known produces its third dark fringe at the same place where the light whose wavelength is unknown produces its fourth-order bright fringe. The fringes are counted relative to the central or zeroth-order bright fringe. What is the unknown wavelength?
A transformer has 100 turns in the primary with a voltage of 100V, and 200 turns in the secondary with a voltage os 200V. what will be the current in the secondary
Determine the tangetial and centripetal components of the netforce exerted on the car when its speed is 15 m/s. The car's massis 1100 kg
a 494-turn solenoid has a radius of 7.95 mm and an overall length of 12.4 cm.a what is its inductance?b if the solenoid
Estimate the rms electric field in the sunlight that hits Saturn, knowing that the Earth receives about 1350 W/m2
to combat wasteful habits we often speak of "conserving engery", by which we mean turning off lights, find the difference in energy conservation and conserving energy
A beam of protons at an accelerator creates a current of 120 mu/A. If the beam is focused on a target, how many protons strike the target in 30.0 s
the counting rate from a radioactive source is 8000 countss at time t0 while 10 mins later the rate is 1000 countss.a
A bluetooth headset has an intensity of 0.08 W/m2 at 5 cm distance. what is the total intensity (headset plus phone) at the center of your brain
A 250g , 30.0-cm-diameter turntable rotates on frictionless bearings at 62.0 rpm . A 22.0 g block sits at the center of the turntable. A compressed spring shoots the block radically outward along a frictionless groove in the surface of the turntable...
A 59.0 kg pole vaulter running at 9.5 m/s vaults over the bar. If the vaulter's horizontal component of velocity over the bar is 1.5 m/s and air resistance is disregarded, how high was the jump.
A 1.05 g samara (the winged fruit of a maple tree), falls toward the ground with a constant speed of 1.1 m/s. what is the force of the air resistance exerted on the samara?
A car is driving directly north on the freeway at a speed of 101 km/h and a truck is leaving the freeway driving 90 km/h in a direction that is 34° west of north
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