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1. Sodium atoms emit 2.10 eV photons. What is the frequency of these photons? What is the wavelength? What is their speed in a vacuum?
2. Two sound waves (both having a 1.2 m wavelength) interfere with one another. The path-length difference is 2.4 m. What is the interference condition? Constructive or destructive? Breifly explain.
Is the answer destructive since the path length difference is half the wavelength of the two sound waves?
A 3.1 kg block slides down a frictionless ramp, as shown in the figure. The top of the ramp is 1.6 m above the ground; What is the speed of the block when it leaves the ramp
On aircraft carriers, catapults are utilized to accelerate jet aircraft to flight speeds in a short distance. One such catapult takes an 18,000 kg jet from 0-70 m/s in 2.5 s. What is the acceleration of the jet? How far does the jet travel as acceler..
A photocathode whose work function is 2.5 eV is illuminated by white light of wavelength range from 380 nm to 720 nm. What is the stopping voltage Vnot for this experiment
A 160-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 25° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest? ________rad/s
a proton travels with a speed of 4.6e6ms at an angle of 62 degrees west of north. a magnetif field of 2.4t points to
a bird migrating toward its summer nesting site travels 3200 miles in a direction 18deg east of north. how much farther
Two particles of masses M1 = 93000 kg and M2 = 4200 kg are initially at rest an a distance 148.1 km apart. The masses are let go, and as a result of the gravitational force the two masses move towards each other.
a particle of charge q is fixed at the origin of an xy coordinate system. at t 0 a particle m 0.934 g q 3.72 microc
A rocket of total mass 3180 KG is travelling in outer space with a velocity of 115 m/s. To alter its course by 35.0°, how much mass must be expelled
In your lab is a steel vessel having a volume of 15.0L you charge the vessel with 2.00 moles of H2 and 1.00 moles of O2. What is the partial pressure of the hydrogen
question a electric wire with 3.85a current is placed in a magnetic field of strength .97 t. the .54m long wire makes
What is the acceleration due to gravity g' on the space shuttle in orbit, 200km above the surface of the earth? The gravitational constant is 6.67 x 10^-11 N*m^2/kg^2, the radius of the Earth is 6.4 x 10^6 m, the mass of the Earth is 6 x 10^24 kg, an..
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