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The intensity of a cylindrical laser beam is 0.800 W/m^2. The cross-sectional area of the beam is 3.0*10^-4*m^2 and the intensity is uniform across the cross section of the beam.
a) What is the average power output of the laser?
b) What is the rms value of the electric field in the beam?
A beam of 16MeV deuterons (m=2mp) from a cyclotron falls on a copper block. The beam is equivalent to a current of 15 microA. At what rate is thermal energy produced in the block
Trucks with the noted masses moving at the noted speeds crash into barriers that bring them to rest with a constant force
A bird stands on a dc electric transmission line carrying 2540 A, What is the potential difference between the bird's feet
A light platform is suspended from the ceiling by a spring. A student with a mass of 74 kg climbs onto the platform. At what time does the maximum speed occur
A typical half life calculated from the simplest such theory, the SU(5) model, is about 10^32 years. How many protons are in all the oceans on earth
q1. a proton is travelling to the right at. it has a head-on perfectly elastic collision with a carbon atom. the mass
q1. a cart starts from rest at the top of the tilted track. assume the track is frictionless. the cart passes photo
In a serious accident, a nuclear power plant%u2019s reactor vessel cracks, and all of the cooling water drains out. how much energy will it take to melt the core
The longest "string" (a thick metal wire) on a particular piano is 2.0 m long and has a tension of 300.0 N. What is the total mass of the wire
Two small particles have charges Q1 = +2.5 C and Q2 = 5.5 C. If the magnitude of the electric force between the particles is 110 N, what is the distance between the particles?
A fire hose must be able to shoot a stream of water a specified height, straight up. Calculate the gauge pressure (difference between actual pressure
What is the distance between an object and its real image formed by a thin converging lens with focal length f, if the object distance is p? What is this minimum object-image distance
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