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A LASIK vision correction system uses a laser that emits 10 -long pulses of light, each with 2.5 of energy. The laser is focused to a 0.90 -diameter circle.
What is the average power of each laser pulse?-in W
What is the electric field strength of the laser light at the focus point?- in N/C
An atom is ionized so that it has only one electron. When the electron drops from the n = 3 shell to the n = 1 shell, an X-ray of wavelength 232.59 pm is emitted. What is the atomic number?
A potter's wheel is a uniform solid disk of diameter 0.72m and a mass of 60kg. what minimum total friction force must the potter supply to the disk if her hands are acting at the edge of the disk
A heat engine operates between two reservoirs at temperatures of 19.5oC and 313oC. What is the maximum efficiency possible for this engine
suppose the PASCO track is 120 cm long. Assume the track is frictionless, and suppose one end is lifted by 1.66 cm. Find the angle between the track and the horizontal
A 1.35 kg object is moving in the x direction at 16.4 m/s. Just 3.61 s later, it is moving at 28.8 m/s at 36.0^circ to the x axis. What is the magnitude of force applied throughout this time.
an electromagnetic wave strikes a 2.60 cm2 section of wall perpendicularly. the rms value of the waves magnetic field
The minimum take off speed for an airplace is 75 m/s. What minimum acceleration is required if the plane must leave a runway flank of 1050 meters
A high-speed photograph of a club hitting a golf ball is shown in the figure below. The club was in contact with a ball, initially at rest, find the average force exerted on the ball by the club
The truck is parked on the platform of a weight scale. Explain by how much does the scale reading exceed the weight of the truck and sand?
The speed of the fastest-pitched baseball was 41.0 m/s, and the ball's mass was 145 g. How many joules of kinetic energy did this ball have
Let the mass of object 1 be m and the mass of object 2 be 3m. what are the velocities of the two objects after the collision
An ordinary glass is filled to the brim with351.0mL of water at 100°C. If the temperature decreased to29°C, how much water could be added to the glass
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