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A laser is utilizes in eye surgery to weld a detached retina back into place. The wavelength of the laser beam is 517 nm, while the power is 1.25 W. Through surgery, the laser beam is turned on for 0.0539 s. Through this time, how many photons are emitted by the laser?
A small cylinder, with mass M, radius R=0.1 m,and moment of inertia 1/2 MR2, rolls up along acurved surface with an initial speed V=4 m/s. What is the cylinder's initial angular speed
A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, What is the initial angular velocity of the turbine
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. What is the refractive power of a magnifying glass that has an angular magnification of 7.9 when the image of the stamp is located at the near point
A thermodynamic system undergoes a process in which its internal energy increases by 490 J. At the same time, 250J of work is done on the system. Find the energy transferred to or from it by heat?
A block of mass 2 kg is attached to a spring. The block/mass system is on a horizontal frictionless surface. What is the maximum acceleration of the block
The magnitude of F is 306 newtons and it points at 93o measured counter clockwise from the positive x-axis. What is the y component (in newtons) of F.
The owner of a van installs a rear-window lens that has a focallength of -0.301m. When the owner looks out through the lens at a person standingdirectly behind the van, the person appears to be just 0.244 m from the back of the van, and appears to..
question1a 2 kg ball of clay travelling west at 10 ms collides with 1 kg ball of clay travelling north at 5 ms. what is
A machine puts out 100 Watts of power for every 1000 Watts put into it. What is the efficiency of the machine
A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. What is the mass of the aluminum chunk
an elastic cord has an unstreched length of 8.1 m and a cross-section of 2 cm2. if the youngs modulus of the material
A 19 g piece of Styrofoam carries a net charge of -8.5 µC, What is the charge per unit area on the plastic sheet
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