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An Ar+ laser emits radiation at a wavelength of 515 nm, and a power of 7 W. Determine how many argon ions at a minimum must undergo the emission per second in order to maintain this power output?
An 8.70-kg block slides with an initial speed of 1.51 m/s up a ramp inclined at an angle of 27.4 degrees with the horizontal. calculate the distance the block slides before coming to rest.
State clearly the difference (a) between electric potential and electric field, (b) between electric potential and electric potential energy.
In a proton accelerator, the energy of proton is 20MeV, the diameter of the beam is 2.0mm, Find the current density and the particle density in the beam
Two bumper cars moving on a frictionless surface collide elastically. What is the speed of the first bumper car after the collision
A 380-N, uniform, 1.50 m bar is suspended horizontally by two vertical cables at each end. A small object of weight 520 N is placed distance 0.5 m from the cable A. What is the tension in cable A.
A bullet is fired through a board 10.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board, Find the acceleration of the bullet as it passes through the board
The tangential speed of a particle on a rotating wheel is 3.5m/s. how long will the particle take to make one revolution
The drawing shows a person looking at a building on top of which an antenna is mounted. How tall is the antenna
A chair of weight 75.0 lies atop a horizontal floor; the floor is not frictionless. Using Newton's laws, calculate , the magnitude of the normal force that the floor exerts on the chair
How much time takes to release net radiant energy from body
A centrifuge in a medical laboratory rotates at an angular speed of 3500 rev/min. When switched off, obtain the constant angular acceleration of the centrifuge
It is 150 cm from your eyes to your toes. You are standing 196 cm in front of a tall mirror. How far is it from your eyes to the image of your toes.
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