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Find the minimum frequency a photon must have if it is to ionize the n = 1 state of a doubly ionized lithium atom.
A parallel-plate capacitor in air has a plate separation of 1.42 cm and a plate area of 25.0 cm2. What is the change in energy of the capacitor
question1loudspeaker of mass 25.0kg is suspended a distance of h 2.40m below the ceiling by two cables that make equal
An object is placed 19 cm to the left of a converging lens of focal length 25 cm, Find the position and magnification of the final image
(a) How many times does PSR 1937+21 rotate in 77.0 days? (b) How much time (in s) does the pulsar take to rotate 5.00 × 106 times and (c) what is the associated uncertainty, in s?
a ball of mass 0.203 kg has a velocity of 1.43 ms right a ball of mass 0.291 kg has a velocity of 0.396 ms left. they
A wave pulse travels down a slinky. The mass of the slinky is m = 0.85 kg and is initially stretched to a length L = 6.5 m. What is the speed of the wave pulse
Find the net downward force on the tank's flat bottom, of area 1.60 m^2, exerted by water and air inside the tank and air outside the tank.
A drop of mercury released in the ocean and it sinks. Calculate the percentage change in the volume of the drop of mercury when it is at a depth of 1.0 km below the ocean surface
You have a 10.9 m straight wire carrying a 9.89 A current. What is the magnitude of the force on the wire when it is in a 0.83 T magnetic field perpendicular to the wire
A 10-kg box is at rest on a horizontal frictionless surface, at the end of an unstretched horizontal spring with constant k=4000 N/m, What is the speed of the box when it passes back through the equilibrium point
A 5.6cm diameter horizontal pipe gradually narrows to 4.6cm . When water flows through this pipe at a certain rate, What is the volume rate of flow
Vector A points in the negative x direction. Vector B points at an angle of 60 above the positive x axis, Given A+B+C=0, find the magnitude of A and B
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