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A laser shines on a pair of vertical slits. Given the measurements shown in the figure, calculate the wavelength of the light. (The illustration is not to scale. Note that the ruler measures in centimeters.)
An instructor wants to use a lens to project a real image of a light bulb onto a screen 2.27 m from the bulb. what focal length lens will be needed
A horizontal force of 142 N pushes a 11 kg block up a frictionless incline that makes an angle of 44° with the horizontal. find the normal force that the incline exerts on the block
A 1300 kg cartraveling at a speed of 37.0 {\rm m}/{\rm s} skids to a halt on wet concrete where mu_k = 0.500 . How long are the skid marks
two disks are rotating about the same axis. disk a has a moment of inertia of 7.64 kgmiddotm2 and an angular velocity
A cube made of steel 0.300 meters on a side is suspended from a scale until it is completely immersed in fresh water
A cart is propelled over an xy plane with acceleration components ax = 5.4 m/s2 and ay = -2.8 m/s2. In unit-vector notation, what is the velocity of the cart when it reaches its greatest y coordinate
A skater of mass 86.0 kg initially moves in a straight line at a speed of 4.70 m/s. what is the skater's final velocity
A straight 10-cm wire bent at its midpoint so as to form an angle of 90 degrees carries a current of 10 A. What is the magnitude of the magnetic force on this wire
A petite young woman distributes her 550{\rm N} weight equally over the heels of her high-heeled shoes. Each heel has an area of 0.650{\rm cm^2}. What pressure is exerted on the floor by each heel
Assume a dog's brain is twice as great in diameter as a cat's, but each animal's brain cells are the same size and their brains are the same shape. how many times more brain cells does a dog have than a cat
A 0.45mW laser produces a beam of light with a diameter of 1.5mm. What is the average intensity of this beam
A dock worker applies a constant horizontal force of 80.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. What is the mass of the block of ice
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