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A slide projector needs to create a 98 cm high image of a 2.0 cm tall slide. The screen is 300 from the slide. How far should you place the lens from the slide
You press two flat pieces of glass together so that a very thin layer of air is trapped between them. What is the smallest spacing between the plates
The radius of the hydrogen atom is 0.053 nm. What is the frequency of the circular motion of the electron in the hydrogen atom
Find the critical angle for an optical fiber whose core has n value of 1.55 and whose cladding has n value of 1.20
A beam of light shoots from air into a piece of glass. If the refracted angle is half of the incident angle, what is the incident angle
A laser used in cutting or drilling metals produces 10 ns pulses at 1.00 J per pulse. what is the peak light intensity at the spot
A helium-neon laser beam has a wavelength of 633 nm in air. What is the wavelength of the light in that liquid
You were driving a car with velocity <31, 0, 14> m/s. You quickly turned and braked, and your velocity became <26, 0, 17> m/s. What was the (vector) impulse applied to the car by the grou
A radiator with a constant temperature of 150o C has a surface area of 5.00 m2. Calculate its rate of heat loss by radiation to the environment
Two cars of 2000 %u2013kg each collide head-on while traveling at 75.0 miles per hour. What is the temperature increase of the cars
On average, each American produces 20,000 kg of CO2 per year, mostly through the consumption of fossil fuel such as oil, coal, and natural gas. what would be the length of each side of the cube
A 113 gram apple falls from a branch that is 2.5 meters above the ground. Just before the impact, what is the speed of the apple
In outer space a rock of mass 8 kg is acted on by a constant net force <29,-18,43>N during a 5 s time interval. What was the rock's velocity at the beginning of the time interval
A tennis ball of mass 57 g travels with velocity < 70, 0, 0 > m/s toward a wall. After bouncing off the wall, What is the change in the momentum of the tennis ball
Two men decide to use their cars to pull a truck stuck in mud. What is the net forward force exerted on the truck in the direction it is headed
A dog and her handler are at rest and are facing each other at a distance 40.0meters. Find the (common) position where the dog and the handler meet
a tennis ball is fired from a gun that us mounted on the floor. the tennis ball has an initial speed Vo= 25.0m/s, what is the speed of the tennis ball when it reaches your racket
A simple harmonic oscillator has a restoring force of 360 N/m and a mass of .59kg. What will be its maximum displacement from equilibrium
If a simple pendulum of length 2.09 meters is subjcted to a restoring force of 3 Newtons when displaced .15546 meters from equilibrium, what is the mass of the pendulum
two objects of unequal mass hung vertically over frictionless pulley of negligible mass. Determine the magnitude of the acceleration of the two objects
A 210g , 30.0-cm-diameter turntable rotates on frictionless bearings at 61.0rpm. What is the turntable's rotation angular velocity when the block reaches the outer edge
A spring of spring constant k = 340 Nm-1 is used to launch a 1.5-kg block along a horizontal surface by compressing the spring by a distance of 18 cm. how far does the block slide
A 20-kg child swings back and forth on a swing such that her height h in m from the ground as a function of x is described by: h(x) = 0.5 + 0.45x2 for -1.2 m ? x ? 1.2 m, What is the maximum potenti
A bowling ball weighing 71.2{\rm N} is attached to the ceiling by a 3.70{\rm m} rope. find the tension in the rope
X rays diffract from a crystal in which the spacing between atomic planes is .200nm. what is the angle of the first-order diffraction