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A hiker, who weighs 929 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 3690 N, and rests on two concrete supports, one at each end. He stops one-fifth of the way along the bridge. What is the magnitude of the force that a concrete support exerts on the bridge at the near end?
What is the difference between mass and weight? On earth, what is the weight of a 1 kg mass?
How many lines per centimeter must a grating have if there is to be nosecond-orderspectrum for any visible wavelength (400–750 nm)? (State the maximum number of lines per centimeter.)
A car owner forgets to turn off the headlights of his car while it is parked in his garage. how long will it take the battery to completely discharge
Pool players often pride themselves on their ability to impart a large speed on a pool ball. they have placed you in charge of determining the speed of the players\' break shots
A 0.347-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. Find the momentum of the electron
From illustrate what height did the student fall? Suppose that the only force acting on him during the collision is that due to the ground.
Find the position of the object to acquire real, magnified image, inverted, and virtual, upright image.
A spherical capacitor consists of two concentric spherical metal shells and has a radius a for the outer sphere and b for the inner sphere. Calculate the capacitance.
40 kJ of heat was added to a 500-g piece of wood whosetemperature then rose from 20 degrees C to 68 degrees C. What was the specific heat of the wood
find the vertex and the x-intercepts of the parabolay ax2 bx - cround your answers to one decimal
Fuel systems of modern cars are designed so thermal expansion of gasoline doesn't result in wasteful and polluting fuel spills. As an engineer, How large an expansion tank do you specify
A 1.5 solid sphere (radius = 0.20 ) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.50 high and 5.7 long. what is its rotational kinetic energy
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