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Children are playing on a vertical slide that is 10m high. If humps were added to this slide, but the height remained constant, how would this effect the final speed?
A 20.00 kg child is on a swing that hangs from 3 m long chains. What is her maximum speed if she swings out to a 45.0 o angle.
There are 50x10^6 homes in the US. Each home has one light bulb which runs one hour per day. all have 75watt light bulbs. How much energy per year do they use for lighting
At Earth location, the intensity of sunlight is 1.5 kW/m2. by how much would Earth's mass increase in 1 day
Electrons in a television's CRT are accelerated from rest by an electric field through a potential difference of 2.9 kV, What is the speed of the electrons
Electromagnetic waves propagate through what? What is oscillating? What determines the velocity c in free space
A planet's moon travels in an approximately circular orbit of radius 5.4 107 m with a period of 7 h 21 min. Calculate the mass of the planet from this information
A train is rounding a circular curve whose radius is 2.00 multiply.gif 102 m. Find the magnitude of the total acceleration (centripetal plus tangential) of the train
An experiment finds that standing waves on a 0.800-m-long string, fixed at both ends, occur at 24.0 Hz and 32.0 HZ, but at no frequencies in between. What is the wave speed on the string
A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 340 km/h in a semicircular arc with a radius of 194 m. Determine the radial acceleration of the car at this time
An archer pulls her bow string back 0.40m by exerting a force that increases uniformly from zero to 25 N. How much work does the archer do in pulling back the bow.
Two identical pith balls are hung by insulating strings, touching each other, as in the picture below. The mass of each ball is 0.002kg. Determine the charge on each ball
A moth at about eye level is 5.9 cm in front of a plane mirror; you are behind the moth, 17.8 cm from the mirror. At what distance must you focus your eyes to see the image of the moth in the mirror, that is, what is the distance between your eyes..
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