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A person with a remote montain cabin plansto install her own hydroelectric plant. A nearby stream is 3.00mwide and 0.500m deep. Water floes at 1.20m/s over the brink of awaterfall 5.00m high. The manufacturer promises only 25.0%efficiency in converting the PE of the water-Earth system intoelectric energy. Find the power she can generate.
A whale sends an undersea signal to its mate and then gets a response 4.5 seconds later. How far away is the whales mate
What is the potential drop within the battery if the internal resistance is 4.3ohms and a current of 2.7 ampere is passed through it
In a Young's double slit experiment, if the separation between the two slits is 0.050mm, find the spacing between the first order and second order bright fringes for light with wavelength of 600nm
A block is released at the top of a plane inclined at 30o with the horizontal. The block begins to slide and travels 1 m in 2 s. What is the coefficient of kinetic friction between the block and the plane?
A 45.0 kg person, standing 1.3 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 2.80 m/s relative to the ground. Find out the resulting angular speed of the disk (in rad/s)
A 14.5 gram, 78.6 centimeter long steel guitar string is vibrating in its fourth harmonic. What is the tension on the steel guitar 'string'
Initially stationary (the train starts at rest), a train has a constant acceleration of 0.6 m/s2, What is its speed after 21 s
A coin placed on a turntable rotating at 34.1 rev/min will stay there if its center is placed no further than 10.0 cm from the axis of rotation, What is the coefficient of friction between the coin and turntable
String 1 in the figure has linear density 2.90 and string 2 has linear density 3.20 . A student sends pulses in both directions by quickly pulling up on the knot, then releasing it. Consider the pulses are to reach the ends of the strings simultaneou..
Two steel guitar strings have the same length. String A has a diameter of 0.60 and is under 450.0 of tension. Find the ratio of the wave speeds
A compressed-air cylinder is known to fail if the pressue exceeds 100 atm. A cylinder that was filled to 20 atm at 22°C is stored in a warehouse. Unfortunately, the warehouse catches fire and the temperature reaches 900°C. What is the pressure ins..
An aircraft takes off at 203 km/h after accelerating from rest at 2.14 m/s2. What is the minimum runway length required
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