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Explain what Kirchhoff's Rules are, in your own words, provide any relevant formulas if a circuit is split from one wire into two different wires/paths, and explain what the variables in the formulae stand for.
Bolts work because they act like very strong springs and extend slightly when they are tightened. Suppose a steel bolt has spring constant 1.8x108 N/m. How far would it have to stretch in order to provide a force 2000N?
When we finish we have the same amount of water at 120 degree C, at standard pressure. What is the volume of Steam produced
What mass of water at 25.0° C added to a Styrofoam cup containing two 60.0-g ice cubes from a freezer at -17.0° C will result in a final temperature of 5.0°C for the drink?
A small object begins a free-fall from a height of H = 87.0 m at t0 = 0 s. After %u03C4 = 2.20 s, At what height from the ground will the two objects first meet
Consider a string with a length of 56.5 cm tied at both end (like on a stringed instrument). If the frequency of the first harmonic on the string is 267 Hz, determine the speed of the wave in the string. Post your answer in m/s and with 3 signific..
A daring ranch hand sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 12.0 m/s, and the distance from the limb to the level of the saddle is 4.00 m.
You have a 2.5kg copper block at room temperature. Find the energy required to melt the copper once it's reached the melting point
The string in a yo-yo is wound around an axle of radius 0.547 cm. The yo-yo has both rotational and translational motion, like a rolling object, and has mass 0.344 kg and outer radius 1.99 cm. Starting from rest, it rotates and falls a distance of 1...
A large oak tree produces 2.2 metric tons of wood over a 50 year growth lifespan. find the tree's efficiency for converting solar energy to wood heating value
Consider a closed triangular box resting within a horizontal electric field of magnitude E = 8.24 104 N/C. Calculate the electric flux through the vertical rectangular surface of the box.
a 47.5-g super ball traveling at 25.5 ms bounces off a brick wall and rebounds at 21.0 ms. a high-speed camera records
In the Bohr model of the hydrogen atom an electron (charge e =1.6 x 1019 Coulomb) rotates around the nucleus in a circular orbit of 0.5 x 10-10 m. Find the time it takes for the electron to rotate once
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