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A steel beam is utilized in the construction of a skyscraper. By what fraction ΔL/L0 does the length of the beam increase when the temperature changes from that on a cold winter day (-23.4 °F) to that on a summer day (+108°F)?
A piece of copper wire has a resistance per unit length of 5.95 10-3 ?/m. Find the magnetic field strength at the center of the coil
A stone is dropped into the water from a bridge 144ft above thewater. another astone is thrown vertically down 1s after thefirst is dropped. what was the initial speed of the second stone
A transformer is used by a European traveler while she is visiting the United States. find the rate at which heat is generated in the transformer itself
The Earth is 93 million miles (mi) from the Sun and its period of revolution is 1 year = 3.15 x 10^7 s. What is the acceleration of the Earth in its orbit about the sun?
A prospector finds a solid rock composed of granite (ρ = 2650 kg/m3) and gold. Find what percentage of the rock is gold by mass
a circuit consists of a resistor in series with an inductor and an ac generator that supplies an rms voltage of 115 v.
An air-filled toroidal solenoid has a mean radius of 15.5cm and a cross-sectional area of 4.95cm2, How many turns does the winding have
Pendulum. A small rock with mass 0.22 kg is fastened to a massless string with length 0.70 m to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45° with the vertical. A
the problem statement all variables and givenknown dataa 20 kg child jumps in the air to try to shoot free throws while
A parallel-plate capacitor is formed from two 9.10cm x 9.10cm electrodes spaced 2 mm apart. The electric field strength inside the capacitor is 5.00*10^6 . What is the charge (in nC) on each electrode ?What is the final velocity of the electron.
An archer's bow is drawn at its midpoint until the tension in the string is 1.07 times the force exerted by the archer. What is the angle between the two halves of the string
molecules conserve energy and mometum when they absorb photons. an h2 molecule at 250k absorbs a uv photon with a
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