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A wire with a resistance of 5.1 ? is drawn out through a die so that its new length is 3 times its original length. Find the resistance of the longer wire, assuming that the resistivity and density of the material are unchanged.
What is the (a) magnitude and (b) angle (measured relative to the positive direction of the x axis) of the asteroid's acceleration.
In an X-ray tube electrons strike a tungsten target (W or "wolfram") after being accelerated through a potential difference V0. Estimate the minimum value of V0 required to observe the Kalpha peak.
The two surfaces of a plastic converging lens have equal radii of curvature of 24.5cm, determine the index of refraction of the plastic
The electrical power output of a large nuclear reactor facility is 890 MW. It has a 34.0% efficiency in converting nuclear power to electrical. What is the nuclear power output in megawatts
A loudspeaker of mass 22 is suspended a distance of = 1.6 below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of = 3.10.
Jamal pulls a 200N sled up a 28° slope at a constant speed by a force of 100N. Near the top of the hill he releases the sled, With what acceleration does the sled go down the slope
While a roofer is working on a roof that slants at 39.0 degrees above the horizontal, he accidentally nudges his 93.0 N toolbox, causing it to start sliding downward, starting from rest.
Two point charges Q1 = +5.25 nC and Q2 = ?2.15 nC are separated by 40.0 cm, What is the electric potential at a point midway between the charges
Calculate the energy in of a photon of radiation. A projectile is fired straight upward at 141 m/s. How fast is it moving at the the top of its trajectory? assume it is launched upward at 45 degrees about the horizontal plane. How fast is it moving..
An x-ray photon with wavelength 15.0 pm is scattered at 84.0 degrees by an electron, find the resulting kinetic energy of the electron
A mass of 1.62 kg stretches a vertical spring 0.328 m. If the spring is stretched an additional 0.136 m and released, how long does it take to reach the (new) equilibrium position again.
In a hydraulic system, the larger piston to be used to lift a 1670kg car has a diameter of 24.2cm, If instead compressed air at 115 psi of pressure is used, what is the largest mass car (in kg) that the system can lift
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