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At 20.0°C, a mainly silicon resistor has a resistance of335 Ω, and a tungsten resistor has aresistance of 752 Ω. At this temperature, the siliconresistor has a temperature coefficient of resistivity of−0.070°C−1 and the tungsten resistor has acoefficient of 0.0050°C−1. At what temperature will their resistances be equal?
A 100 arrow is shot perpendicularly from a bow whose effective spring constant is 500. If the bow is drawn 75 before shooting the arrow, to what height does arrow rise.
A 0.2kg toy car rolls down ramp. If the car started from rest at a height of 0.30m, At what speed do the two cars move after the collision
A hydrogen atom emits a photon having an energy of 12.1 eV. What's the frequency of the photon
A ballerina spins initially at 1.06 revs/second when her arms are extended. She then draws in her arms to the body, find the work involved in increasing her angular speed
Suppose the light bulb in the figure below is replaced with a short wire of zero resistance, and the resistance of the rails is negligible, What is the current in the rod
A nucleus is moving in the direction at 4.8x10^5 m/s when it decays into an alpha particle (4He) and a 234Th nucleus. what is the speed of the thorium nucleus
A jet plane passes over you at a height of 4990 m and a speed of Mach 1.75. Find the Mach cone angle
A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x 10^-2 N. How much work is done by the variable force that stretches the collagen
A parallel plate capacitor has plates of area 2.0*10^3 and plate separation 1.0*10^4m. find the capacitance of this system if air fills the volume between the plates.
The skis have a thrust of 220 N. Sam's speed at the bottom is 45.0 {rm m/s}. Illustrate what is the coefficient of kinetic friction of his skis on snow?
The coil in the figure carries current i = 1.70 A in the direction indicated, is parallel to an xz plane, What is the magnetic torque (in unit-vector notation) on the coil
A model airplane of mass 0.870 kg is flying at constant speed in a horizontal circle at one end of a 28.0 m cord and at a height of 17.0 m. What is the acceleration of the plane
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