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An aluminum rod is 21.0 cm long at 20°C and has a mass of 350 g. If 15,000 J of energy is added to the rod by heat, what is the change in length of the rod?
A certain star is 14 million light years from Earth. The intensity of light that reaches earth from the star is 4X 10^ -21 w/m^2
Within a certain material, an EM wave with lamda=1um is attenuated to 10% of its originality intensity after propagating 10cm. Determine the imaginary part of the index of refraction ni.
Find an expression for the volume charge density ?(r) inside the ball as a function of r. Express your answer in terms of the variables Q, r, R, and appropriate constants
Two capacitors connected in parallel produce an equivalent capacitance of 35.0?F, What is the individual capacitance of each capacitor
A 9.0-V battery is connected to a bulb whose resistance is 2.7Ω. How many electrons leave the battery per minute
A plane leaves Seattle, flies 85.0mi{rm mi} at 22.0°^circ north of east, and then changes direction to 54.0°^circ south of east. After flying at 121mi{rm mi} in this new direction, the pilot must make an emergency landing on a field. The Seat..
A 4.0 kg mess kit sliding on a frictionless surface explodes into two 2.0 kg parts, What is the original speed of the mess kit
A disk is reputed to accelerate from 0 to 389 RPM in 3.5 seconds. How many radians does it turn through.
A screen is placed 50cm from a single slit. A laser of wavelength 635nm is shown on the slit resulting in a single slit diffraction pattern, What is the width of the central maximum
a cylindrical resistor of radius 1.0 mm and length of 1.0 cm has resistance of 10 ohms. calculate the uniform current density in the resistor when the power of the resistor is 1 watt
1. a spring with negligible mass stretches 34.0 cm when a 144 g gram mass is suspended from it. now inbspsuspend a
A block of ice slides 500 m down along a frictionless slope (slopes 20 degrees below horizontal). what is blocks speed at end of slop
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