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A distant galaxy is moving away from the earth with a speed that results in each wavelength received on the earth being shifted so that wavelength = 1.75 . Find the speed of the galaxy relative to the earth. Answer in units of c
What is the magnitude of the torque about the point where the beam is bolted into place.
A mechanic pushes a 3.20 X 10^3 kg car from rest to a speed of v, doing 5,100 J work in the process. find the horizontal force exerted on the car
A long horizontal wire carries a current of IT = 46.9 A. A second wire (I), made of 3.00 mm diameter copper wire and parallel to the first but L = 13.8 cm below it, What is the current in the lower wire
When an air capacitor with a capacitance of 350 nF (1 nF = 10-9F) is connected to a power supply, the energy stored in the capacitor is 2.00×10-5J, What is the dielectric constant of the slab
An object that is launched straight up from the ground reaches maximum height H and falls straight back down to the ground, Express the average speed over the entire trip as a function of H and T
An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.7 m (9 ft) is connected to an electric heater which draws 11.5 A on a 120-V line
The two cylinders both have a radius of 1mm. Material 1 has a conductivity of 1.2 x10^4 S/m and material 2 has a conductivity of 1.4 x 10^4 S/m. Piece 1 is 6cm long and piece 2 is 8cm long.
Light in vacuum is incident on the surface of a glass slab. In the vacuum the beam makes an angle of 41.5° with the normal to the surface, What is the index of refraction of the glass
A 4.0 kg mass is hung from a string which is wrapped around a cylindrical pulley (a cylindrical shell), what is the mass of the pulley
An aeroplane has wings with a surface area of 34 m2. The shape of the wings are such that air moving over the top of them travels 20% faster than the velocity of the air under the wing, what is the take-off speed of the plane
A 5-kg object moving with a velocity of 4m/s colides head on with a 10-kg object moving towards it at -3m/s. If the 10-kg object stops dead after the collision, what is the approximate coefficient of restitution for this collision
A 5.1kg mass hanging from a spring scale is slowly lowered onto a vertical spring, as shown in the figure(Figure 1) . a.) What does the spring scale read just before the mass touches the lower spring? b.) The scale reads 25 when the lower spring has ..
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