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A light bulb is connected to a 240 Vwall socket. The current in the bulb depends on the time t according to the relation I = (2.121 A) sin[ (439.6Hz) t ].a) What is the frequency of the alternating current?b) What is the resistance of the bulb's filament?c) What is the average power delivered to the light bulb?
A cyclist starts from rest and coasts down a 4.0?hill. The mass of the cyclist plus bicycle is 85 kg. Ignore air resistance and friction. How fast is the cyclist going
If the coefficient of volume expansion of mercury is 18x10(^-5) (K^-1), what is the coefficient of volume expansion in the glass?
Light is emitted by a sodium sample that is moving toward Earth with speed v. The wavelength of the light is 589 nm in the rest frame of sample. The wavelength measured in the frame of Earth is 537 nm. Find v.
A spring-loaded cannon aimed at 47 deg. above the horizontal is on the last car of a long train of flat cars. How far from the cannon on the train does the projectile land
What is the charge on negative electrode. Find out the wavelength.
A dampled harmonic oscillator is made from a 0.8kg mass on a k=14N/m spring with a damping constant of 400g/s, what is the initial energy of the oscillator
A particle falls to Earth starting from rest at a great height(many times Earth's radius). Neglect air resistance and show thatthe particle requires approximately 9/11 of the total time of fallto traverse the first half of the distance. [Note: You wi..
A soccer ball is kicked with a speed of 9.55 at an angle of 55.0 above the horizontal.If the ball lands at the same level from which it was kicked, how long was it in the air
A child holds a candy bar 10.0 cm in front of a convex mirror andnotices that the image is only one-half the size of the candy bar. What is the radius of curvature of the mirror?
If this amount were shaped into a cube, what would be the length of one edge of that cube (in meters)
At what minimum speed must a roller coaster be traveling when upside down at the top of a circle (Fig. 5-34) if the passengers are not to fall out? Assume a radius of curvature of 9.4 m.
A student sucks on the end of a long tube which is initially filled with air and whose other end is in a large bucket of water which is open to the atmosphere. They manage to draw the water up a vertical distance of 5.09 m
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