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Two light bulbs use 30 W and 60 W, respectively, when connected in parallel to a 120-V source. How much power does each bulb use when connected in series across the 120-V source, assuming that their resistances remain the same?
A 21 kg block on a horizontal surface is attached to a horizontal spring of spring constant k = 2.3 kN/m, What is the kinetic energy of the block when it has moved 2.0 cm from its point of release
A piece of metal at 80 degrees celsius is placed in 1.2 L of waterat 72 degrees celsius. Estimate the approximate change in entropy for this process
A woman stands on a bathroom scale in a motionless elevator. When the elevator begins to move, Find the direction of the acceleration
a 0.25 kg ball moving north at 7.7 m s strikes a wall obliquely and rebounds heading east with the same speed of 7.7 m
A 45.0 kg person, standing 1.3 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 2.80 m/s relative to the ground. Find out the resulting angular speed of the disk (in rad/s)
A 1432.0 g mass is on a horizontal surface with μk = 0.44, Calculate the distance the spring was compressed. What is the velocity of the mass as it loses contact with the spring
an apple crate with a weight of 375 N accelerates along a frictionless surface as the crate is pulled with a force of 19.5 N. what is the horizontal acceleration of the crate
In the bohr theory of the hydrogen atom an electron moves in acircular orbit about a proton. the radius of the orbit is0.53x10^-10m. find the electrostatic force acting on each particle
1. What are the differences between PSK and DPSK 2. What device can be used for generation of FSK signal
A motorcycle is traveling up one side of a hill and down the other side. Determine the maximum speed that the cycle can have while moving over the crest without losing contact with the road
A space traveler weighs 631 N on Earth. What will the traveler weigh on another planet whose radius is 2 times that of earth and whose mass is 3 times that of earth
Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to six times the earth's radius of 6.38 106 m
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