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A cylindrical cable with 2.49 x 10-8 m resistivity carries a current of 1500 A. There is a potential difference of 1.8 x 10-3 V between two points on the cable that are 0.33 m apart. What is the radius of the cable?
A 9.58-m ladder with a mass of 22.2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 264 N. What is the net torque acting on the ladder
a boat takes 3.00 hrs to travel 25.0 km down a river then 6.00 hrs to return. how fast is the river moving
two positive point charges are a fixed distance apart. the sum of their charges is qt. what charge must each have in
In the Bohr model of hydrogen, the electron moves in a circular orbit around the nucleus. Determine the angular speed of the electron
A 0.20-kg object is attached to the end of an ideal horizontal spring that has a spring constant of 120 N/m. compute the amplitude A of the motion
a person exerts force of 35n on the end of an door 88 cm wide, what is the magnitude of torque if the force is exerted perpendicular to the door
calculate the emission temperature of the earth, if the planetary albedo is changed to that of ocean areas without clouds, about 10%
Aluminum is a very light metal with density of 2.7 g/cm^3. What is the weight in pounds of a solid sphere of aluminum of radius 50 cm
a spaceshipmo 10000 kg amp lo 42m is observed to be 42.2m long while traveling towards earth. determine the speed of
A skier (m = 63.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. Find the skier's total kinetic energy as she reaches the ground
A 3700-lb automobile (m = 1600 kg) starts from rest on a level road and gains a speed of 45 mi/h (= 72 km/h) in 33 s. What is the average net power delivered to the car during the 33-s interval
a series circuit has r400 ohm l10 mh c 0.1 micro farad and the frequency is 7960 hz what is the power factor ?and how
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