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A conducting sphere of radius 20.0 cm carries an excess charge of +15.0 oC, and no other charges are present. (k = 1/4??0 = 8.99 × 109 N · m2/C2) The potential (relative to infinity) due to this sphere at a point 12.0 cm from its center is closest to :
8.0 moles of an ideal monatomic gas are compressed from a volume V1 = 0.26 m3 to V2 = 0.13 m3 at a constant pressure of 90 kPa
A 11.0-g bullet is fired horizontally into a 102-g wooden block that is initially at rest on a frictionless horizontal surface, what was the speed of the bullet at impact with the block
The power brick for the author's laptop computer has a power rating of 60 W. It uses a step-down transformer to convert the AC voltage from a wall socket (Vrms = 120 V) to a value near 12 V.
question aluminum metal is made industrially by electrolysis of al2o3 dissolved in molten na3alf6. how many grams of al
As part of a safety investigation, two 1900 kg cars travelling at 19 m/s are crashed into different barriers. Determine the average forces exerted on (1) car that hits a line of water barrels and takes 1.7 s to stop, and (2) car that hits a concre..
During a rockslide, a 760 kg rockslides from rest down a hillside that is 500 m long and 300 m high. How much energy is transferred to thermal energy
A soap film formed in a loop of wire is, because of its weight, not exactly uniform in thickness, but wedge-shaped in cross section. By how much does the film differ in thickness over the distance
A straight rod consists of a 1.2-cm-long piece of aluminum attached to a 2.0-cm-long piece of steel. By how much will the length of this rod change
A 120 g trick baseball is thrown at 51 km/h. It explodes in flight into two pieces, with a 50 g piece regular straight ahead at 86 km/h. How much energy do the pieces gain in the explosion.
a recreational aircraft has a lift- off speed of 110 km/hr. If the aircraft has a constant acceleration of 5m/s^2, what minimum runway length does it need for take off
The Yaver-Bomber flies purely horizontally and constantly at 200 m/s relative to the ground. It does so an altitude of 1000 meters. How far away from the fig tree does the near the balloon land
A 0.32 kg body undergoes simple harmonic motion of amplitude 9.1 cm and period 0.40 s. What is the magnitude of the maximum force acting on it
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