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(1) A notebook computer wire carries 1.5 A. How many electrons pass through the wire each second? (2) A 50-W and 100-W light bulbs are both designed to operate at 120 V. Which one has a lower resistance? Explain your answer.
(3) Two resistors, with 3.0 and 6.0 Ohms each, are connected in series. What is the equivalent resistance of this combination?
An alpha particle (the nucleus of a helium atom) consists of two protons and two neutrons. what is the strength of the magnetic field
An 8.70-kg block slides with an initial speed of 1.51 m/s up a ramp inclined at an angle of 27.4 degrees with the horizontal. calculate the distance the block slides before coming to rest.
A cannon of mass 5.17 x 10 3 kg is rigidly bolted to the earth so it can recoil only by a negligible amount. The cannon fires a 74.3-kg shell horizontally with an initial velocity of 542 m/s. Suppose the cannon is then unbolted from the earth, and..
Suppose the coefficient of static friction between the road and the tires on a car is 0.575 and the car has no negative lift. What speed will put the car on the verge of sliding
An apple crate with a mass of 20 kg stands on a frictionless horizontal surface. A force F = 14.5 N is applied to the crate, find the normal force exerted by the surface on the crate
A cannon tilted up at a 30° angle fires a cannon ball at 65 m/s from atop a 12 m high fortress wall. What is the ball's impact speed on the ground below
A 0.15 kg baseball is hit by a baseball bat. Right before it is hit, the ball's speed is 30 m/s, find the magnitude of the net impulse that is applied to the ball
Every day our Earth receives 1.55×1022 J energy from the Sun. If we were able to use 1.05 percent of this energy to accelerate spaceships, then how many missions would be possible in one year
a positive charge of 5.30 oc is fixed in place. from a distance of 3.80 cm a particle of mass 6.00 g and charge 3.60 oc
A thin homogeneous plate has the shape of an equilateral triangle and is suspended from one apex, acting as a physical pendulum. Use the Lagrangian to obtain the equation of motion and find the frequency of small oscillations, assuming the motion tak..
two conductors having net charges of 10.0microc and -10.0 microc have a potential difference of 10.0 v between them.a
A 72 man's arm, including the hand, can be modeled as a 78 -long uniform cylinder with a mass of 3.7, by how much does he raise his center of gravity
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