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Q. Consider the four charges , in which d = 2 cm, q = 2 nC, the +x-axis points to the right, and the +y-axis points up. What is the force on the 1 nC charge at the bottom? Give your answer in component form, using i and j for and , respectively.
Q. If a car traveling at 52 km/h will skid 24 m when its brakes lock, how far will it skid if it is traveling at 120 km/h when its brakes lock?
A proton is projected perpendicularly into a magnetic field that has a magnitude of 0.30 T. The field is then adjusted so that an electron will follow a circular path of the similar radius when it is projected perpendicularly into the field with t..
Mattwe pulls his little sister sarah in a sled on an icy surface, with a force of 60 N at an angle of 37 ° upward from the horizontal. If he pulls her a distance of 12m, then determine the work done by matthew?
A hollow spherical shell has mass 8.00 and radius 0.225. It is originally at rest and then rotates about a stationary axis that lies along a diameter with the constant acceleration of 0.905. What is the kinetic energy of the shell after it has turned..
On a certain amusement park ride, passengers are seated in a horizontal circle of radius 7.5m. the seats begin to rotate from rest and are uniformly accelerated for 21 seconds to a most rotational speeds of 1.4 rad/s.
A 25kg solid door is 220cm tall, 91cm wide. What is the door's moment of inertia for rotation about a vertical axis inside the door, 15cm from one edge.
define How long are the skid marks. calculate the time it takes the sled to go 21 m down the slope.
A 110kg clock initially at rest on a horizontal floor requires a 607N horizontal force to set it in motion. After the clock is in motion, horizontal force of 525 N keeps it moving with a constant velocity.
A sphere of mass 2.8 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes an angle of 40° with vertical when at rest.
How rapidly atom are assembled in this protein synthesis
A ranger in a national park is driving at 28.0 mi/h when a deer jumps into the road 225 ft ahead of the vehicle. After a reaction time t, the ranger applies the brakes to produce an acceleration of a = -9.00 ft/s2. What is the most reaction time a..
An electron is shot upward directly perpendicular to the lower plate of a parallel plate capacitor. Its initial velocity is 3.0 x 104 m/s. What must be the potential of the upper plate if the electron stops just before reaching it? The lower plate..
A 90° inverted cone contains water as shown. The volume of the water in the cone is given by V = (p/3) h3. The original depth of the water is 10 cm. A block with a volume of 200 cm3 and a specific gravity of 0.6 is floated in the water. Find the c..
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