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Four point charges have the same magnitude of 2.57 10-12 C and are fixed to the corners of a square that is 4.20 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists at the center of the square.
The largest diamond ever found had a size of 3106 carats. One carat is equivalent to a mass of 0.200 g. determine the weight of this diamond in pounds
A disk released from the top of an inclined plane has a speed of 6.32 m/s at the bottom. How high is the upper end of the inclined plane
The driver of a 1800 {rm kg} car travelling on a horizontal road at 100 {rm km}/{rm h} suddenly applies the brakes. Because of a slippery pavement, the friction of the road on the tires of the car, which is what slows down the car, is 20.0% of the..
A living specimen in equilibrium with the atmosphere contains one atom of 14C (half-life = 5 730 yr) for every 7.70 1011 stable carbon atoms. Find the number of carbon atoms in the sample
A particle has a charge of +1.7 ?C and moves from point A to point B, a distance of 0.12 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric..
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber, If a sample of gold with a mass of 2.477g, is pressed into a leaf of 4.116 ?m thickness, what is the area (in m2)..
A 302g ball is tied to a string. It is pulled to an angle of 6.00 degrees and released to swing as a pendulum. A student with a stopwatch finds that 17 oscillations take 12.0s. How long does the string.
A 1 uF capacitor is charged when it is connected across a 9 V battery, Find the final charge and the voltage across the plates for the 1 uF and 2 uF capacitor
A pendulum bob of length L has its motion interrupted by the peg perpendicularly beneath the support. The bob is released when the string is horizontal. Find out the minimum value for y in order for the bob to swing in a complete circle. State thi..
A worker pushes horizontally on a large crate with a force of 304 N and the crate is moved 4.4 m. How much work was done.
Light with a photon energy of 4.5 eV impinges on the surface of a material with work function 0.4 eV to eject electrons
a 5600 kg mass car is taking a turn at 72 ms. if the frictional force here is 44000n what is the radius of curvature
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