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A test charge of +3 µC is at a point P where an external electric field is directed to the right and has a magnitude of 4*106 N/C. If the test charge is replaced with another test charge of -3 µC, the external electric field at P does which of the following?
a) Changes in a way that cannot be determined b) reverses direction c) is unaffected
An unstable nucleus with a mass of 18 x 10-27 kginitially at rest disintegrates into three particles. one ofthe particles, of mass 4.8 x 10-27 kg, determine the third particle's speed
Assume instead the car hits a concrete abutment at full speed and is brought to a stop in 2 meter. Estimate the force exerted on the car
A 7.70cm length of straight wire runs horizontally along a north-south line. Find the magnitude of the magnetic force on the wire
a ferry boat transports tourists among three islands. it sails from the first island to the second island 4.76 km away
a sample of a diatomic ideal gas has pressure p and volume v. when the gas is warmed its pressure triples and volume
For some applications, it is important that the value of a resistance not change with temperature. For example, suppose you made a 4.60 kresistor from a carbon resistor and a Nichrome wire-wound resistor connected together so the total resistance is ..
An object is hung from a light vertical helical spring that subsequently stretches 2.0 cm. The body is then displaced and set in simple harmonic motion. Calculate the frequency at which it oscillates.
The Mariana trench is located in the Pacific Ocean at a depth of about 11 000 m below the surface of the water. For comparison, determine the weight of a jetliner whose mass is 8.19 × 105 kg
Two charges of +0.250 C are placed at the points (1.25 mm, 0) and (-1.25 mm, 0). A third charge of -0.450 C is placed at the origin. a. What is the electric field at the point (0, 2.20 mm)? b. At what point on the y-axis will E be zero? Show graph..
An electronic device dissipating 30 W has a mass of 20g and a specific heat of 850 J/kgoC. The device is lightly used, and it is on for 5 min and then off for several hours, throughout which it cools to the ambient temperature of 25 o C.
A bunch of grapes is located in a spring scale of a supermarket. Calculate the mass and weight of the grapes
A parallel-plate capacitor is made from two plates 12.5 cm on each side and 4.20 mm apart. obtain how much energy will be stored in the capacitor
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