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a.) Calculate the number of electrons in a steel iron pinhead. The pinhead may be assumed to be spherical with a diameter 2mm.
b.) How many electrons would have to be added to the pin until it has a net negative charge of 1.00mC.
two extremely large nonconducting horizontal sheets each carry uniform charge density on the surfaces facing each other. find the surface charge density on the lower sheet
Two point charges q1= 5.00x10^-6C and q2= -3.0x10^-6C are located on x-axis at x1= -0.4m and x2=0.6m, Find the electric field and the electric potential at the origin
You heat a 507 cm3 sample of a substance from 131 °C to 265 °C, Calculate the coefficient of volume expansion of this substance
A 55.5 kg ice skater is moving at 3.99 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. What is the ratio of this force to her weight
suppose a force F1=25 N and F2=75 N acts on a particle of mass 1.0 kg, Determine the magnitude and direction of the resulting acceleration
A conducting rod of length 0.5 m slides along a frictionless table at a constant velocity 1.5 m/s. A uniform magnetic field of 0.75 T is normal to the surface.
Assuming the can to be a cylinder with a height of 15cm and a diameter of 6.4cm , find the net inward force exerted on the vertical sides of the can due to atmospheric pressure
A 62.00kg student is standing atop a spring in an elevator that is accelerating upward at 3.8 m/s2. The spring constant is 2600-N/m. By how much is the spring compressed.
Light of wavelength 470 nm in air enters a fishbowl filled with water, then exits by the crown-glass wall of the container. Find the wavelengths of the light (a) in the water and (b) in the glass.
A Molecule of DNA is 2.17 um long. The ends of the molecule become strongly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.78% upon becoming charged. Determine the effective spring con..
To get an idea of how empty deep space is on the average, perform the following calculations. Find the radius of a sphere of this volume in light years
A nuclear power plant produces an average of 4.90 × 103 MW of power during a year of operation. Find the corresponding change in mass of reactor fuel
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