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A power station delivers 510 kW of power at 12,000 V to a factory through wires with total resistance 3.5 . How much less power is wasted if the electricity is delivered at 51,000 V rather than 12,000 V?
In preparation for this problem, review Conceptual Example 7. After 0.640 s, how far beneath the cliff top is the pebble
Determine the length of a copper wire that has a resistance of 0.172 Ohms and cross-sectional area of 7.85 × 10^-5 m^2. The resistivity of copper is 1.72 × 10^-8 Ohms m
A field mouse trying to escape a hawk runs east for 4.0 , darts southeast for 3.0 , then drops 0.50 down a hole into its burrow. What is the magnitude of the net displacement of the mouse
Find the eight ball's speed after the colision. Parallel rays of green mercury light with a wavelength of 546 nm pass through a slit with a width of 0.437 mm. What is distance from the central maximum to the first minimum on a screen 1.75 mm away f..
The rectangle shown in Figure P3.57 has sides parallel to the x and y axes. Find the perimeter of the rectangle
2 positive charges each is 4 micro C located at the positions (0,0) and (20,0) and all coordinates are in cm, calculate the electric field due to the two charges
A banked circular highway curve is designed for traffic moving at 67km/h. The radius of the curve is 209 m. Traffic is moving along highway at 48km/h on a rainy day.
A red blood cell typically carries an excess charge of about -2.5 × 10-12 C distributed uniformly over its surface. What is the surface charge density on the red blood cell
A convex mirror has a focal length of magnitude 7.63 cm. Find the magnification of the image.
A power supply maintains a potential difference of 86.1 V across a 1070-? resistor. What is the current in the resistor
When on the ground, Ian's weight is measured to be 646 N. When Ian is on an elevator, his apparent weight is 743 N. What is the net force on the system
You push with a 20 N horizontal force on a 2 kg mass resting on a horizontal suface against a horizonatal friction forces of 12N. What is the accerlation.
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