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1. A heater coil connected to a 220V ac line has a resistance of 42.1Ohm. What is the average power used?
2. What is the maximum value of the instantaneous power?
3. What is the minimum value of the instantaneous power?
the diameter of the vessel is 5.6 mm. In a 0.60-T magnetic field illustrate what is the magnitude of the voltage that is measured with the electrodes in the drawing?
Evaluate how much work is done (including the algebraic sign) if the gas then expands from 4.0 10-3 to 6.0 10-3 m3 under isobaric conditions?
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 3.45 × 10-11 m. Determine the magnitude..
An ideal monatomic gas expands isothermally from 0.500 m3 to 1.25 m3 at a constant temperature of 630 K, Find the thermal energy transfer Q
What total impulse was imparted by these forces. Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 12.0 cm-3, and their speed is 702 km/s. Find the current density of these protons.
What is the ball's velocity just after leaving the bat if the bat applies an impulse of ?8.4N?s to the baseball
He wants to row directly across a river 252 wide with a constant of 1.33 m/s. Illustrate what direction should he aim his boat, and low long will it take him to cross the river
Explain by how much does the potential energy of a 23.0-kg child increase when the child climbs a normal staircase to the second floor?
compass needle points 25 degrees E of N outdoors. However, as it is placed 17 cm to the east of a vertical wire inside a building it points 61 degrees E of N. What is the magnitude of the current in the wire? The earth field there is 0.50X10^-4 T ..
An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. This moon takes 21.0 days on average to complete one nearly circular revolution around the unnamed planet.
The nucleus of an atom consists of protons and neutrons (no electrons). A nucleus of a carbon-12 isotope contains six protons and six neutrons.
Two concentric hollow metal spheres have radii r1=1.50E-2 m and and r2=6.80E-2 m. At a point 9.80E-2 m from the center of the spheres, the electric field is directed outward and has a magnitude 2.08E+2 N/C. At a distance 5.80E-2 m from the center,..
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