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in a particular region of the earth's atmosphere, the electric field above the earth's surface has been measured to be 153 N/C downward at an altitude of 241m and 171 N/C downward at an altitude of 398m. Calculate the volume charge density of the atmosphere assuming it to be uniform between 241 and 398m. Neglect the curvature of the earth.
Three unknown resistors are in a bin; let's call them red, green, and blue. When a Physicist connects the three resistors in series to a 30 volt source she measures 1A of current. what is the charging time constant
An AC power generator produces 50 A (rms) at 3600 V. The voltage is stepped up to 100 000 V by an ideal transformer and the energy transmitted throughout a long-distance power line with a total resistance of 100 Omega. What is the rms current in l..
A major-league pitcher can throw a baseball in excess of 44.6 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches catcher who is 18m away from the point of release.
A) Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat of the metal? B) Which is more useful for storing heat, this metal or an equal weight of water? defin..
In a photoelectric-effect experiment, the wavelength of light shining on an aluminum cathode is decreased from 249nm to 207nm. What is the change in the stopping potential
The Bunker Hill Monument is a 67 m tall granite obelisk that contains 294 steps. If it takes a 735N person 15 minutes to climb to the top, calculate the power of this person
A electric model train travels at 34.7 cm/s around a circular track of radius 1.61 m. Find the train's period of revolution
series circuit contains a resistor and one unknown element, which could be a resistor, a capacitor, or an inductor. What is the second element
Your temperature is 98.4 degrees fahrenheit. what is the wavelength corresponding to the largest intensity
the aorta is a major artery, rising upward from the left ventricle of the heart and curving down to carry blood to the abdomen, what is the magnitude (in m/s^2) of the blood's centripetal acceleration
A 120 V space heater has two power settings. The equivalent resistance at the two settings are 19 ? and a 37 ?, After making a guess, determine the power at the low setting
The damage caused by electric shock depends on the current flowing through the body; 1 mA can be felt and 5 mA is painful. What is the minimum voltage placed across the arms that would produce a current that could be felt by a person with dry skin
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