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On a map with 1 cm = 3000 m scale, what is the equivalent ground length of a power transmission line which is 5.25 cm in the map?
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- What is the yearly cost of operating a 100-W television for 2 hours per day, assuming the cost of electricity is Php 11.00 per kw-hour.Ohm’s Law for alternating current circuits is V = IR, where V is the voltage in volts, I is the current in amperes, and R is the impedance in ohms. Each variable is a complex number.The AM radio band in a particular area has a frequency range of 554 kHz to 1620 kHz. How long is the wavelength of the radiation at the beginning of the range and how long is the wavelength of the radiation at the end of the range? Answer in units of m.
- Compute the frequency (in MHz) of an EM wave with a wavelength of 4.6 in. (0.1168 m). Give your answer to four digits.Lee watchesTV for 2 hours per day. During that time, The TV consumes 200 W per hour. Electricity cost 12 cents per 1 kilowatt hour. How much does lees TV cost to operate from a month of 30 days?A power transmission line is used to transmit 100 kW of power at a voltage of 10 kV with a loss of 1 kW. If the voltage is increased to 200 kV, what is power loss to transmit the same amount of power?
- In a particular city, electrical energy costs $0.13 per kilowatt-hour. (Round your answers, in dollars, to at least two decimal places.) (a) How much does it cost to operate an old-style incandescent 40.0-W light bulb continuously for 24 hours? $ (b) A modern LED light bulb that emits as much visible light as a 40.0-W incandescent only draws 4.50 W of power. How much does it cost to operate this bulb for 24 hours? $ (c) A particular electric oven requires a potential difference of 220 V and draws 20.0 A of current when operating. How much does it cost to operate the oven for 4.30 hours? $A certain house uses an average power of 485 Watts all day, everyday, for a 31 day month. If the energy costs are $0.21 per KW-hour, what is the house’s energy bill for this month? (Your answer is in dollars, so put $ for the units. Also, you'll round your final answer to the nearest cent.)Your family decides to limit TV watching to 17 hours every week. If the power rating on your TV is 394 W and electricity costs $0.14per kwh, then the cost for the week would be $ Do not include the dollar sign, and round your answer to the nearest cent.
- Amateur radio operators in the United States can transmit on several bands. One of those bands consists of radio waves with a wavelength near 20.m. Calculate the frequency of these radio waves. Be sure your answer has the correct number of significant digits.A transforms has a voltage of 5000 V that comes out of it. If there are 3500 turns of wire on the output side of the transformer and 52500 turns on the input side, what is the voltage of the current going into the transformer in volts?1. Using the circuit below R₁ 21 Vo R₂ +|1| V₁ R3 system of equations for the unknown currents, i1, 12 and 13 if R₁ = 50, 502 with Vo = 20V and V₁ = 5V. (a) Write the resulting R₂= 200 and R3 (b) Write the augmented matrix for this system. (c) Use elementary row operations to bring the augmented matrix into Row Echelon form. (d) Find the values for i1, 12 and 13 if a solution exists.