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Question: A television (65w), a refrigerator (162w), a electric kettle (650w) and 10 lamps (40w) each are connected in series in a house. How much will it cost the house keeper to switch on all the appliances for 24 hours. if the cost of electricity is 15 kobo per kwh
What is a hydrogen bond? Why can't we destroy bothersome pollutants by just dissolving them in the ocean? Every time you use your bottle of vinegar-and-oil salad dressing, you have to shake it up. Why?
Light with a frequency of 2.95 x 1015 Hz ejects electrons from the surface of calcium, which has a work function of 2.87 eV. What is the minimum de Broglie wavelength of the ejected electrons?
In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. what beat frequency is heard when the hammer strikes the two strings simultaneously
A circular coil enclosing an area of 180 cm2 is made of 210 turns of copper wire. The wire making up the coil has resistance of 9.0 ?, what is the average current in the coil during that time
A 8.90-kg hanging object is connected by a light, inextensible cord over a light, frictionless pulley to a 5.00-kg block that is sliding on a flat table. Taking the coefficient of kinetic friction as 0.172, find the tension in the string.
Find the center of mass of the flat region plotted below which is of density one. First find Mx and My. (Hint: Do this by summing the moments of each piece)
a) What is the length of the bar in mm, when it is heated to 700.0 Farenheit.
Consider a conical pendulum with a bob of mass m = 95.0 kg on a string of length L = 10.0 m that makes an angle of ? = 3.00° with the vertical. Determine the radial acceleration of the bob
Two identical uniform bricks of length 26 m are stacked over the edge of a horizontal surface. What maximum overhang is possible for the two bricks (without tipping)
Compute the radial acceleration (in m/s2) of an object on the ground at the earth's equator, turning with the planet. The radius of the earth is R = 6380 km.
an automobiles wheels are locked as it slides to a stop from an initial speed of 30.0 ms. if the coefficient of static
What is the gear ratio of this gear train? Show your calculations! (Hint: which is the input gear and which is the output gear) Show in ratio form.
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