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Using information from the utility bills for the coldest month last year, estimate the average rate of heat loss from your house for that month. In your analysis, consider the contribution of the internal heat sources such as people, lights, and appliances. Identify the primary sources of heat loss from your house and propose ways of improving the energy efficiency of your house.
An LC circuit is built with a 20 mH inductor and an 8.0 microF capacitor. After what time is the capacitor fully charged
Calculate the angle θ that the trapeze cord
neglect air resistance for the following. a soccer ball is kicked from the ground into the air. when the ball is at a
A mass attached to a spring vibrates 15 times in 23.13 seconds. What is the linear frequency (in Hertz) of the mass
A negative charge of -0.550 exerts an upward 0.225 force on an unknown charge 0.285 directly below it. what is unknown charge
On a frictionless ice a variable force P in Newtons, expressed by P= 5 + 6 t, is applied to an initially stationary block of wood to move it across the ice until its final speed is V= 25 m/sec. The mass of the wood is M= 3 kg. Vectors P and V are ..
You roughly estimate that the roommate shines light rays on to the water at an angle of 52.1°. You know that air has an index of refraction of 1.0. Determine the index of refraction of the unknown liquid
While attempting to tune the note C at 523 Hz, a pianotuner hears 2.00 beats/s between a reference oscillator and the string. What are the possible frequencies of the string
q1. a caterpillar climbs up a one-meter wall. for every 3 cm it climbs up it slides down 1 cm. it takes 10 minutes for
Two blocks are connected by a very light string passing over a massless and frictionless pulley, Find the total work done on 20.0-N block if ?s=0.500 and ?k=0.325 between the table and the 20.0-N block
Two lenses, of focal lengths 2.4 cm and 32.0 cm, are used to build a small telescope, assuming that 2.4 cm is the focal length for the eyepiece. What is the angular magnification? How far apart are the two lenses in the telescope?
A 300 g bird flying along at 5.5 m/s sees a 10g insect heading straight toward it with a speed of 25 m/s. What is the bird's speed immediately after swallowing
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