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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.
A worker on top of a radar tower 21.8 ft high drops a wrench off the tower. What is the speed of the wrench when it hits the ground
The diameters of the main rotor and tail rotor of a single-engine helicopter are 14.4 m and 2.1 m, respectively. What is the speed of the tip of the small rotor
Two wires A and B are of equal length. Each is attached at one end to the ceiling and to a weight at the other end. The cross-sectional area of A is 2.00 mm2 and that of B is 4.00 mm2.
a 0.15 kg. mass is attached to a vertical spring and descends adistance of 4.6 cm. below it's original position. What is the total extension of the spring
A 954 kilogram satellite orbits the Earth at a constant altitude of 99 kilometer. Determine the change in the system's potential energy
In compressing the spring in a toy dart gun, 0.6 J of work is done. When the gun is fired, the spring gives its potential energy to a dart with a mass of 0.08 kg, What is the dart's speed
If the capacitor and inductor in part A are connected in an L-C circuit, what will be the resonance angular frequency of that circuit
a circular conducting ring is split into two semi-circles. the top half has a positive charge q evenly distributed and
jose is looking to the east. lightning bolt 1 strikes a tree 300 m from him. lightning bolt 2 strikes a barn 900 m from
An alpha particle (q = +2e, m = 4.00 u) travels in a circular path of radius 7.00 centimeter in a magnetic field with B = 1.60 T. Determine its period of revolution
The electron density on the surface of a circular disc of radius 20 m is given as ne = 300ρ cos2 φ electrons/meter2. Determine the number of electrons residing on the surface of the disc. What is the total charge on the disc?
Given two vectors a = 3.6i -3.8j and b =6.2i+8.3j. Find the direction of the vector a-b
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