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The internal temperature of a shed is 21oC and the external temperature is -15oC. The wall of the house is composed of: 0.5 inch Gypsum board, 3 inches of air, 1 inch of fibreglass, 0.5 inch of oak wood and 3 inches of brick.
a) Calculate the rate of heat loss per unit area of the wall. Express your answer in W/m2 (3)
b) A wall has an area of 120.0 sqft and a window has an area of 16.0 sqft. The window is made of a single piece of 0.5 inch thick glass. Calculate the heat loss for the entire wall. (2) Answer in units of kW
A mass is moving at in the +x direction and collides inelastically with a another mass of 4 kg moving at 7.1 m/s in the -x direction.
In a particular receiver in a wireless communications system, two signals are mixed together as part of the frequency down-conversion process.
Four identical charges (+2.9 µC each) are brought from infinity and fixed to a straight line. The charges are located 0.59 m apart. Decide the electric potential energy of this group.
an object moving with uniform acceleration has a velocity of 10.0 cms in the positive x-direction when its x-coordinate
A 36 µF air-?lled capacitor is charged to apotential di?erence of 1099 V. What is the energy stored in it
The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, Determine the cheetah's average acceleration during the short sprint
The velocity of an airplane with respect to the ground is 2.00 x 102 m/s at an angle of 30.0 degrees NORTH of EAST. What is the velocity of the air with respect to the ground
What is the strength in air of the electric field at a radialdistance of 0.70-cm from the middleregion of a 6.0-m long straight wirecarrying a uniform charge of 375.0 µC
Can someone assist me on different types of research methodology (such as quantitative, qualitative and mix methods) on Solar Power Energy? Which includes the proposal, research instruments/techniques used in a justification of decisions.
An object, at the top of a very tall building, is released from rest and falls freely due to gravity. Neglect air resistance and calculate the distance covered by the object between times t1 = 5.57 s and t2 = 7.59 s after it is released.
A 612 kg elevator starts from rest and moves upward for 4.00 s with constant acceleration until it reaches its cruising speed, 1.84 m/s. What is the average power of the elevator motor during this period
Block B in the figure weighs 740 N. The coefficient of static friction between block and table is 0.24; angle ? is 31°; Find the maximum weight of block A
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