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1. Judging from its unit W/m · K, can we define thermal conductivity of a material as the rate of heat transfer through the material per unit thickness per unit temperature difference? Explain.
2. Define emissivity and absorptivity. What is Kirchhoff's law of radiation?
A 0.18 kilogram billiard ball whose radius is 3.3 centimeter is given a sharp blow by a cue stick. Obtain how long does the ball slide before it begins to roll without slipping
A constant-pressure insulated piston-cylinder device contains 1.7 kg of saturated liquid-vapor mixture of water at 150 kPa with an initial quality of 0.2. Calculate the change in energy of the contents
A moving 3.30kg block collides with a horizontal spring whose spring constant is 261 N/m.What is the speed of the block when it hits the spring
Keli weighs 456 Newton and she is sitting on a playground swing that hand .5 meter above the ground. find how much work was done on the swing by friction
Four 7.5 kilogram spheres are placed at the corners of a square of side 0.65 meter. Find what is its direction
Consider a stainless steel annular disk with an outer radius 56 mm and inner radius 7.7 mm. What is the moment of inertia of the stainless steel annular disk
What are the strength and direction of an electric field that will balance the weight of a 1.0 g plastic sphere that has been charged to -3.1 nC
The speed of a wave on a violin. A string is 288 m/s and on the G string is 128 m/s. Use the information to decide the ratio of mass per unit length of the strings. What assumptions were made?
an ideal monatomic gas undergoes a reversible expansion from specific volume v1 to specific volume v2. calculate the
The power is off for 34.0 s and throughout this time the flywheel slows as a result of friction in its axle bearings. Throughout the time the power is off, the flywheel makes 180 complete revolutions.
Do two (2) essays. Here is the first: You are to write on one specific species within these groups of bacteria.Rickettsia Chlamydia Mxobacteria Bacillus Clostridium Lactobacillus Actinomycetes. You must consult at least three to four scholarly ..
Light of wavelength 605 nm falls on a double slit, and the first bright fringe of the interference pattern is seen at an angle of 12.0° from the central maximum. Find the separation between the slits. µm
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