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A copper rod is 30 cm long and has a cross-sectional area of 1 cm^2. The coefficient of thermal conductivity is 100 W/mK. If there is a 20 degrees Celsius difference in temperature from one end of the rod to the other, what is the heat flow along the rod?
The wavelength of the x-radiation we use in our diffractometer is 1.54Angstroms. What is the ratio of the energy of these x-ray photons to the energy in the most energetic of visible light? Given this discuss why x-rays are considered dangerous to pe..
A woman on a bridge 86.8 m above a stream sees a bottle floating along at a constant speed. Calculate the speed of the bottle
A spacecraft is traveling with a velocity of v0x = 4330 m/s along the +x direction. Two engines are turned on for a time of 728 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 1.74 m/s2.
Find the acceleration of a forklift of mass 1400 kg pushed by a force of 2100 N that is opposed by a frictional force of 425 N.
Assume temperate is 20 degree C. A submarine 64m deep emits a sonar wave. How deep is the ocean at that point
question1a solenoidal coil with 26 turns of wire is wound strongly around another coil with 330 turns. the inner
A 0.031 kg aluminum bullet traveling at 487 m/s strikes an armor plate and comes to a stop. what is the bullet's temperature change in degrees Celsius
You have two small 2.0- balls that have been given equal but opposite charges, but you don't know the magnitude of the charge. To find out, you place the balls a distance apart on a slippery horizontal surface, release them, and use a motion detec..
A 0.80 kg framed picture hangs by a light wire on a nail. The 50 cm long wire is attached to both ends of the 40 cm wide picture frame, What is the tension in the wire
A 1.50 multiplied by 103kg car starts from rest and accelerates uniformly to 18.50m/s in 13s. Assume that air resistance remains constant at 400N during this time.
A high-voltage transmission line carries 500 A at 700 kV for a distance of 100 miles. what is the power loss due to resistive losses
A string with a length of 2 m resonates in three loops as shown above. The string linear density is 0.05 kg/m and the suspended mass is 1.5 kg. What is the frequency of oscillations
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