Estimate the temperature distribution through a bare 16 gauge copper wire conducting 1.5 amperes of electric current if the surrounding air is at 10ºC and the convective heat transfer coefficient is 65 W/m^2?K.
What will be an ideal response?
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Body A has a higher temperature than body B. Which of the following statements is true?
1.Body A will feel hotter than body B. 2.Body A contains more energy than body B. 3.If placed in contact with each other, energy will flow from body A to body B. 4.If placed in contact with a third body having temperature greater than body A, body B will absorb more heat than A. 5.More than one statement is true.
What collects the light in a reflecting telescope?
a. a mirror b. a lens c. your eye. d. a light bucket
A block slides down a frictionless inclined ramp and experiences no significant air resistance. If the ramp angle is 17
0° above the horizontal and the length of the surface of the ramp is 20m find the speed of the block as it reaches the bottom of the ramp, assuming it started sliding from rest at the top. A) 7.57 m/s B) 19.6 m/s C) 114 m/s D) 10.7 m/s
If a hydrogen atom in the ground state absorbs a 20.0 eV photon, what kinetic energy of the electron results?
A. this cannot happen B. 20.0 eV C. 13.6 eV D. 6.40 eV E. 33.6 eV