Physics, 13.04.2020 18:32, cherylmorton7302
An iron bar is placed in a flame, as shown below, and is heated until the end glows. The other end of the iron bar
soon becomes hot, too. Which of the following statements best describes what happens?
a. Radiation moves through the iron bar and is absorbed by the end not in the flame.
b. A convective flow of energy is set up inside the iron bar.
c. Energy is conducted from atom to atom along the length of the iron bar.
d. Air heated by the flame radiates down the iron bar and heats the end not in the flame.
Answers: 2
Physics, 22.06.2019 05:40, thomasalmo2014
Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.
Answers: 3
Physics, 22.06.2019 10:10, natalieagustinlop54
Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.
Answers: 2
Physics, 22.06.2019 17:30, realoneree
This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.
Answers: 1
An iron bar is placed in a flame, as shown below, and is heated until the end glows. The other end o...
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