State how to draw the three rays for finding the image position due to a thin lens
What will be an ideal response?
Ray 1 leaves the top of the object and is drawn such that it is parallel to the axis; therefore it emerges from the lens along a line through the focal point on the back side of the lens.
Ray 2 leaves the top of the object and is made to pass through the other focal point; therefore it emerges from the lens parallel to the axis.
Ray 3 leaves the top of the object and is directed toward the very center of the lens; therefore it emerges from the lens at the same angle as it entered.
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How does surface tension affect heat pipe performance?
What will be an ideal response?
The principle of conservation of energy states that if the total mechanical energy is a constant then
A. the momentum is always a constant B. no work is done on a system by any nonconservative forces C. no work is done on a system by any forces D. work is done on a system in order to conserve energy
In beta decay,
A) a neutron turns into a proton B) a helium nucleus is ejected C) a proton turns into an electron D) a proton turns into a neutron
What happens to a given mass of water as it is cooled from 4°C to zero?
a. expands b. contracts c. vaporizes d. Neither expands, contracts, nor vaporizes.