What are the elements needed for photosynthesis and how are they used?
What will be an ideal response?
Carbon dioxide is a chief ingredient of photosynthesis and is taken from the air. Water, the second
chief ingredient, is taken up by roots in liquid form or by stomata, specialized pores on the undersides
of leaves, in vapor form. Light must be present for this chemical reaction to occur. When there is no
light, there is no chlorophyll production and eventually, a plant will die. An important result is that
plants make pure oxygen from this process (photosynthesis), which then becomes available for the
animal kingdom to utilize.
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Most outboard CV joints are held onto the driveshaft by using a ________ at the end of the shaft.
A) Snap ring B) Circlip C) Cap screw D) Any of these
____ is the percentage that a 2-in. (51-mm) piece of weld will stretch before it breaks.
A. Charpy V notch B. Yield point C. Minimum tensile strength D. Elongation
It's 90 °F in the shop with high humidity. What pressure will be shown on the high-side pressure gauge (AC system on)?
A. 10 to 50 PSI B. 40 to 140 PSI C. 210 to 290 PSI D. At least 350 PSI
This diagram is for a hypothetical embryo of silver growing against an arbitrary mold wall. With the aid of this diagram:
(a) Compute the angle of contact, ?, of the embryo with the mold wall.
(b) Determine the magnitude of the factor that may be used to convert the homogeneous free energy needed to obtain a nucleus into that of the corresonding heterogeneous free energy.
