Under what circumstances would you use a dissecting microscope?
What will be an ideal response?
A dissecting (stereo) microscope should be used to look at surface features of
macroscopic objects. A stereo microscope is also useful when you want to observe the
behavior of a small, but still visible, live organism. Living specimens can be placed in
small transparent dishes that prevent the organism from injury or drying out due to
the heat produced by the microscope's light. The working distance (distance between
the stage and the objective lens) of a stereo microscope is much larger than that of a
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compound light microscope. It is possible to view living organisms in culture dishes
using a stereo microscope.
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The insulating concrete form system sandwiches a layer of concrete between panels of _____.
a. fiberglass-reinforced plastic b. polyvinyl chloride c. foamed polyurethane d. expanded polystyrene
The armature circuit of the motor is connected to a full-wave, ac/dc SCR converter. The input voltage to the converter is 300 V (rms). The armature resistance of the motor is 0.5 ?, and the field constant (K?) is 2.5 Vs. Assume that the armature current is always continuous. Calculate the range of the triggering angle to operate the motor at a speed range of 0 to 600 rpm.
A dc, separately excited motor is driving a load torque composed of two
components as given in the equation.
Which of the following statements is NOT true about the Firewire Serial Communication?
A) An implementation of IEEE 1394 serial bus standard. B) The ability to chain devices together in a number of different ways without terminators. C) A single plug-and-socket connection on which up to 63 devices can be attached. D) It has a lower data transfer rate than the Universal Serial Bus (USB).
Isometric drawings are 1 1/2 times larger than the actual representation.
Answer the following statement true (T) or false (F)