The best way to prevent an eye injury is to__________.
A. use one hand to shield your eyes when grinding metal.
B. squint or blink rapidly when welding and do not look directly at the arc.
C. keep your eyes tightly closed when cutting metal.
D. always wear approved safety glasses.
Answer: D
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Under the Articles of Confederation, the relationship between the 13 states
A. improved to the point of total unity. B. was good economically but poor politically. C. led to a single currency. D. convinced many that a stronger central government was needed. E. was good politically but poor economically.
Only about seven percent of the earth’s surface is suitable for _____
What will be an ideal response?The biological phenomenon known as ____________________ results in offspring that are superior to what might be expected of the parents
Fill in the blank(s) with correct word
Refer to Figure P2.79 but assume that the cantilevered beam loaded by a force F is made of steel. Strain gauges R1, R2, R3, and R4 are attached to the beam and connected in the circuit shown. The force causes a tension stress on the top of the beam that causes the length (and therefore the resistance) of R1 and R4 to increase and a compression stress on the bottom of the beam that causes the length (and therefore the resistance) of R2 and R3 to decrease. The result is a voltage vBA across nodes B and A.
Determine this voltage if F = 1.3 MN and
Ro = 1k? vS =24V L = 1.7 m
w = 3 mm h = 7 cm Y = 200 GN/m2
