The microscope was invented in which of the following decades?

a. 1600s c. 1800s
b. 1700s d. 1900s


A

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Figure 34-8 In the accompanying diagram, what do part A and part B show?

What will be an ideal response?

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A ____ is a reinforcing piece of metal or plywood fastened to the truss, where members are joined.

A. span B. tail C. gusset D. web

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John F. Kennedy's strategy of flexible response

A. was an updated version of John Foster Dulles's doctrine of massive retaliation. B. was used in his battle with the leadership of the steel industry. C. called for a variety of military options that could be matched to the scope and importance of a crisis. D. required increased spending on a variety of nuclear weapons systems to be deployed around the world. E. cut back nuclear weapons in favor of guerrilla forces.

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Technician A says that the freezing point of a substance is the temperature at which the substance changes state from a solid to a liquid. Technician B says that the freezing point of a substance is the temperature at which the substance changes state

from a liquid to a solid. Who is correct? A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B

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