What tools and skills developed in Europe during the fifteenth and sixteenth centuries enabled European voyages of exploration?
a. Changes in ship-building resulted in ships that were lighter, more resistant to damage, and faster.
b. New ship-building techniques resulted in ships that were heavier, more resistant to damage, and with much larger carrying capacities for crews and supplies.
c. Changes in navigational tools led to the discovery of how to calculate longitude as well as latitude.
d. New types of gunpowder weapons were developed that allowed Europeans to carry as many as a dozen cannons on board, resulting in much more heavily armed vessels.
a. Changes in ship-building resulted in ships that were lighter, more resistant to damage, and faster.
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____ is a branch of mathematics that uses letters or other symbols to represent numbers, with rules for manipulating these symbols.
a. Algebra b. Trigonometry c. Calculus d. Geometry
Apples and pears are usually harvested by _____
a. vacuums c. human hands b. mechanical hands d. tree shakers
Two- color acrylic application requires use of all the following except:
What will be an ideal response?
Extruded polystyrene (XPS) insulation and polyisocyanurate (ISO) insulation are both closed-cell plastic foams, consisting essentially of the same chemical composition, and both have HCFC gas trapped in cell cavities. Yet their ?-values are different. The ?-value for ISO = 6.0 and that for XPS = 5.0. Why is that so?
What will be an ideal response?