What is the minimum amount of thrust necessary for a vertically fired rocket to leave the launching pad? Can this thrust be reduced as the rocket gains speed? Explain
What will be an ideal response?
The thrust must be greater than the rocket's weight. If it isn't, there will be no net force upward and the rocket won't move upward. As fuel is burned, the weight of the rocket and its mass decreases. So the amount of thrust can be less as less mass is to be accelerated. About 90 percent of common rockets are the fuel they carry.
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Describe some impediments to national cohesion in Somalia
What will be an ideal response?
From January to June in the Northern Hemisphere
A) the ITCZ shifts north. B) the polar front shifts north. C) jet streams shift north. D) all of the above E) none of the above
World food production has been increasing faster than population
Indicate whether the statement is true or false
A ________ is the unit that represents the amount of energy required to raise the temperature of 1 g of water 1°C
A) joule B) calorie C) watt-hour D) kilowatt-hour E) volt