1.)In England in the middle ages an extensive system of canals was used for tran
ID: 1313711 • Letter: 1
Question
1.)In England in the middle ages an extensive system of canals was used for transportation. Some of these canals crossed over canyons by flowing over bridges (viaducts). Suppose that a heavily loaded barge crossed over such a waterway bridge.
A.) the force on the bridge would not change when the barge passed over.
B.) The force on the bridge would become less because of the buoyancy effect of the water on the barge
C.) The force downward on the bridge would increase because of the added weight of the barge.
D.) Whether or not the force on the bridge would increase or decrease would depend on whether the water was flowing or stationary
E.) The force on the barge would become less because some water would be squeezed off the bridge.
2.) A person consumes a large meal containing 13kcal. What is the power this meal produces if it is to be
Explanation / Answer
Number 1)
Choice A - Archimedes Principle says the weight of the water displaced wll equal the weight of the barge so water will move out to when the barge is going over
Number 2)
13000 cal converts to 54392 J
P = Energy/time
P = 54392/(6)(3600)
P = 2.5 W (Choice A)
Number 3)
PV/T = PV/T (T must be in Kelvin)
1(.2)/(303) = P(.15)/(333)
P = 1.5 atm (Choice C)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.