Physics, 26.08.2021 09:40 destiniout04231
Tại một đập thủy điện, mực nước ngọt ở phía sau đập có chiều cao h = 15m so với miệng cống xả nước (dùng để xả nước ra phía trước đập khi mực nước quá cao, được đậy bằng một nắp cống ngăn nước ra ngoài). Tiết diện nắp ống xả thải bằng 30cm2 khối lượng riêng nước là 1000kg/m3, tính áp lực tác dụng lên nắp do chênh lệch áp suất giữa bên trong và bên ngoài đập nước?
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Physics, 21.06.2019 19:00
Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied. true or false
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Physics, 21.06.2019 22:00
Atank holds 1000 gallons of water, which drains from the bottom of the tank in half an hour. the values in the table show the volume v of water remaining in the tank (in gallons) after t minutes.t(min) 5 10 15 20 25 30v(gal) 694 444 250 111 28 0(a) if p is the point (15, 250) on the graph of v, find the slopes of the secant lines pq when q is the point on the graph with t = 5, 10, 20, 25, and 30.(b) estimate the slope of the tangent line at p by averaging the slopes of two secant lines.(c) use a graph of the function to estimate the slope of the tangent line at p. (this slope represents the rate at which the water is flowing from the tank after 15 minutes.)show all steps.
Answers: 2
Physics, 22.06.2019 06:00
A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s
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Physics, 22.06.2019 06:00
Why don't you see your reflection in water with waves or repples
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Tại một đập thủy điện, mực nước ngọt ở phía sau đập có chiều cao h = 15m so với miệng cống xả nước (...
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