Physics, 28.11.2020 03:10 GravityShifter13
A 50kg boy stands on rough horizontal ground. The coefficient
of static friction, us, is 0.68. The maximum static friction
between the boy and the ground is __N.
Answers: 2
Physics, 21.06.2019 21:20
Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented.b)scientists had not completely finalized their results, which took 30 years.c)cigarettes were cheaply available and media channels were very inefficient.d)cigarette manufacturers were trying hard to bring an alternative into the market
Answers: 3
Physics, 21.06.2019 22:00
In a wind tunnel the speed changes as the cross sectional area of the tunnel changes. if the speed in a 6' x 6' square test section is 100 mph, what was the speed upstream of the test section where the tunnel measured 20' x 20'? use conservation of mass and assume incompressible flow. conservation of mass requires that as the flow moves through a path or a duct the product of the density, velocity and cross sectional area must remain constant; i.e., that ova-constant. a model is being tested in a wind tunnel at a speed of 100 mph if the flow in the test section is at sea level standard conditions, what is the pressure at the model's stagnation point? (a) the tunnel speed is being measured by a pitot-static tube connected to a u- tube manometer. what is the reading on that manometer in inches of water? (b) at one point on the model a pressure of 2058 psf is measured. what is the local airspeed at that point?
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Physics, 21.06.2019 22:30
How have the competing explanations' experiments on atoms affected the development of the atomic model?
Answers: 1
Physics, 21.06.2019 23:40
What is meant by the statement" the melting poin of glycerine is 13 degree celsius
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A 50kg boy stands on rough horizontal ground. The coefficient
of static friction, us, is 0.68. The...
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