Answer: the atmospheric pressure is generally expressed in terms of the height of the mercury column.at normal temperature and pressure, the barometric height is 760mm at sea level which is taken as one atmosphere. thus atmospheric pressure is also expressed in a unit atmosphere where 1 atm= 0.76m of hg. 9
When you connect a light switch in parallel circuit, and when the switch is closed<span>, the switch lights up with normal brightness. </span><span>
The current entering the junction is split, with some of it leaving in one direction and the rest leaving the other way. Only part of the current flows through each device. On the other hand, each device "feels" the full voltage of the battery. </span>
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Pendulum period in seconds T ≈ 2π√(L/G) L is length of pendulum in meters G is gravitational acceleration = 9.8 m/s²
So the answers are the following:
a) use G = 9.8 + 5.0 = 14.8 m/s²b) use G = 9.8 – 5.0 = 4.8 m/s² c) 2π√(L/G) = 2pi √5/9.8 = 4.49 m/s^2
<h2>
Answer: The drag force goes up by a factor of 4</h2>
Explanation:
The Drag Force equation is:
(1)
Where:
is the Drag Force
is the Drag coefficient, which depends on the material
is the density of the fluid where the bicycle is moving (air in this case)
is the transversal area of the body or object
the bicycle's velocity
Now, if we assume , and do not channge, we can rewrite (1) as:
(2)
Where groups all these coefficients.
So, if we have a new velocity , which is the double of the former velocity:
(3)
Equation (2) is written as:
(4)
Comparing (2) and (4) we can conclude the Drag force is four times greater when the speed is doubled.