Answer:
1.89*10⁶J
Explanation:
because 4500kg * 42m*10m/s² is 1890000J
<h3>
Answer:</h3>
pH = 5
<h3>
Explanation:</h3>
<u>We are given;</u>
- Concentration of a solution HI as 0.00001 M
We are required to calculate the pH of Hydronium ions.
- When the acid dissociates in water to;
HI + H₂O → H₃O⁺(aq) + I⁻(aq)
- The concentration of H₃O⁺ ions is 0.00001 M\
- We need to know that pH = -log[H₃O⁺]
Therefore;
pH =-log 0.00001 M
= 5
Thus, the pH of the hydronium ions is 5
To develop this problem, it is necessary to apply the concepts related to Faraday's law and Magnetic Flow, which is defined as the change that the magnetic field has in a given area. In other words
Where
B= Magnetic Field
A = Area
Angle between magnetic field lines and normal to the area
The differentiation of this value allows us to obtain in turn the induced emf or electromotive force.
In this case we have that the flat loop of wire is perpendicular to the magnetic field, therefore the angle is 0 degrees, since its magnetic field acts parallel to the area:
0 then our expression can be written as
From the same value of the electromotive force we have to
Replacing we have
Replacing with our values we have that
Therefore the magnitude of the induced emf in the loop is 0.0237V
On the other hand we have that the current by Ohm's Law can be defined as
For the given value of the resistance and the previously found potential we have to
Answer: California
Explanation:
The Big Dipper has eight stars in it. Seven are visible at a glance, while the eighth is a visible double star that is just detectable with the naked eye in an area with clear "seeing" and with good vision.
To first observe an easily recognizable change in the shape formed by these stars (to an observer without a telescope), someone can look high in the sky toward the northeast at a certain time of the year and you can't miss the Big Dipper at around 8 p.m from mid-northern latitudes which is California
I would say C. is the best answer.
