Answer:
Explanation:
The maximum charge on the capacitor will be, at the end of the process, given by the formula (and for our values):
The maximum current on the resistor will be, at the beginning of the process, given by the formula (and for our values):
B. False
because kilogram is the unit of mass.
Answer:
μs = 0.333 and μk = 0.24
Explanation:
Mass of crates = 22kg
F = 72newton
F =μR
Also given that g = 9.8m/s^2 which is that acceleration due to gravity
Hence R = N = mg
= 9.8 × 22
= 215.6 newton
F is frictional force
μ is coefficient of friction
N or R is normal reaction
Hence, the static friction
F =μsR
72 = μs × 215.6
μs = 72/215.6
μs = 0.333
The kinetic friction coefficient
F =μkR
When F = 52N and R = N = 215.6N
52 = μk × 215.6
μk = 52/215.6
μk = 0.24
On the day of the summer solstice, at noon, Eratosthenes was aware of a deep well on the Nile close to Aswan where the sun shone all the way to the bottom. Because the sun was not overhead in Alexandria, the length of that shadow was not zero.
We believe that the light rays from the sun that reach us are all traveling in the same direction; they are parallel, as the sun is thought to be extremely far away. No shadow would be formed by a vertical stick at point A, a "moderate" shadow by a stick at point B, and a very long shadow by a stick at point C. A radius of the earth leading to point A is shown on the diagram, and another leading to point B. A little geometry reveals that the angle between those two radii and the difference between the shadow angles are the same. In our example, the shadows indicate that during our journey from Florida to Pennsylvania, we had rotated the earth by about 10 degrees.
Learn more about shadow here-
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Answer:
Explanation:
The vector is :
A = -25i+45j
We need to find the angle between angle A and the positive x-axis. It can be calculated as follows :
So, the angle of vector A with the +x axis is .