An "Electric Circuit" <span>is any path through which electrons can flow.
Hope this helps!</span>
Answer:
Explanation:
a ) Let angle of incidence and angle of refraction be i and r respectively .
submarine is 300 m away from the shore . The point where laser strikes the surface of sea is 90 m horizontally away .
Tan r = 90 / 120
= 3 / 4
.75
r = 37 degree
c ) sini / sin37 = 1.333
sini = .8
i = 53 degree
Tan 53 = 210 / h , h is height of the building .
h = 210 / tan 53
= 158 m
The centripetal acceleration is calculated using the following rule:
C = (v^2) / (r)
where:
C is the centripetal acceleration = 6.54 g = 6.54 * 9.8 = 64.092 m/sec^2
v is the speed of the centrifuge that we want to calculate
r is the radius of radius (length of centrifuge arm) = 15 m
Substitute with the givens to get the speed as follows:
64.092 = (v^2) / 15
v^2 = 961.38
v = 31.006 m/sec
Answer:
E)The gravitational force increases by a factor of 4.
Explanation:
Isaac Newton presented the law of Universal Gravitation in his book published in 1687, "Philosophiae Naturalis Principia Mathematica". According to this Newton's law, the more mass the objects possess, the greater the force of attraction, and the closer they are to each other, the greater that force will be.
All material particles and all bodies attract each other simply by having mass, in direct proportion to their masses.<u> Gravity has an infinite theoretical scope; but, the force is greater if the objects are close, and while they are moving away that force loses intensity in proportion to the square of the distance that separates the bodies</u>. For example, if one object moves away from another three times the distance, then the force of gravity is reduced to the ninth part or vice versa if the distance between objects decreases with a factor of 2, the gravitational force increases a factor of 4.
Newton's law of universal gravitation is expressed as follows
:
Fg = G * M1 * M2 / (r12)^2
Where:
Fg: gravitational force
G: it is the universal gravitation constant and is worth approximately 6,674 * 10 -11
M1 and M2: mass of objects
r12: distance between objects
Newton's 3rd law of motion states:
For every action, there is an equal or opposite reaction.
I believe they relate in that force is the backing of momentum.
