Do electromagnetic waves require matter to travel?
1 answer:
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Answer:
A) since the density of the buoy is half the density of sea water when the buoy is at rest on an ocean half of the buoy will be submerged in water
B )angular frequency ( w ) =
c ) h = 1.34 m ( 4 / 3g )
Explanation:
A) since the density of the buoy is half the density of sea water when the buoy is at rest on an ocean half of the buoy will be submerged in water this is because the substances with lesser density floats when placed in a substance with a higher density
B ) when the Buoy is at rest ( t = 0 ) and is then pushed down calculate angular frequency ( w ) of small oscillations in terms of the given variables
volume of cone = hA /3.
h = height of cone, A = Base Area.
therefore the total volume of the Buoy above water level ( at rest )
= ( ) * 2 =
The part of the buoy immersed in water = x
then the net upward force will be
fb ( force of Buoy ) = fg ( force of gravity )
note force = Mass * Acceleration
force of buoy = * a = ( force of gravity )
therefore a =
angular frequency ( w ) =
C ) height of the each cone
therefore w = 2
back to the angular frequency :
therefore h = 1.34 m ( 4 / 3g )
The correct answer is:
the distance of the orbiting object to Earth.
In fact, we know that the gravitational force that keeps the object in circular motion around the Earth is equal to the centripetal force, so we can write:
If we re-arrange the equation, we find an expression for the tangential speed of the object:
and we see that it depends on 3 quantities: G, M (the mass of the Earth) and r (the distance of the object from the Earth).