Radio waves are used in cell phone wireless communication by this: Radio waves are released from the cell phone and travel to satellites in the stratosphere. After they reach the satellite, they are redirected to the recipient of the call/text.
Hope this helps! Can I have brainliest please?
A centripetal force is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path
Yes they transfer waves in order to get energy of mechanical
Answer: The answer is C
Explanation:
i did it on usatestprep :)
Answer:
The data that we have is:
Initial height = 2m
Initial vertical speed: As the sister is only pushed, we can assume that we do not have initial speed in the vertical axis.
Then at the beginning, we only have potential energy, that (using the water as the zero in our axis) can be written as:
U = m*g*h
where m is the mass of your sister, g is the gravitational acceleration, and h is the initial height:
h = 2m
g = 9.8m/s^2
Now, when your sister is about to touch the water, all the potential energy has be transformed into kinetic energy:
K = (m/2)*v^2
Then we have, at that moment:
K = U
(m/2)*v^2 = m*g*h
We want to solve this for v, that is the velocity.
v = √(2*g*h) = √(2*9.8m/s^2*2m) = 6.26 m/s
So the speed at which your sister hits the water is 6.26 m/s