Answer:
add 44m/s and 22m/s then multiply it by 11
Explanation:
Refraction is the change in direction of a wave.
Diffraction is the bending of a wave around a barrier.
Answer:
B. twice as much kinetic energy
Explanation:
Lets take the mass of the first marble =2 m
the mass of the second marble = m
We know that velocity of particle does not depends on their mass that is the velocity of both mass will be same after dropping from the roof.
We know that kinetic energy of a mass is given as

Kinetic energy for heavier mass

Kinetic energy for light mass

KE=2 KE '
Form above two equation we can say that ,the kinetic energy for the heavier mass is twice the lighter mass.
Therefore the answer will be B.
Answer:
20.7
Explanation:
:0 because basis of the daily occured