Sound waves will either be reflected (echo effect) or absorbed (dissipated) depending upon the material make-up of the barrier
Answer:
v = 14.7m/s
Explanation:
When the rock was at the top of cliff it had only Potential Energy and no Kinetic Energy but soon as the rock hit the ground all the Potential Energy converted into Kinetic Energy so by the Law of Conservation of Energy
because all of that potential energy got converted into kinetic energy so we use the following formula as we need to calculate the velocity (v)
here we know because the rock was under free fall motion so it had acceleration of 9.8 but we do not the height which is h but we do know the formula:
the height h is the displacement so we replace height with the following:
now, insert h = vt in the above equation
Answer:
F = 2.26 × 10⁻³ N
Explanation:
given,
length of rod = 11 cm
charge = 19 nC
linear charge density = 3.9 x 10⁻⁷ C/m
electric force at 2 cm away.
F = E q
integrating from 0.02 to 0.02 + L
F = 2.26 × 10⁻³ N
!ND he falls down or whatta is this a riddle or a question we can't help you if you are not clear gosh people ...