2. El sonido de una ballena es en especial de frecuencia baja, pero existe una especie de ballena la Whalien cuya frecuencia es
1 answer:
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Answer:
The angle is 18.3 degree.
Explanation:
A uniformly charged infinite plane, density σ = 4 x 10^-9 C/cm^2, is placed vertically in air. A small ball of mass 8 g, with charge q = 10^-8 C, hangs close to the plane, so that the string is initially parallel to the plane. Take g = 9.8m/s2. When in equilibrium, by what angle is the string hanging the ball to the plane?
surface charge density, σ = 4 x 10^-5 C/m^2
Charge, q = 10^-8 C
mass, m = 0.008 kg
Let the angle is A and the tension in the string is T.
The electric field due to a plane is
Now equate the forces,
Answer:
(a) The range of the projectile is 37,336.3 m
(b) The maximum height of the projectile is 5,389.03 m
Explanation:
Given;
initial velocity of the projectile, u = 650 m/s
angle of projection, θ = 30⁰
(a) The range of the projectile is calculated as;
(b) The maximum height of the projectile is calculated as;
Reading of the scale will be given as Normal force on the man
So here we can say that
weight of the mas will be
normal force on the man will be given as
now net force is given by Newton's II law
a = 3.33 m/s^2
so elevator is accelerating downwards with an acceleration a = 3.33 m/s^2