Answer:
The trip with less acceleration has it when the radius is smaller, for which Gertrude is right
Explanation:
We will propose the solution of this exercise, with the second law of / newton
F = m a
where the acceleration is centripetal, whose equation is
a = v² / r
where v is the linear speed of the chair and r is its radius from the turning point.
Acceleration depends on the two parameters: linear speed and radius, for which reason we must take them into account for an analysis.
angular and linear speeds are related
v = w r
therefore we see that the linear speed also changes with the radius, but the angular speed is constant for the entire apparatus; let's substitute to see which variable is more important
a = (w r)² / r
a = w² r
Since the angular velocity is constant, the relationship dependency is linear with the radius.
The trip with less acceleration has it when the radius is smaller, for which Gertrude is right
Bernice's problem is that it does not take into account that the acceleration depends on the two parameters linear speed and radius
Answer:
Explanation:
From the question we are told that
The electric filed is
Generally according to Gauss law
=>
Given that the electric field is pointing downward , the equation become
Here is the excess charge on the surface of the earth
is the surface area of the of the earth which is mathematically represented as
Where r is the radius of the earth which has a value
substituting values
So
Here s the permitivity of free space with value
substituting values
The formula we can use here is:
g = G m / r^2
where g is gravity, G is gravitational constant, m is
mass, and r is radius
Since G is constant, therefore we can equate two
situations:
g1 m1 / r1^2 = g2 m2 / r2^2
(10 m/s^2) r1^2 / m1 = g2 * (1/2 r1)^2 / (1/8 m1)
<span>g2 = 5 m/s^2</span>
I’m not sure about the first one, but I know that in order for a substance to be in a plasma stage it must be hot, so I would say C) for the second question :)