Answer:
A.
Explanation:
To solve this problem it is necessary to take into account the concepts related to angular velocity and centripetal acceleration,
from the cinematic equations of motion we know that
where,
V = Tangential Velocity
r = radius
Angular velocity
While the centripetal acceleration is given by
The displacement of the object is based on gravitational acceleration, so
a = g = 9.8 and the radius would be
Reemplazando:
Therefore the answer is A.
Answer:
I think it's dio to atmospheric pressure.
The correct answer is
<span>
C) 1200 g/m3. Let's see why. The relationship between liters and cube decimeters is
</span>
Therefore,
However, we also know that
Therefore,
and
Therefore, the density of the problem
becomes
Answer:
63.57 kg
Explanation:
weight = 140 lbs
Let the mass is m.
1 lbs = 4.45 N
The weight of an object is defined as the force with which our earth attracts the body towards its centre.
Weight is the product of mass of the body and the acceleration due to gravity of that planet.
W = m x g
On earth surface g = 9.8 m/s^2
Now convert lbs in newton
So, 140 lbs = 140 x 4.45 = 623 N
So, m x 9.8 = 623
m = 63.57 kg
Thus, the mass is 63.57 kg.
<span>Commonly when we talk about gases in science, we describe them as having the characteristics of a liquid. Imagine a rock in a bucket with liquid surrounding it. The liquid surrounds the rock and exerts pressure on it from all sides. Atmospheric pressure is much the same way. It surrounds the object and exerts pressure on it from all sides as well. Weight describes the force that gravity exerts on a mass whereas atmospheric pressure depends on the density of air at a certain point. If there were less air in our atmosphere (like Mars) the pressure would be much less and the opposite is true as well. However, the mass of a solid object would not change due to this change in air pressure and would weight the same regardless of the atmosphere.</span>