The correct answer is A. 32.5
Mechanical advantage is the ratio of force that is input into a machine to the force output.
Mechanical advantage of a wheel and axle is calculated by dividing the radius of the wheel by that of the axle.
MA=R/r where R is the radius of the wheel and r is the radius of the axle.
Substituting for the values in the question gives:
MA=26cm/0.8cm
=32.5
10/70×360°
=51.4°
hope thus helps
<h2>The atomic mass of silicon is 28.0855</h2>
Answer:
A. 3.3 m
Explanation:
Here, we have to use conservation of energy principle.
When the ball is at maximum height, the instantaneous velocity at that point is 0 m/s. So, the kinetic energy of the ball is also 0 at the maximum height. Thus, at maximum height, the energy possessed by the ball is gravitational potential energy only.
Now, when the ball reaches the ground, all the gravitational potential energy changes into kinetic energy because of the conservation of energy.
Therefore, the energy transformation can be given as:
Decrease in potential energy = Increase in Kinetic energy
Decrease in potential energy is given as:

Increase in kinetic energy is given as:

Therefore,

Now, plug in 8 for
, 9.8 for
and solve for height
. This gives,

Therefore, the maximum height reached by the ball is 3.3 m.
Answer:
Gaseous emissions from volcano formed the earth's atmosphere.
More than 80% of the earth's surface is volcanic in origin.
There are more than 500 active volcanoes in the world.
Explanation: