Answer: a hydraulic machine has water or air controlled by pistons that are airtight, water does great forces and air when compressed or squeezed to make things move, take a CAT machine for example (if you live in america, its those big yellow trebuchets or cranes) they use a piston for the arm and in front of those pistons you have mainly water (if your using a CAT machine) and those pistons push the water to and from your machines arm to create movement.
as you can see, in this picture, the CAT has hydraulics running against the arms of the machine
Answer:
The average velocity for the time period beginning when t=1 and lasting 0.1 seconds = 16.40 ft/s.
Explanation:
Given that the height of the ball at time t is
The average velocity of an object is defined as the total displacement covered by the particle divided by the total time taken in covering that displacement.
If are the heights of the ball at time and , then the total displacement covered by the ball from time to is .
Thus, the average velocity of the ball for the time interval is given by
For the time interval, beginning when t = 1 second and lasting 0.1 seconds,
Answer: (A) 1.5 m
Explanation:
This situation is due to Refraction, a phenomenon in which a wave (the light in this case) bends or changes its direction when passing through a medium with an index of refraction different from the other medium.
In this context, the index of refraction is a number that describes how fast light propagates through a medium or material.
In addition, we have the following equation that states a relationship between the apparent depth and the actual depth :
(1)
Where:
is the air's index of refraction
water's index of refraction.
is the actual depth of water
Now. when is smaller than the apparent depth is smaller than the actual depth. And, when is greater than the apparent depth is greater than the actual depth.
Let's prove it:
(2)
Finally we find the apparent depth of water, which is smaller than the actual depth:
Answer:
speed = 0.8854539 miles per hour
= 0.8854539 mi/h
Explanation: