Answer:
Explanation:
Given
Temperature of gas at First stage
Pressure of gas at First stage
Volume Occupies
If the Pressure and Temperature at second stage is
Using ideal gas Equation
where P=Pressure
V=volume
R=Universal Gas constant
T=Temperature
n=no of moles
as n and R is constant therefore
thus
Answer: 7.734 m/s
Explanation:
We have the following data:
The angle at which the water ballon was thrown
The horizontal distance of the water ballon
The acceleration due gravity
We need to find the initial velocity at which the water ballon was thrown, and we can find it by the following equation:
(1)
Where is the total time the water ballon is on air
On the other hand, when we talk about parabolic motion (as in this situation) the water ballon reaches its maximum height just in the middle of this parabola, when and the time is half the time it takes the complete parabolic path.
So, if we use the following equation, we will find :
(2)
Isolating :
(3)
Remembering :
(4)
Substituting (4) in (1):
(5)
Isolating :
(6)
(7)
Finally:
Using a lever to move a rock reduces the force a person must exert . It also reduces the work (effort ) the person must do.
Using a lever decreases the input force required to lift up the load, for example if a force of 900N is required to lift the load without a lever . Using the lever the input force decreases to 500N and as we all know by the formulae of work done :
Work done ∝ force applied
By this equation we can conclude that if the force to be applied on the load reduces by the use of a lever therefore the work to be done on the load will also reduce .
You can get a additional information about the lever system below :
brainly.com/question/3522307
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Answer:
i) Telescopes can be used to view far distant objects but the human eye can't view far distant objects.
ii) Telescopes uses two convex lenses producing a magnified image while the human eye only possesses one convex lens (image seen are smaller than that viewed under telescopes)
Explanation:
The telescopes can be used to view far distant objects due to their presence of two convex lenses. The two convex lenses are the objective lens (lens closer to object) and the eye piece lens (lens closer to eye). The object to be viewed forms an intermediate image first before the final image is seen using the eye piece lens.
The human eye only possess one convex lens and as such cannot view far ranged objects.
Answer:
14.79 kgm/s
Explanation:
Data provided in the question
Let us assume the mass of baseball = m = 0.145 kg
The Initial velocity of pitched ball = = 47 m/s
Final velocity of batted ball in the opposite direction = = -55m/s
Based on the above information, the change in momentum is
= 14.79 kgm/s
Hence, the magnitude of the change in momentum of the ball is 14.79 kg m/s