Answer:
Explanation:
Low density is an area of rarefaction.
Complete Question
The complete question is shown on the first uploaded image
Answer:
a
b
Explanation:
From the question we are said that
The mass of the shed is
The pulling force is
The angle is
The distance covered is
The kinetic force is
Generally the work done is mathematically represented as
=>
=>
Generally according to the work-energy theorem
Here is total work done which is mathematically represented as
=>
=>
Also is the change in kinetic energy which is mathematically represented as
Here u is the initial velocity of the shed when at rest
=>
So
=>
=>
Answer: The force needed is 140.22 Newtons.
Explanation:
The key assumption in this problem is that the acceleration is constant along the path of the barrel bringing the pellet from velocity 0 to 155 m/s. This means the velocity is linearly increasing in time.
The force exerted on the pellet is
F = m a
In order to calculate the acceleration, given the displacement d,
we will need to determine the time t it took for the pellet to make the distance through the barrel of 0.6m. That time can be determined using the average velocity of the pellet while traveling through the barrel. Since the velocity is a linear function of time, as mentioned above, the average is easy to calculate as:
This value can be used to determine the time for the pellet through the barrel:
Finally, we can use the above to calculate the force:
Answer:
It is very rare to see a solar eclipse from your home, because the Earth, Sun, and the moon need to align just right. Not everyone in the world can view a solar eclipse, only some area can. A solar eclipse is where the moon blocks out the sun. If you think about it: Let's say you live in Florida, U.S.A. You may see the moon coming in front of the sun, but if you lived in California or sumthin', the moon and the sun wouldn't be aligned to form a solar eclipse. It all depends on location... so it is rare to see one.
Answer: a few ton
Explanation:
Average-sized star like sun eave behind white dwarfs and they are almost of the same size as the earth due to gravity .
A teaspoon of white dwarfs is about 15tons.