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3 years ago

With what new station is NASA going to support future Moon

Physics

1 answer:

Alex777 [14]3 years ago

3 0

Answer:

Explanation:

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The vacuum tube was replaced with what electrical component?

Rufina [12.5K]

Answer:

The vacuum tube was replaced with transistor.

Explanation:

The invention of semiconductor was very useful in making solid state transistor that allowed the production of small yet faster, cheaper, and more trusted and reliable computers.
These solid state transistor is so often used that, it nearly replaced all the use of transistor.
This replacement took place after the invention of semiconductor in the year around 1940.
Vacuum tubes also known as thermionic tubes are not used anymore in computers and electronics.

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3 years ago

Find the wavelength of light given off by a hydrogen atom when its electron drops from the n = 4 to n = 1 energy level

4vir4ik [10]

Answer: 1.55 x 10 -19J on top

Explanation:

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2 years ago

A student is trying to demonstrate static electricity, so they rub two identical balloons with a neutral rabbit fur to give them

Maksim231197 [3]

You can download answer here

tinyurl.com/wpazsebu

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3 years ago

a student uses a simple machine to help lift a load.when 40N of input force is applied to the machine it is able to lift 160N .w

Akimi4 [234]

4 to 1

Explanation If you look at it as a fraction 160/40 and you reduce it down as far as you can you get 4/1

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3 years ago

A 60-m-long chain hangs vertically from a cylinder attached to a winch. Assume there is no friction in the system and that the

Mariulka [41]

Answer:

part (a). 176580 J

part (b). 197381 J

Explanation:

Given,

Density of the chain = $\rho\ =\ 10\ kg/m.$
Length of the chain = L = 60 m
Acceleration due to gravity = g = 9.81 $m/s^2$

part (a)

Let dy be the small element of the chain at a distance of 'y' from the ground.

mass of the small element of the chain = $\rho dy$

Work done due to the small element,

$dw\ =\ \rho g (60\ -\ y)dy\\$

Total work done to wind the entire chain = w

$w\ =\ \displaystyle\int_{0}^{L} \rho g(60\ -\ y)dy\\\Rightarrow w\ =\ \rho g\left |(60y\ -\ \dfrac{y^2}{2})\ \right |_{0}^{60}\\\Rightarrow w\ =\ 10\times 9.81\times (60\times 60\ -\ \dfrac{60^2}{2})\\\Rightarrow w\ =\ 176580\ J$

part (b)

mass of the block connected to the chain = m = 35 kg

Total work done to wind the chain = work done due to the chain + work done due to the mass

$\therefore W\ =\ w\ +\ mgL\\\Rightarrow W\ =\ 176580\ +\ 35\times 9.81\times 60\\\Rightarrow W\ =\ 176580\ +\ 20601\\\Rightarrow W\ =\ 197381\ J$

4 0

3 years ago