What is a population?

An engineer is designing a process for a new transistor. She uses a vacuum chamber to bombard a thin layer of silicon with ions

adelina 88 [10]

Answer:

$E=5.7\times 10^{-3}\ V/m$

Explanation:

Given that

$m_p=5.18\times 10^{-26}\ kg$

re= 46 cm

Vp= 180 m/s

We know that

$E=\dfrac{\Delta V}{r}$

$\Delta V=\dfrac{1}{4}\dfrac{m_pv_p^2}{e}$

So

$E=\dfrac{1}{4}\dfrac{m_pv_p^2}{e.r_e}$

Now by putting the all given values in the questions

$E=\dfrac{1}{4}\times \dfrac{5.18\times 10^{-26}\times 180^2}{1.6\times 10^{-19}\times 0.46}$

$E=5.7\times 10^{-3}\ V/m$

So the average electric field is $E=5.7\times 10^{-3}\ V/m$ .

6 0

3 years ago

A ball is dropped off a 20.5 meter rooftop. What will the velocity of the ball just before it hits the ground?

ololo11 [35]

Answer:

6.40 m/s

Explanation:

Here we have to consider the conservation of energy

Potential energy of a object = Kinetic Energy

Mgh = 1/2 M (v)2

V = root 2gh

V = root 2*10*20.5

V = 6.40 m/s

4 0

4 years ago

A current of 02kA is traveling through a circularly looped wire. The wire makes 35 turns around an induced magnetic field of 8 9

PIT_PIT [208]

Answer:

The radius of the loop is $4.94\times10^{5}\ m$

Explanation:

Given that,

Current = 0.2kA = 200 A

Number of turns = 35

Magnetic field = 8.9 nT

We need to calculate the radius of one loop

Using formula of magnetic field

$B=\dfrac{N\mu_{0}I}{2r}$

$r=\dfrac{N\mu_{0}I}{2B}$

Where, I = current

N = number of turns

B = magnetic field

r = radius

Put the value into the formula

$r=\dfrac{35\times4\pi\times10^{-7}\times200}{2\times8.9\times10^{-9}}$

$r =494183.11\ m$

$r=4.94\times10^{5}\ m$

Hence, The radius of the loop is $4.94\times10^{5}\ m$

3 0

3 years ago

A large semi-truck is moving a house from one lot to another. The amount of force required to move the house 15.A horizontally a

dlinn [17]

Answer:

252J

Explanation:

Given parameters:

Distance = 72m

Force = 3.5N

Unknown:

Work done on the house = ?

Solution:

Work done is the force applied to move a body through a particular distance.

Work done = Force x distance

Now insert the parameters and solve;

Work done = 3.5 x 72 = 252J

5 0

3 years ago

What local constellation signifies the start of rainy season in the Philippines?

igor_vitrenko [27]

Answer:

Buwaya

Explanation:

Constellations are the patterns imagined by joining stars together. Ancient people used to imagine these patterns and further related the appearance of constellations with natural phenomenon. Similarly constellations can also be related with a particular season depending upon the visibility. For example, Orion signifies the start of the winters in Northern hemisphere.

The rainy season in Philippines starts in the month of June the same time when Buwaya (local name given to the box in Pegasus constellation) starts being seen in the sky after a brief period of disappearance from the sky.

7 0

3 years ago

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