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2 years ago

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In Youngs double slit experiment the distance between the screen and the slits is 1.00 m. The slits separation is 0.050 mm and t

he distance between the central bright and first order bright is found to be 8.00 mm. Calculate the wavelength of the light used.

1 answer:

tester [92]2 years ago

8 0

Check attached photo

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What about the atomic model shown below was shown incorrect?

charle [14.2K]

In an atom there are neutrons, protons and electrons. the number of protons is the atomic number . the number of neutron is the atomic mass minus atomic number. the number of electrons is the number of protons.protons and neutrons are located in the middle of the atom. and in the first ring (the ring closest to the middle) it can hold 2 electrons if there is more than two it will go to the second ring (the second ring from the middle of the atom) in the second ring it can hold eight if there is more than eight it will go to the third ring from the middle and the forth ring from the middle can hold 12 atoms . the symbol for proton = +
the symbol for neutron = it has no symbols
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2 years ago

When does gravitational lensing occur? High concentrations of dark matter cause length contraction of nearby objects. The gravit

Stella [2.4K]

Answer:

A massive object (like a galaxy cluster) bends the light from an object (like a quasar) that lies behind it.

Explanation:

A massive object, like a galaxy cluster, is able to deform the space-time shape as a consequence of its own gravity, so the light that it is coming from a source that is behind it in the line of sight will be bend or distorts in a way that will be magnified, making small arcs around the cluster with the image of the background object.

This technique is useful for astronomers since they make research of faraway objects (at hight redshift) that otherwise will difficult to detect with a telescope.

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3 years ago

A box is dropped from a spacecraft moving horizontally at 27.0 m/s at a distance of 155 m above the surface of a moon. The rate

gavmur [86]

Answer:

a) 10.54 sec

b) 284.58 m

c) 29.406 m/s

d) 39.92 m/s

Explanation:

Given data:

velocity of spacecraft = 27.0 m/s

rate of free fall acceleration is 2.79 m/s^2

distance of moving aircraft from mooon surface is 155 m

a. from kinematic eqaution of motion we have

$y = Vi\times t + (\frac{1}{2}) a\times t^2$

where y = 155 m

Vi = 0 as this relation is for vertical motion, so the 27.0 m/s is not included

and a = 2.79 m/s^2.

Solving for t we get

t = 10.54 sec

b.

we know that $V = \frac{d}{t}$

$d = v\times t$

$= 27 \times 10.54 = 284.58 m$

c. from the kinematic formula

v = u + at

$v = 0 + 2.79\times 10.57$

v = 29.4066 m/a

d. $v = \sqrt { 27^2 + 29.406^2}$

v = 39.92 m/s

4 0

2 years ago

Read 2 more answers

1. The directional movement of ions by facilitated diffusion through protein channels is determined by

Andrei [34K]

Answer:

The electrochemical gradient of the ion that is being transported.

Explanation:

Facilitated diffusion through protein is defined as a form of facilitated transport whereby passive movement of ions along concentration gradients are guided by the presence of other ions.

Thus, the electrochemical gradient of the ion being transported is what facilitates it

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2 years ago

PtichkaEL [24]

Answer: The mass of ball is 10 grams.

Explanation:

Given : Kinetic energy = 4.5 J

Velocity = 30 m/s

The formula for Kinetic energy is as follows.

$K.E = \frac{1}{2}mv^{2}$

where,

K.E = Kinetic energy

m = mass

v = velocity

Substitute the values into above formula as follows.

$K.E = \frac{1}{2}mv^{2}\\4.5 J = \frac{1}{2} \times m \times (30 m/s)^{2}\\m = \frac{4.5 J \times 2}{900 m^2/s^2} (1 Js^{2} = kg m^{2})\\= 0.01 kg (1 kg = 1000 g)\\= 10 g$

Thus, we can conclude that the mass of ball is 10 grams.

3 0

2 years ago