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3 years ago

A scientist is designing a device that will mimic Earth's atmosphere by

Physics

1 answer:

mafiozo [28]3 years ago

8 0

Answer:

1. Ultraviolet light (UV)

2. X-rays

3. Gamma-rays

Explanation:

Though there are different types of energy or electromagnetic waves with varying wavelengths, including the likes of Gamma X-rays, ultraviolet light, visible light, infrared radiation, and microwave radiation.

What is more certain is that the atmosphere blocked the high-energy waves from getting to the earth surface or biosphere such as Ultraviolet light (UV), X-rays and Gamma-rays

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We cannot consider something to be work unless

Alla [95]

We cannot consider something to be work unless force applied causes movement of an object in the same direction as the applied force.

4 0

4 years ago

Read 2 more answers

A certain electric dipole consists of charges q and –q separated by distance d, oriented along the x-axis as shown in the figure

Anna71 [15]

Electric field due to a point charge is given by formula

$E = \frac{kq}{r^2 + \frac{d^2}{4}}$

now due to negative charge also the magnitude of electric field will be same

only difference is the direction of field due to negative charge is radially inwards

now we can say that net field due to these two charges is given as

$E = 2E_0cos\theta$

$E = 2\frac{kq}{r^2 + \frac{d^2}{4}}*\frac{d/2}{\sqrt{r^2 + \frac{d^2}{4}}}$

$E = \frac{kqd}{(r^2 + \frac{d^2}{4})^1.5}$

now it is given that distance r is very large than "d" so we can say

$E = \frac{kqd}{r^3}$

so above is the electric field due to dipole

7 0

3 years ago

Your friend has slipped and fallen. To help her up, you pull with a force F, as the drawing shows. The vertical component of thi

sineoko [7]

This question can be solved using the concept of the composition of the vector.

(a) The magnitude of F is b "164.27 N".

(b) The angle of the vector from horizontal is " ".

(a)

From the composition of the rectangular components of a vector, we know that the magnitude of the resultant vector is given by the following formula:

$F = \sqrt{F_x^2+F_y^2}$

where,

$F_x$ = x-component of the force = 122 N

$F_y$ = y-component of the force = 110 N

Therefore,

$F = \sqrt{(122\ N)^2+(110\ N)^2}$

F = 164.27 N

(b)

The angle of the vector is given by the following formula:

$\theta = tan^{-1}(\frac{F_y}{F_x})\\\\\theta = tan^{-1}(\frac{110\ N}{122\ N})\\\\$

θ = 42.04°

Learn more about the composition of vector here:

brainly.com/question/24313520?referrer=searchResults

3 0

3 years ago

Which of the following systems acquisition methods requires staff to systematically go through every step in the development pro

Pani-rosa [81]

Answer:

a.Systems development life cycle

Explanation:

Of all the options the correct answer is a.Systems development life cycle.

Systems development life cycle: The life cycle phases of systems development include preparation, system assessment, system design, advancement, application, inclusion and testing, as well as maintenance and support.

So, we can see that the Systems development life cycle enables staff to systematically go through every step in the development process and has a lower probability of missing important user requirements.

7 0

3 years ago

A gas is placed inside a very cold box. The gas molecules transfer heat to the walls of the box. Which best describes what happe

STatiana [176]

Answer:

the gas molecules slow down, and some change phase to liquid.

Explanation:

1) The heat always travels from the warmer substance to the coleer substace.

That is why it is correctly indicated that the gas molecules transfer heat to the walls of the box.

2) As this happens, means that the gas molecules lose heat energy and is cooled.

3) KInetic energy is directly related with the temperature: therefore, the lower the temperature the lower the kinetic energy.

4) Kinetic energy is, also, directly related to the square of the speed. So, the lower the kinetic energy, the lower the average speed of the molecules.

That is why it is correct to say that the gas molecules slow down.

5) Since it is said that the walls of the box are very cold, it may well happen that the energy passed from the molecules to the walls of the box is enough to produce the phase change, from gas to liquid.

As for the other options:

i) the gas molecules speed up due to collisions with the walls: No. As already stated the gas molecules slow down.

ii) the gas molecules vibrate around fixed positions: No, the gas molecules are not around fixed positions, they translate in right random motion.

iii) the gas molecules gain energy from the cold walls of the box: as already stated the gas molecules release energy which is transfered to the cold walls of the box.

8 0

3 years ago