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3 years ago

Which is the process by which a gas changes to a solid? deposition evaporation freezing sublimation

Physics

2 answers:

Nesterboy [21]3 years ago

7 0

Answer:

deposition

Explanation:

tino4ka555 [31]3 years ago

6 0

Answer:

Deposition

Explanation:

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What type of solution is seltzer water?

Masteriza [31]

Answer: Gas-liquid

Explanation:

Seltzer water is also called “sparkling water” or “carbonated water,” and it refers to the water which has been infused with carbon dioxide gas, which then causes it to bubble.

The type of solution that seltzer water is "gas liquid". Here, the solution is liquid while the solute is gas.

5 0

3 years ago

A toy friction car is propelled forward from rest by a girl's hand which causes it to reach a forward velocity of 3.5m/s in 0.4

alisha [4.7K]

Answer:

a) Acceleration = $8.75m/s^2$

b) Slow down acceleration = 0.625 $m/s^2$

c) Car travels 9.8 m

Explanation:

Acceleration = Change in velocity/Time

a) Change in velocity = 3.5-0 = 3.5 m/s

Time = 0.4 seconds

Acceleration = $3.5/0.4=8.75m/s^2$

b) Change in velocity = 0 - 3.5 = -3.5 m/s

Time = 5.6 seconds

Acceleration = $-3.5/5.6=-0.625m/s^2$

Slow down acceleration = 0.625 $m/s^2$

c) We have equation of motion, $v^2=u^2+2as$ , where u is the initial velocity, u is the final velocity, s is the displacement and a is the acceleration.

Here v = 0 m/s, u = 3.5 m/s, a = -0.625 $m/s^2$

Substituting

$0^2=3.5^2-2*0.625*s\\ \\ s=9.8m$

So, car travels 9.8 m

6 0

3 years ago

Easy Plz Help<br> Physics

Serhud [2]

Answer:

is it conduction because in that case it would be

Explanation:

the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.

4 0

4 years ago

An escalator carries you from one level to the next in an airport terminal. The upper level is 4.4m above the lower level, and t

STALIN [3.7K]

Answer:

Part A W= 2772J

Part B = -2.772J

Explanation:

Work = force × distance

Part A when you move from lower to upper level

= mgh

= 63× 4.4×10

=2772J

=2.772KJ

Part B

When you move from upper to lower

The acceleration due to gravity becomes negative -10m/s^2

Therefore Work =-2772KJ

Work = -2.772KJ

8 0

3 years ago

An electron having 500ev energy enters at right angle to a uniform magnetic field of 10^-4 Tesla. If its specific charge is 1.75

gtnhenbr [62]

Answer:

The correct answer might be $r = 2.8^{27}$ meters.

Explanation:

<u>The Answer Given might not be correct, I just did what my brain said.</u>

As the angle is perpendicular so Θ=90.

Putting this in the equation to calculate the magnetic force as:

F = evBsinΘ

F= evBsin90 *sin90 = 1 so,

F= evB.

Now when the electron will start to move in a circle, The necessary force that makes the electron rotate in a circle is given by Centripetal force.

So,

Magneteic Force = Centripetal Force

evB = $\frac{mv^{2} }{r}$

r = $\frac{mv}{Be}$ ......(1)

Now the problem is, We don't know " v " so we need to calculate velocity first,

Calculation of Velocity:

In order to calculate the velocity of electron, We should know the potiential difference with which the electrons are accelerated which in our case is 500ev. If "V" is the potiential difference, the energy gained by electrons during accelreation will be Ve. This appear as kinectic enrgy of electrons as,

K.E = Ve

$\frac{1}{2}$ m $v^{2}$ = Ve