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3 years ago

8

Describing Changes of State

1 answer:

Vera_Pavlovna [14]3 years ago

8 0

Answer:

ok

Explanation:

Physical conditions like temperature and pressure affect state of matter. ... When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation).

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The quantity of charge passing through a surface of area 1.82 cm2 varies with time as q = q1 t 3 + q2 t + q3 , where q1 = 5.2 C/

Brrunno [24]

Answer:

Current through the surface at t = 1.1 s is 21.37 A.

Explanation:

The charge is passing through a surface of area varies with time as :

$q=q_1t^3+q_2t+q_3$

Here,

$q_1=5.2\ C/s^3\\\\q_2=2.5\ C/s\\\\q_3=6.5\ C$

t is in seconds

$q=5.2t^3+2.5t+6.5$

The rate of change of electric charge is called electric current. It is given by :

$I=\dfrac{dq}{dt}\\\\I=\dfrac{d(5.2t^3+2.5t+6.5)}{dt}\\\\I=15.6t^2+2.5$

At t = 1.1 s, Current,

$I=15.6(1.1)^2+2.5\\\\I=21.37\ A$

So, the instantaneous current through the surface at t = 1.1 s is 21.37 A.

3 0

3 years ago

A puppy is running with a speed of 11.2 m/s towards it owner when it

Levart [38]

Answer:

-5.6m/s²

Explanation:

Given parameters:

Initial speed = 11.2m/s

Time of running = 2s

Unknown:

Acceleration of the puppy = ?

Solution:

Acceleration is the rate of change of velocity with time.

So;

Acceleration = $\frac{Final speed - initial speed }{time}$

final speed = 0m/s

Acceleration = $\frac{0 - 11.2}{2}$ = -5.6m/s²

8 0

2 years ago

What is the magnitude of the total displacement of the school bus.

Evgesh-ka [11]

Answer:

400 or 500

Explanation:

6 0

2 years ago

In the problem 10 − 4 = 6, what's the correct term for the number 4?

romanna [79]

10 is the number that is subtracted from it is the MINUEND

4 is the number being subtracted its then the SUBTRAHEND

6 is the result it is then the DIFFERENCE

so the correct term for 4 is SUBTRAHEND

3 0

3 years ago

Matilda has a 100 g rock sample. She knows that the rock contains uranium-238 and that the half-life of uranium-238 is 4.5 X 109

garik1379 [7]

The half life period of the rock sample remains unchanged.. it will always be 4.5*10^9 yrs doesn't matter how many times you cut it

3 0

3 years ago

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