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3 years ago

9

A physical reaction is a process in which one or more reactants change into one or more products with different properties. true

or false

1 answer:

Viefleur [7K]3 years ago

6 0

False, a physical reaction is a reaction that does not change the make up of an object.

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Two resistors A and B are arranged in series in one branch of a parallel arrangement. The other branch contains a single resisto

Ganezh [65]

Answer:

Explanation:

A and B are in series , Total resistance = Ra + Rb

This resistance is in parallel with single resistor C

Equivalent resistance Re = Rc x ( Ra + Rb ) / [Rc + ( Ra + Rb )]

Now this combination is in series in single resistance D .

Total resistance = Rd + Re

= Rd + { Rc x ( Ra + Rb ) / [Rc + ( Ra + Rb )] }

5 0

3 years ago

which best describes the big bang theory ? A. matter was compressed into a single point and then exploded outward to form the un

Furkat [3]

Answer:

A. matter was compressed into a single point and then exploded outward to form the universe

Explanation:

The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now (and it could still be stretching).

6 0

4 years ago

When a lens refracts different wavelengths at different angles, causing the light in the lens that passes through the edges to b

kondaur [170]

The technical name was kinda given in the question, and I'm guessing that's what they want: Dispersion. It refers to the phenomenon of different frequencies traveling at different speeds through a medium. This is due to the fact that the relative electric permittivity is a complex quantity that is a function of frequency. The relative electric permittivity, $\epsilon_{r}$ , is related to the speed of the wave in the medium by the relation:
$c' = \frac{c}{ \sqrt{ \epsilon_{r} } }$
Since this speed is a function of permittivity, and permittivity is a function of frequency, speed is a function of frequency.
Probably more info than you needed....

5 0

4 years ago

I provided the question above.

VikaD [51]

Answer:

Explanation:

since it is connected in parallel combination

use this formula

$\frac{1}{R} = \frac{1}{R1} + \frac{1}{R2}$

$\frac{1}{R} = \frac{1}{2} + \frac{1}{4}$

$\frac{1}{R} = \frac{4+2}{2}$

$\frac{1}{R} = \frac{6}{2}$

$\frac{1}{R} = 3$ ohm

therefore resistence = 3 ohm

then we should find power

P = VI

P = 12*3

P = 24 watt

now to find current use formula power = current * voltage

24 = current * 12

24/12 = current

2 = current

therefore current is 2 ampere (A).

to find potential difference (emf) use formula

V = IR

V = current * resistence

V = 2 * 3

V = 6 volt .

therefore potential difference is 6 volt.

6 0

3 years ago

Chuyển động thẳng đều là gì?<br><br> Lời giải:

dlinn [17]

Answer:

very easy question like its exam

8 0

3 years ago