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olga nikolaevna [1]
3 years ago
5

Tool

Physics
1 answer:
Ede4ka [16]3 years ago
3 0

Answer:

9758 how many significant figures

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You take a lab battery and, when it isn't connected to a circuit, you measure a voltage of 4.00-V with a voltmeter. You then con
max2010maxim [7]

Answer:

r = 28.6 ohm

Explanation:

As we know that when battery is in open circuit then the potential difference of the cell is known as EMF

so EMF is given as

EMF = 4.00 V

now when the battery is connected across a resistance of 200 ohm then there is current flowing through the battery

it is given as

i = \frac{V}{R + r}

17.5 \times 10^{-3} = \frac{4}{200 + r}

200 + r = 228.6

r = 28.6 ohm

6 0
4 years ago
HELP IM TIMED. ILL MARK BRAINLIEST PLSSSSSS.
Alex17521 [72]

Answer:

According to Newton's Second Law of Motion :    

Where,

F = Force Applied

m = Mass of the object

a = Acceleration

Now, we will use this law to solve this question.

Given :

Acceleration or a = 15.3 m/s²

Force = 44 N

Mass = ?

Substitute, the given values in the formula.

F = ma

⇒ m = F/a

   m = 44/15.3

<u>m = 2.9 kg</u>

5 0
3 years ago
What is cos-^1(0.34)?<br> A. 19.9<br> B. 44.2°<br> C. 70.1°<br> D. 18.8°
Fudgin [204]
A calculator must be used. To put your calculator in degree mode, press the MODE button and select degree, the press the 2nd button then MODE again. For most TI calculators, press the 2nd button then press the cos button then enter the value 0.34. This will give you an answer of 70.123 (when you round to 3 decimal places).

The answer is C
3 0
3 years ago
What is science and physics?<br>yeha avo.​
Dafna1 [17]

Answer:

Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence. Scientific methodology includes the following: Objective observation: Measurement and data (possibly although not necessarily using mathematics as a tool)

Explanation:

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<em>HAVE</em><em> </em><em>A</em><em> </em><em>NICE</em><em> </em><em>DAY</em><em> </em><em>:)</em><em> </em>

<em>IT'S</em><em> </em><em>SRESHTHA77</em><em> </em>

<em>GORGEOUS</em><em> </em><em>DIDI</em><em> </em>

8 0
3 years ago
When energy changes form, energy is...<br><br>A) lost.<br>B) created.<br>C) not lost or created.
devlian [24]

Answer:

C

Explanation:

Energy is neither created or destroyed, but it can change forms...

6 0
3 years ago
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