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denpristay [2]
3 years ago
8

What statements best define percent error? Check all that apply. It is a mathematical way of showing accuracy.The higher the per

cent error, the more accurate the data set.The higher the percent error, the less accurate the data set.Only the experimental value is needed to calculate percent error.Only the actual, or accepted, value is needed to calculate percent error.A percent error always has a positive value.
Physics
2 answers:
Anni [7]3 years ago
6 0
Percent error is a way to present or show accuracy of a data set mathematically. Also, having a higher value of such would mean that there is low accuracy of the data points. It is calculated using the actual value and the theoretical value. Lastly, it will always have a positive value.
Taya2010 [7]3 years ago
3 0

Answer: It is a mathematical way of showing accuracy.The higher the percent error, the less accurate the data set.

Explanation:

Percent error is the difference between the experimental value and theoretical value and measures the accuracy of the result found. The larger the error, lesser is the accuracy and vice versa.

{\text {percent error}=\frac{|\text {Accepted value- Experimental value}|}{\text {accepted value}}

The experimental value can be greater or smaller than accepted value thus percent error can be positive as well as negative. But we only consider the value without the sign.


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The work done by the electric force to move a 1 c charge from a to b is

<em>(the voltage at 'b' compared to 'a') volts .</em>

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That's because "volt" means "Joule per Coulomb" .

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If the mass of the ladder is 12.0 kgkg, the mass of the painter is 55.0 kgkg, and the ladder begins to slip at its base when her
Marysya12 [62]

Answer:

 μ = 0.336

Explanation:

We will work on this exercise with the expressions of transactional and rotational equilibrium.

Let's start with rotational balance, for this we set a reference system at the top of the ladder, where it touches the wall and we will assign as positive the anti-clockwise direction of rotation

          fr L sin θ - W L / 2 cos θ - W_painter 0.3 L cos θ  = 0

          fr sin θ  - cos θ  (W / 2 + 0,3 W_painter) = 0

          fr = cotan θ  (W / 2 + 0,3 W_painter)

Now let's write the equilibrium translation equation

     

X axis

        F1 - fr = 0

        F1 = fr

the friction force has the expression

       fr = μ N

Y Axis

       N - W - W_painter = 0

       N = W + W_painter

       

we substitute

      fr = μ (W + W_painter)

we substitute in the endowment equilibrium equation

     μ (W + W_painter) = cotan θ  (W / 2 + 0,3 W_painter)

      μ = cotan θ (W / 2 + 0,3 W_painter) / (W + W_painter)

we substitute the values ​​they give

      μ = cotan θ  (12/2 + 0.3 55) / (12 + 55)

      μ = cotan θ  (22.5 / 67)

      μ = cotan tea (0.336)

To finish the problem, we must indicate the angle of the staircase or catcher data to find the angle, if we assume that the angle is tea = 45

       cotan 45 = 1 / tan 45 = 1

the result is

    μ = 0.336

5 0
4 years ago
Liquid helium has a temperature of 4k what is the temperature on celsius and fahrenheit
lesya692 [45]

Answer:

Explanation:

4K

°C = K - 273

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= -455.4 °F

8 0
3 years ago
A mole is defined as the number of atoms in an exact mass of which isotope?
alisha [4.7K]

Answer:

Isotope of carbon-12.

Explanation:

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So, The mole is the Notation  used for an amount 6.022\times 10^{23}  as same the 12 number is used for dozen for making count of Bananas and many more.

The 6.022\times 10^{23} is known as the fundamental constant names Avogadro's number (N_{A}), It is in the honor of Italian scientist Amedeo Avogadro.

7 0
3 years ago
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