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netineya [11]
3 years ago
8

Measure the length of the line within the amount of uncertainty allowed. (Note: You may need to convert centimeters to millimete

rs in your response.)

Chemistry
2 answers:
grigory [225]3 years ago
8 0
A. 3.6 cm
B.22.0 mm
C.1.25cm
D.7 mm
Makovka662 [10]3 years ago
7 0

Answer: Length for line A  = 36mm

Length for line B = 22mm

Length for line C = 12.5mm

Length for line D = 7mm

Explanation: To measure the length on the scale, the distance between the front edge that is the blue line and the last edge that is the dotted line for each letter is calculated.

The major division for this scale is 1 cm and minor division for this scale is 0.1 cm.

Conversion factor: 1 cm = 10 mm

  • Distance from the front line to the dotted line of A is 3.6cm which makes it as 36mm.
  • Distance from the front line to the dotted line of B is 2.2cm which makes it as 22mm.
  • Distance from the front line to the dotted line of C is 1.25cm which makes it as 12.5mm.
  • Distance from the front line to the dotted line of D is 0.7cm which makes it as 7mm.

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nata0808 [166]

Answer:

Frecuency = 5,83x10⁻⁷ Hz

Explanation:

The equation that connects wavelenght and frequency is given by:

λ = c/ν

λ=wavelenght (expressed in lenght´s units)

c= speed of light (3x10⁸ m/sec)

ν=frequency (expressed in units of time⁻¹ or Herzt)

In our case, λ=5,14x10⁻⁷ m , so replacing in our previous formula, this gives us the final result of ν (frequency for green light) of 5,83x10¹⁴ Hz (or Herzt)

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3 years ago
Which salt is produced when NH4OH Reacts with HNO3
borishaifa [10]

Explanation:

When an acid reacts with a base then it results in the formation of salt and water.

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The reaction is as follows.

 NH_{4}OH + HNO_{3} \rightarrow NH_{4}NO_{3} + H_{2}O

Hence, there will be formation of ammonium nitrate (NH_{4}NO_{3}) salt.


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3 years ago
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alina1380 [7]

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A scientist observes that the electrical resistance of a superconducting material drops to zero when the material is cooled to v
k0ka [10]

Answer:

The scientist is observing an intensive property of a superconductor.

Explanation:

An intensive property is a bulk property of matter. This means that an intensive property does not depend on the amount of substance present in the material under study. Typical examples of intensive properties include; conductivity, resistivity, density, hardness, etc.

An extensive property is a property that depends on the amount of substance present in a sample. Extensive properties depend on the quantity of matter present in the sample under study. Examples of extensive properties include, mass and volume.

Resistance of a superconducting material has nothing to do with the amount of the material present hence it is an intensive property of the superconductor.

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