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emmainna [20.7K]
2 years ago
10

The layers of the Earth are described by their composition but not their mechanical properties. True or false

Biology
1 answer:
Svet_ta [14]2 years ago
8 0

Answer:

False

Explanation:

The layers include mantle, crust, cores, lithosphere.

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Find the resistance of a portable lantern that uses a 24V power supply and draws a current of 0.80A. PLZ HURRY LOTS OF POINTS PH
ira [324]

Answer:

Resistance = 30 Ω

Explanation:

The resistance of an electric circuit = \frac{Voltage}{current}

voltage = 24V

current (I) = 0.80A

Therefore, R = \frac{24}{0.8}  = 30

R = 30 ohms

5 0
3 years ago
What is the most appropriate method to prepare a sample of cheek cells for PCR?
Dmitry [639]

Answer:

Extraction of genomic DNA

Explanation:

Resuspend the cells(any number), smaller numbers also work, in 10-20 ul of TE buffer or milli Q water. boil for 5-10 min in a waterbath, quick chill, short spin. use the supernatant as a template for PCR.

If cells are very less, u can directly add cells to the PCR reaction without enzyme,boil for 5-10 min in a waterbath, let it cool slowly, short spin. Add enzyme to the supernatant and start the reaction at extension step followed by normal PCR reaction steps.

5 0
3 years ago
An ion can be removed from an aqueous solution by 1. the formation of a gas that escapes. 2. formation of a precipitate. 3. the
Lena [83]
The correct option is ALL OF THESE.
Generally, three processes can lead to the removal of ions from solutions, these include;
1. The formation of an insoluble product, which is called precipitate.
2. The formation of either a non electrolyte or a weak electrolyte and 
3. The formation of a gas product, which escapes from the solution.
7 0
3 years ago
When the term biceps, triceps, or quadriceps forms part of a muscle's name, what does it tell you about the muscle? the muscle h
tekilochka [14]

Answer:

The muscle has two, three, or four origins, respectively.

Explanation

  • A muscle is an organ composed of muscle tissue that contract to facilitate a particular movement
  • biceps,triceps and quadriceps  are types of skeletal muscles since they use bones as levers
  • <em><u>They differ in that; the biceps have two origins, triceps have three origins and quadriceps have four origin.</u></em>
  • <em><u>Bicep is a two headed muscle thus said to have two origins ,triceps have three muscle heads and therefore have three separate origin attachment point while quadriceps are made of four muscles heads hence have four origins. </u></em>
6 0
3 years ago
Which option is an example of a physical property?
wariber [46]
Rusting ability because it is something you can see
4 0
3 years ago
Read 2 more answers
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