If you make an electromagnet using a battery circuit and a steel nail, how can you increase its magnetic strength? A. replace the nail with a copper rod B. wrap more coils of wire around the nail C. use a longer nail D. remove the plastic insulation from the wire coil
Answers
Answer: The correct answer is "wrap more coils of wire around the nail".
Explanation:
Electromagnet: When the current passes through iron core wounded by the coils then it will get magnetized. It is not a permanent magnet.
It will loose its magnetism when the current does not flow in it.
The poles of the electromagnet can be changed. They are not fixed.
In the electromagnet, the strength of the magnetism can be increased or decreased by increasing the number of turns in the coil and by increasing the current.
In the given problem, If you make an electromagnet using a battery circuit and a steel nail, the magnetic strength can be increased by wrapping more coils of wire around the nails.
Therefore, the correct option is (B).
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Which type of bond will most likely be found in HBr?
Which contains more molecules: 1.00 mol H2O2, 1.00 mol C2H6, or 1.00 mol CO?
Determine the total number of moles of oxygen that react completely with 8.0 moles of C2H6.
Answers
The number of moles of O₂ will be 28 moles.
The given balanced reaction:
From the above reaction,
2 moles of C₂H₆ nd 7 moles of O₂ reacts together to produce 4 moles of CO₂ and 6 moles of H₂O.
Given:
Number of moles of C₂H₆ = 8
To find:
Number of moles of O₂=?
2 moles of C₂H₆ reacts with 7 moles of O₂.
1 mol of C₂H₆ = moles of O₂
8 moles of C₂H₆ = moles of O₂
Thus, number of moles of O₂ will be 28 moles.
Find more information about "Number of moles" here:
Answers
A phospholipid is composed of a polar, hydrophilic phosphate group 'head' and two hydrophobic (non-polar) fatty acid tails, where one tail is unsaturated (meaning it has a double bond between carbons, leading to a kinked shape).
Final answer:
Phospholipids are amphipathic molecules consisting of a hydrophilic (water-attracting) head group that contains a phosphate and is attached to a glycerol molecule and a hydrophobic (water-repelling) tail that contains two fatty acid chains. This structure permits different interactions based on charge and is crucial in forming biological membranes.
Explanation:
A phospholipid is an amphipathic molecule, or a molecule with both hydrophilic and hydrophobic components. This structure consists of a hydrophilic phosphatase-containing group (the head), and two hydrophobic fatty acid chains (the tails). The hydrophilic head group is typically made up of a phosphate group attached to a glycerol molecule. The hydrophobic tails are generally long hydrocarbon chains comprising of either saturated or unsaturated fatty acids.
This pattern allows for the dual-loving character of the phospholipid to interact differently with substances based on their charges and allows phospholipids to play a crucial role in the formation of biological membranes such as the plasma membrane.
Learn more about Phospholipid here:
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Answers
Answer:
Velocity is halved
Explanation:
Momentum is contingent on mass and velocity. The quantity of motion in a body is called the momentum of the body.
Momentum = mass x velocity
Now, if mass does not change and momentum is reduced by half, it suggests that the velocity was reduced by half.
Velocity is directly related to momentum.
b. 2H2CO3
c. CO2 2H2O
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CH₄ + 2 O₂ = CO₂ + 2 H₂O
type of reaction: Combustion
Answer A
hope this helps!
False
Answers
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Answer:
rocks are made out of minerals.
Explanation: