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Law Incorporation [45]
3 years ago
8

Explain these three questions and give answers please I don't get this at all I need help on these!!!

Physics
1 answer:
Greeley [361]3 years ago
8 0
3. All are hydrocarbons and all are in the eth- group i.e. all have two carbon atoms. Ethane is an alkane, ethene is an alkene and ethyne is an alkyne.
4. No C=C double bonds, only single C-C bonds. Saturated with hydrogen atoms (as many C-H bonds as possible).
5. As branching increases, boiling points decrease. (Molecules exert intermolecular forces of attraction between each other and these are stronger when they are closer together. Branching makes it harder for the hydrocarbon molecules to pack closely together therefore these forces are weaker and it takes lesser energy to break them.)
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What does mechanical wave mean?
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A wave that transfers energy through vibrating In a medium
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3 years ago
A jet transport has a weight of 1.87 x 10⁶ N and is at rest on the runway. The two rear wheels are 16.0 m behind the front wheel
qwelly [4]

Answer:

a)  R(fw)  = 46.75*10⁶ (N)

b)  R(rwi) = 70.125*10⁶ [N]

Explanation: See Attached file (the rectangle stands for a jet)

The diagram shows forces acting on the jet

Let R(fw)    Reaction of front wheels and

R(rw)   Reaction of rear wheels

Now we apply the Stevin relation, for R(fw)  and a jet weight as follows

R(fw)/ 4   =  187*10⁶ / 16

Then :

R(fw)  = ( 1/4) *187*10⁶           ⇒   R(fw)  = 46.75*10⁶ (N)

And e do the same for the reaction on rear wheels

R(rw) / 12  = 187*10⁶ /16   ⇒     R(rw) =(3/4)*187*10⁶

R(rw) = 140,25*10⁶ [N]

The last expression is for the whole reaction, and must be devide by 2

because that force is exerted for two wheels, therefore on each of the two rear wheels the reaction will be:

R(rwi) = 70.125*10⁶ [N]

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How do igneous rocks form??
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PLEASE ASAP ILL GIVE BRAINLIEST.
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A stop watch is used when a athlete runs why​
Galina-37 [17]

Answer:

so the exact time can be measured

Explanation:

if it is not used then let's say 2 athletes finish the race at the time 20 second so it won't be exact and you would not know who is first and if it is used then you even know how much or which part of the second it is, hope you understand . brainy plzz

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3 years ago
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