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klio [65]
3 years ago
11

A screw is a type of simple machine. If we look closely at a screw, we see that it is really a _________ wrapped around a centra

l core.
A) wedge
B) lever (B is incorrect)
C) fulcrum
D) inclined plane
Chemistry
2 answers:
krek1111 [17]3 years ago
5 0
I believe the answer in an inclined plane, because the ridge running along the sides run up the core. (Also, the other two answers are incorrect, so process of elimination)
fgiga [73]3 years ago
3 0
D. Inclined Plane I think but I'm not sure though
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Please help me if possible<br>​
Gwar [14]

Explanation:

RAM={mass number ×relative abundance (%) + mass number ×relative abundance (%)} ÷100%

so take (91.05×20) +(8.95×22)

5 0
2 years ago
Diseases can spread rapidly in cities. If a disease kills many people in a city but fewer in a rural area, this is an example of
Inga [223]

Answer:

Density independent factor

Explanation:

in dense areas where people livein  very close and tight spaces

5 0
3 years ago
The equilibrium expression for a reaction is `"K"_("eq") = ("[H"^+"]"^6)/("[Bi"^(2+)"]"^2["H"_2"S"]^3)` Which of the following c
Nata [24]

Option B is correct

K = Kp /Kr

The given equation indicating, the product containing 6 moles of proton whereas the reactant contains 2 mole of bismuth and 3 mole of hydrogen sulphide.

Hence, in reaction B there are 2 mole of bismuth and 3 mole of hydrogen sulphide reacting to produce 6 moles of proton. whereas the concentration of Bi2S3 is not considered as it is present in solid phase.

4 0
3 years ago
Read 2 more answers
you are given 500 mL of a 5M stock solution of ammonium chloride but for your experiment, you only need 100 mL of a 0.65M soluti
mafiozo [28]

Answer:

13ml

Explanation:

  1. to prepare dis solution first you need a volumetric flask of 100ml calibrated .
  2. using dilution formulae u will need 13ml from the stock
  3. measure 13ml of the 5M stock of the 500ml
  4. then drop it into the 100ml calibrated flask
  5. then add water till it reach d mark and you shake thoroughly
6 0
3 years ago
which one of the following is an endothermic process?1.ice melting 2.water freezing 3.a boiling soup 4.the reaction of HCl and N
Llana [10]
<span>From the above given choices :
 melting is an endothermic process</span>
8 0
3 years ago
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