1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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
You might be interested in
There are large spaces between gas molecules due to their weak
Eddi Din [679]

Answer:

true

Explanation:

8 0
3 years ago
29. All synthetic elements are...
lara31 [8.8K]

Answer:

D

Explanation:

pretty sure it is D. useful in making plastics

6 0
3 years ago
Which soil layer is the least similar to the underlying rock
aliina [53]
It would be the top soil. The most dissimilar layer is the uppermost layer.
8 0
3 years ago
Read 2 more answers
A sample of TNT, C7H5N3O6 , has 8.94 × 1021 nitrogen atoms. How many hydrogen atoms are there in this sample of TNT?
Bess [88]

Answer:

1.49×10²² atoms of H are contained in the sample

Explanation:

TNT → C₇H₅N₃O₆

1 mol of this has 7 moles of C, 5 moles of H, 3 moles of N and 6 moles of O

Let's determine the mass of TNT.

Molar mass is = 227 g/mol

As 1 mol has (6.02×10²³) NA atoms, how many moles are 8.94×10²¹ atoms.

8.94×10²¹ atoms / NA = 0.0148 moles

So this would be the rule of three to determine the mass of TNT

3 moles of N are in 227 g of compound

0.0148 moles of N are contained in (0.0148 .227) / 3 = 1.12 g

Now we can work with the hydrogen.

227 grams of TNT contain 5 moles of H

1.12 grams of TNT would contain (1.12 .5) / 227 = 0.0247 moles

Finally let's convert this moles to atoms:

0.0247 mol . 6.02×10²³ atoms / 1 mol = 1.49×10²² atoms

8 0
3 years ago
Please Help 8-9!!!!!!!
seropon [69]

The labeled diagram is given in the image attached.

As it can be seen from the image that freezing is when energy is removed from the system at 0 ⁰ while melting is when energy is added at 0⁰.

Also when energy is added at 100⁰C, it causes boiling while when it is removed at 100⁰C, it causes condensation.


Melting point of water is 0⁰C while boiling point is 100⁰C

3 0
3 years ago
Other questions:
  • 3 point different between fundamental units and derived units<br>​
    13·2 answers
  • The smallest unit that can exist as an element and still have the properties of that element is a(n):
    8·2 answers
  • Help me out anybody plz
    10·2 answers
  • Calculate the pH of a buffer that is 0.020 M HF and 0.040 M NaF. The Ka for HF is 3.5 × 10-4.
    8·2 answers
  • What parts do all cells have?
    6·2 answers
  • HELP ME!!!!
    7·1 answer
  • Magneisum and Bromine formation
    11·1 answer
  • Why are fingertips wet with saliva before counting money?​
    11·1 answer
  • Water temperature is a factor that can affect hypoxic
    14·1 answer
  • 2-ButeneHC = HCH₃) is a starting material in the manufacture of lubricating oils and many other compounds. Draw two different st
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!