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
Ber [7]
4 years ago
8

A screw has 4 threads per centimeter and a circumference of 2 centimeters. The mechanical advantage of the screw is?

Chemistry
2 answers:
Anna71 [15]4 years ago
8 0

Answer:

Mechanical advantage = 8

Explanation:

It is given that,

A screw has 4 threads per centimeter.

The circumference of the screw, C = 2 cm = 0.02 m

The mechanical advantage of a screw is given by :

MA=\dfrac{circumference}{pitch}.............(1)

Pitch of a screw is defined as the number of threads per inch on the screw i.e.

Pitch = 1 / number of threads per inch or cm

or pitch = 1/4

MA=\dfrac{2}{1/4}

MA = 8

Hence, the mechanical advantage of the screw is 8.

sashaice [31]4 years ago
3 0
<span>The answer is 8. Hope this help!!!

</span>
You might be interested in
Which statement explains the relationship between evaportion
Dimas [21]
Is there answer choices ?
5 0
3 years ago
Someone answer this please...
boyakko [2]

Answer:

120 mol Mg

General Formulas and Concepts:

<u>Chemistry - Stoichiometry</u>

  • Using Dimensional Analysis

Explanation:

<u>Step 1: Define</u>

120 moles H₂

<u>Step 2: Identify Conversions</u>

RxN:   3 mol H₂ = 3 mol Mg

<u>Step 3: Stoichiometry</u>

<u />120 \ mol \ H_2(\frac{3 \ mol \ Mg}{3 \ mol \ H_2} ) = 120 mol Mg

7 0
3 years ago
Read 2 more answers
The specific heat of a certain type of metal is 0.128j/(g.c). What is the final temperature if 305.J of heat is added to 72.7g o
expeople1 [14]
E answer is -60.57 = -60.6 KJ.
CaC2(s) + 2 H2O(l) ---&gt; Ca(OH)2(s) +C2H2(g) H= -127.2 KJ
Hf C2H2 = 226.77
Hf Ca(OH)2 = -986.2
<span>Hf H2O = -285.83
Now,

</span><span>add them up. 226.77 - 986.2 + (2*285.83) = -187.77 
</span><span>Add back the total enthalpy that is given in the question
 -187.77+127.2 = -60.57 

</span>
3 0
3 years ago
In which species does nitrogen have an oxidation number of zero?
VARVARA [1.3K]
The most common species of nitrogen in which its oxidation state is zero is the diatomic nitrogen (N_{2}). This is because the oxidation number of pure elements (whether alone as an atom or combined with other atoms of the same element such as the diatomic nitrogen) is always zero. 

In addition to diatomic nitrogen, there are diazonium (R-N_{2}^{+}) compounds where nitrogen has an oxidation number of zero.
4 0
3 years ago
What is the molar mass of 4.23 g of an elemental gas in a 2.5L container at 282K and 1.4 atm?
balu736 [363]

Answer:

27.98g/mol

Explanation:

Using ideal gas law equation;

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

T = temperature (K)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

According to the information given:

V = 2.5L

P = 1.4 atm

T = 282K

n = ?

Using PV = nRT

n = PV/RT

n = 1.4 × 2.5/0.0821 × 282

n = 3.5/23.1522

n = 0.151mol

Using the formula to calculate molar mass of the elemental gas:

mole = mass/molar mass

Molar mass = mass/mole

Molar mass = 4.23g ÷ 0.151mol

Molar mass = 27.98g/mol

6 0
3 years ago
Other questions:
  • What is the specific heat for the aluminum wire?
    8·1 answer
  • Which of these observations helped Rutherford determine that atoms have tiny, dense, positively charged nuclei?
    8·1 answer
  • Classify the following as a type of potential energy or kinetic energy (use the letters K or P)
    15·2 answers
  • Two states of matter are described below. State X: Particles are ions that are far apart State Y: Particles are molecules that a
    5·1 answer
  • Describe one technology used to travel to space and one technology used to return from space
    7·1 answer
  • Which of the following is a characteristic of nonmetals?
    12·1 answer
  • A chemical reaction in which compounds break up into simpler constituents is a _______ reaction.
    10·2 answers
  • C) Ammonia is added to copper sulphate solution till excess?​
    14·1 answer
  • Lol whats the answer to the question tho lol
    6·1 answer
  • an object displaces 32 mL of water and a known density of 0.0625 g/mL. What is the mass of the object?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!