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
ehidna [41]
3 years ago
8

1. A train travels North at 103 km/h. Is this an example of speed, velocity, or acceleration. speed velocity accelleration​

Chemistry
2 answers:
Luba_88 [7]3 years ago
8 0

Answer:

speed

Explanation:

Speed is the rate at which something covers distance. Velocity is the rate of change of its position, ex: 70km/h to north. Acceleration is the rate at which an object changes its velocity.

irina1246 [14]3 years ago
3 0

Answer:

velocity

Explanation:

velocity has both speed AND direction.

You might be interested in
When might a large volume of material have little mass
Natali5045456 [20]
A large volume of material will have a small amount of mass when the material in question is gaseous or porous, and therefore has a lot of space within it despite taking up a large amount of space overall.
4 0
3 years ago
In guinea pigs, black fur is the dominant trait. If a white guinea pig mates with a guinea pig that is heterozygous for its blac
Anon25 [30]
The answer is C, since the black pig is heterozygous, it makes the majority black due to its dominant trait, but about 1 in 5 will be white
5 0
3 years ago
The raw water supply for a community contains 18 mg/L total particulate matter. It is to be treated by addition of 60 mg alum (A
s344n2d4d5 [400]

Solution :

Given :

The steady state flow = 8000 $ m^3 /d $

                                    $= 80 \times 10^5 \ I/d $

The concentration of the particulate matter = 18 mg/L

Therefore, the total quantity of a particulate matter in fluid $= 80 \times 10^5 \ I/d \times 18 \ mg/L $

$= 144 \times 10^6 \ mg/g$

$= 144 \ kg/d $

If 60 mg of alum $ [Al_2(SO_4)_3.14 H_2O] $ required for one litre of the water treatment.

So Alum required for  $ 80 \times 10^5 \ I/d $

$= 80 \times 15^5 \ I/d  \times 60 \ mg \ alum /L$

$= 480 \times 10^6 \ mg/d $

or 480 kg/d

Therefore the alum required is 480 kg/d

1 mg of the alum gives 0.234 mg alum precipitation, so 60 mg of alum will give $ = 60 \times 0.234 \text{ of alum ppt. per litre} $

      $= 14.04 $ mg of alum ppt. per litre

480 kg of alum will give = 480 x 0.234 kg/d

                                        = 112.32 kg/d ppt of alum

Daily total solid load is  $= 144 \ kg/d + 112.32 \ kg/d$

                                       = 256.32 kg/d

So, the total concentration of the suspended solid after alum addition $= 18 \ mg/L + 60 \times 0.234 $

= 32.04 mg/L

Therefore total alum requirement = 480 kg/d

b). Initial pH = 7.4

 The dissociation reaction of aluminium hydroxide as follows :

$Al(OH)_3 \rightleftharpoons Al^{3+} + 3OH^{-} $

After addition, the aluminium hydroxide pH of water will increase due to increase in $ OH^- $ ions.

Therefore, the pH of water will be acceptable range after the addition of aluminium hydroxide.

c). The reaction of $CO_2$ and water as follows :

$CO_2 (g) + H_2O (l) \rightarrow H_2CO_3$

For the atmospheric pressure :

$p_{CO_2} = 3.5 \times 10^{-4} \ atm $

And the pH is reduced into the range of 5.9 to 6.4

6 0
2 years ago
23<br> How many moles are in 500g of Calcium Nitrate? 10 M
Harman [31]
500 grams Calcium Nitrate to mol= 3.04715
6 0
3 years ago
#9 *
klio [65]

Answer:

As pressure increases , volume decreased

As pressure decreases , volume increases

Explanation:

Boyle's law

8 0
2 years ago
Other questions:
  • What is the pH of a 0.100 M HI solution? Is that neutral, acidic, or basic? acidic What is the pOH of a 0.100 M HI solution? Is
    8·1 answer
  • Benzene and toluene form ideal solutions. Consider a solution of benzene and toluene prepared at 25∘C. As suming that the mole f
    13·2 answers
  • What weather types affect earthworms?
    12·1 answer
  • 12.Chlorine has 18 electrons. It is a(n)<br><br><br><br>cation<br><br>anion<br><br>atom<br><br><br>​
    11·1 answer
  • write the name of and molecular formula of compound which gives hydrogen ion and chloride ion in the solution state. in which co
    6·1 answer
  • State the purpose of Watson and crick DNA structure experiment
    15·1 answer
  • Name the compounds( Please answer only if you know)
    6·1 answer
  • PLEASE HELPPPP!!! IM BEING TIMED
    5·2 answers
  • Función que describe el movimiento armónico simple
    6·1 answer
  • What elements in a reaction is likely to react just like Zinc?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!