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
Archy [21]
2 years ago
13

If the roller coaster car in the above problem were moving with twice the speed (4m/s), then what would be its

Chemistry
1 answer:
OleMash [197]2 years ago
3 0

Explanation:

New kinetic energy= ½mv'²

v' =4m/s

m= 2000kg

KE = ½ (2000) (4)²

=16000 Joules

You might be interested in
Why do you think there are different stars in each nighttime section of the artifact?
chubhunter [2.5K]

Answer:

The sky looks different in each nighttime section of the artifact because the artifact sections represent different seasons. ... Different constellations are visible on different nights throughout the year because of the earth's orbit. The Earth orbits around the sun. A full orbit is 365 days or one year.

Explanation:

7 0
3 years ago
Plz help!! I really really need the help as soon as possible thank pls!! Your help matters to me pls help it’s due tomorrow morn
Assoli18 [71]

Answer:

6.Given,

Final Velocity =60m/s

Initial Velocity= 0

Time=10 sec

A=?

A=Final Velocity- Initial Velocity/time

=60-0/10

=60/10

=6m/s ans.

Explanation:

Acceleration = Final Velocity - Initial Velocity/Time

By using this Formula we can calculate Acceleration.

5 0
3 years ago
You are going to standardize your sodium hydroxide by titrating with potassium hydrogen phthalate. As an example, you dissolve 0
Kay [80]

Answer:

0.13 M

Explanation:

The reaction equation is;

NaOH(aq) + KHC8H4O4(aq) ------> KNaC8H4O4(aq) + H2O(l)

Molar mass of KHP = 204.22 g/mol

Amount of KHP= mass/ molar mass = 0.3365 g/204.22 g/mol = 1.65 × 10^-3 moles

n= CV

Where;

C= concentration

V= volume in dm^3

n= number of moles

C= n/V = 1.65 × 10^-3 moles × 1000/250 = 6.6 × 10^-3 M

If 1 mole of KHP reacts with 1 mole of NaOH

1.65 × 10^-3 moles of KHP will react with 1.65 × 10^-3 moles of NaOH

From

n= CV

We have that only 12.44 ml of NaOH reacted

C= n/V = 1.65 × 10^-3 moles × 1000/12.44

C= 0.13 M

At the equivalence point, the KHP solution turned light pink.

4 0
3 years ago
Suppose you wanted to cause Pb2+ ions to come out of solution as solid Pb. Which metal(s) could you use to accomplish this? Au Z
lions [1.4K]

Answer:

Ca, Zn, Ni, Al, Fe

Explanation:

The activity series is an arrangement of metals in order of decreasing reactivity.

Metals that are high up in the activity series are very reactive. They displace metals that are lower in the activity series from an aqueous solution of their salts.

The metals; Ca, Zn, Ni, Al, Fe are all above Pb in the activity series hence they will cause Pb2+ ions to come out of solution as solid Pb.

5 0
2 years ago
to a concentrated buffer of ph 9.0 was added an equal volume of an aqueous solution that was 0.20 m in each of the ions ca2 , cd
jenyasd209 [6]

Aqueous Solution - The expected precipitate would consist of Cu(OH)2.

What is aqueous solution?

An aqueous solution is one in which water serves as the solvent. Chemical equations typically illustrate it by adding (aq) to the appropriate chemical formula. For instance, Na+(aq) + Cl would be used to represent a solution of table salt, as well as sodium chloride (NaCl), throughout water (aq). The word aqueous, which derives from the word aqua, means that it is dissolved in or related to water. Water is a common solvent in chemistry due to its superior solvent properties and natural abundance. Since water is frequently used as a solvent in experiments, unless the solvent is specified, the word "solution" refers to an aqueous solution. A solution wherein the solvent is a liquid but not water is referred to as a non-aqueous solution.

Because:

salt:    copper(II) hydroxide
Ksp:    1.8 × 10-19

To learn more about aqueous solution from the given link:
brainly.com/question/19587902
#SPJ4

8 0
10 months ago
Other questions:
  • What is 5.2034 x 10^8 in standard format
    10·2 answers
  • Which combination(s) of alkyl bromide and carbonyl compound can be used to prepare the following product by reaction of the Grig
    9·1 answer
  • Under laboratory conditions of 25.0 degrees C and 99.5 kPa, what is the maximum number of liters of ammonia that could be produc
    11·1 answer
  • Calculate the mass of potassium sulphate required to prepare its 10% solution in 100g water.
    14·1 answer
  • I need this ASAP! Thank you!
    10·2 answers
  • The isotope of an unknown element, X, has a mass number of 79. The most stable ion of this isotope has 36 electrons and has a 22
    5·1 answer
  • What volume would 0.735 moles of O2 gas occupy at STP
    9·1 answer
  • Methane to acetylene?? ​
    10·1 answer
  • By what process do electromagnetic waves release from the materials they contact?
    5·1 answer
  • What are the oxidation numbers for groups 1-18 (skip groups 3-12)
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!