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
Troyanec [42]
3 years ago
8

A 100.0 lb skier moves at 40.00miles/hour. Calc her kinetic energy.

Chemistry
1 answer:
Pepsi [2]3 years ago
5 0

answer: its 7290 joules.

explanations: the first procedure is to convert 1 pound to kilogram. 1 kg = 2.205 hence given 100 lb so we cross multiply. 1 kg * 100 = 2.205 * x

hence x= 45 kg. let's convert 1 mile per hour = 0.45 metre per second we cross multiply by 40 mile per hour. x= 40 * 0.45= 18 m/s.

KE= 1/2 * 45 * (18)^2

= 1/2 * 45 * 14580

= 7290joules

You might be interested in
what kind of generalization can you make about how the number of protons and neutrons are related to each other in the elements
AURORKA [14]
... to be called elements<span>. This lesson shows </span>you how to<span> predict the </span>numbers<span> of </span>neutrons, electrons, andprotons<span> of the isotopes they are likely to find in nature. (</span><span>cont.) ... What </span>kind<span> of </span>generalization can you make<span> about how the </span>number<span> of </span>protons<span> and </span>neutrons<span> are </span>related<span> to </span>each other<span> in the </span>elements<span>? Unit 1 • Investigation IV</span>
4 0
3 years ago
A buffer is prepared by adding 12.0g of ammonium chloride (NH4Cl) to 250mL of 1.00 M NH3 solution?The pH is 9.3 Write the net io
solniwko [45]

Answer:- NH_3(aq)+H^+(aq)\rightleftharpoons NH_4^+(aq)

Explanations:- The solution we have is a buffer solution and we know that a buffer solution resists a change in its pH if a strong acid or base is added to it.

Here, the buffer solution we have is of a weak base and it's conjugate acid. So, a strong acid(nitric acid) is added to this buffer then it reacts with the base present in the buffer so that the acid could be neutralized. This is called buffer action.

The net ionic equation is written as:

NH_3(aq)+H^+(aq)\rightleftharpoons NH_4^+(aq)

Note that HNO_3 is a strong acid and nitrate ion is the spectator ion so it is not included in the net ionic equation.

8 0
2 years ago
Which of the following molecules are considered inorganic?
Oksi-84 [34.3K]
The answer is D water
7 0
2 years ago
Read 2 more answers
The Law of Superposition states
lora16 [44]
In an undisturbed sequence of layers of rocks, the younger layers lie on top of the older layers
8 0
3 years ago
which statement best describes a mole? it is 12 units of a given substance. it contains 6.02 1023 grams of sodium chloride. it i
Digiron [165]

Answer:

The correct option is;

It contains 6.02 × 10²³ particles of a given substance

Explanation:

A mole of substance is the standard scientific unit of measurement for the quantity of the substance which is made up of a large number of small particles such as molecules, ions, atoms, electrons or other entities.

The General Conference on Weights and Measures defines the mole as the amount of a substance that contains 6.02214076 × 10²³ units of entities

The number 6.02214076 × 10²³, is also known as Avogadro's number.

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which scientist performed the cathode ray experiment leading to the discovery of electrons?
    9·1 answer
  • Which of the following elements are characterized by having full outermost s and p
    15·1 answer
  • Josh wants to sell a type of drink that has many layers to attract customers.Create a drink and explain the methods to produce t
    10·1 answer
  • Which best describes a role of animal in the water cycle
    12·2 answers
  • Please help me with this and explain! Thank you so much. Best answer gets Brainliest &lt;3
    13·1 answer
  • In an effort to try winning World War I, many countries broke previously created treaties and pacts that banned the use of chemi
    15·1 answer
  • Heeelllllllllllllpppppppppp
    13·1 answer
  • I need the definition of metallic bonds I can not find the exact definition. Please help 20 points and Briainest
    10·1 answer
  • 7.01*10^23 sulfur atoms is equal to______mol<br> Help please
    6·1 answer
  • Thermal decomposition of magnesium nitrate and magnesium hydroxide <br><br>​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!