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dezoksy [38]
1 year ago
14

you are riding in a train that is traveling at a speed of 120km/h how long will it take to travel 950km

Chemistry
1 answer:
muminat1 year ago
4 0

The time take for the train to travel 950 Km is 7.92 h

<h3>What is speed? </h3>

Speed is the distance travelled per unit. Mathematically, it can be expressed as:

Speed = distance / time

With the above formula, we can determine the time. Details below:

<h3>How to determine the time</h3>

The time taken for the train t travel 950 Km can be obtained as follow:

  • Speed = 120 Km/h
  • Distance = 950 Km
  • Time =?

Speed = distance / time

120= 950 / time

Cross multiply

120 × time = 950

Divide both side by 120

Time = 950 / 120

Time = 7.92 h

Learn more about speed:

brainly.com/question/680492

#SPJ1

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How many grams of ice at -13 deg C must be added to 711 grams of water that is initially at a temperature of 87 deg C to produce
Basile [38]

Answer:

The answer to your question is m = 4.7 kg

Explanation:

Data

Ice                                   Water

mass = ?                          mass = 711 g

T₁ = -13°C                         T₁ = 87°C

T₂ = 10°C                         T₂ = 10°C

Ch = 2090 J/kg°K          Cw = 4180 J/kg°K

Process

1.- Convert temperature to kelvin

T₁ = 273 + (-13) = 260°K

T₁ water = 87 + 273 = 360 °K

T₂ = 10 + 273 = 283°K

2.- Write the equation of interchange of heat

                 - Heat lost = Heat absorbed

               - mwCw(T₂ - T₁) = miCi(T₂ - T₁)

-Substitution

              - 0.711(4180)(10 - 87) = m(2090)(10 - (-13))

- Simplification

                            228842.46 = 48070m

                            m = 228842.46/48070

-Result

                            m = 4.7 kg

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Answer:

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As you move from left to right across a period, what happens to the atomic radil?
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Moving Across a Period

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