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Tamiku [17]
3 years ago
12

1st block

Physics
1 answer:
podryga [215]3 years ago
3 0

Answer:

2

Explanation:

kilogram and megagram is the larger unit

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On a hot day, the temperature of a 65,000-L swimming pool increases by 1.20°C. What is the net heat transfer during this heating
vichka [17]

Answer:

326149.2 KJ

Explanation:

The heat transfer toward and object that suffered an increase in temperature can be calculated using the expression:

Q = m*cv*ΔT

Where m is the mass of the object, cv is the specific heat capacity at constant volume, which basically means the amount of heat necessary for a 1kg of water to increase 1C degree in temperatur, and ΔT is the change in temperature.

A 65000 L swimming pool will have a mass of:

65000L *\frac{1m^3}{1000L} * \frac{1000kg}{1m^3} = 65000 kg

The specific heat capacity at constant volume of water is equal to 4.1814 KJ/KgC.

We replace the data and get:

Q = m*cv*ΔT = 65000 kg * 4.1814 KJ/KgC * 1.2°C = 326149.2 KJ

3 0
3 years ago
please help! need a answer as quick as possible please. i need help with questions 1 and 2 ! thank you
Mariulka [41]

Answer:

1.)When you arrive from school and you smell cookies baking in the kitchen your brain will tell you that you are hungry and that you should go to the kitchen at that point your sense organs like your nose helps you to detect that something is baking(cookies)and your nervous system (brain)will tell you that you are hungry and it will command/direct your brain to go to the kitchen then for you to eat the cookies and drink the milk the digestive system is going go help you to chew,swallow and digest the food which has been taken and when you also run to the kitchen at the beginning your brain will direct your skeletal and muscular system because the skeletons and muscles work hand in hand,and when you finish your meal the body will circulate some nutrients or minerals from the food or snack taken to other parts of the body for energy.

2.)When you sleep the whole body is asleep except the heart which needs to continue circulating blood around the whole system and sometimes the brain may not rest when you are sleeping it may continue to do it's work that's why some people usually sleep walk or sleep talk,it means the brain is not at rest and still doing some things....Thank you for the question I hope it is very useful to you.

7 0
3 years ago
Please show steps as to how to solve this problem <br> Thank you!
bezimeni [28]

Explanation:

Let x = distance of F_1 from the fulcrum and let's assume that the counterclockwise direction is positive. In order to attain equilibrium, the net torque \tau_{net} about the fulcrum is zero:

\tau_{net} = -F_1x + F_2d_2 = 0

-m_1gx + m_2gd_2 = 0

m_1x = m_2d_2

Solving for <em>x</em>,

x = \dfrac{m_2}{m_1}d_2

\:\:\:\:=\left(\dfrac{105.7\:\text{g}}{65.7\:\text{g}} \right)(13.8\:\text{cm}) = 22.2\:\text{cm}

4 0
3 years ago
Which of the following is not an example of a physical property?
iVinArrow [24]
Of the options presented in this problem, the answer would be C. reactivity.

Physical property is commonly known to be a s observable property of matters. This means, as the name suggests, that the physical property can be observed without the use of special instrument and other things to observe. Another thing is that it can be measured and put on a value and a standard unit of measurement. The physical property helps a lot in differentiating matter to matter and also aids in determining their uses and hazards as well. The boiling point and freezing point go hand in hand as to they are opposite to each other and are observed by the application of heat and the application of cold environment, respectively. As for density, it can be observed with the object being in contact with an adequate amount of water, if it will sink, float, or stay in the middle.
4 0
3 years ago
Read 2 more answers
Lab: Types of Reactions Assignment: Lab Report
Thepotemich [5.8K]

The types of chemical reactions are as follows:

  • Combination reactions
  • Decomposition reactions
  • Double decomposition
  • Thermal dissociation
  • Redox reactions

<h3>What the are the types of reactions?</h3>

Chemical reactions are changes in which new substances are formed.

The types of chemical reactions are as follows:

  • Combination reactions - these are reactions in which two or more substances combine to form a single compound
  • Decomposition reactions - these are reactions in which a larger compound splits into smaller substances
  • Displacement reactions - these are reactions in which one element or radical replaces another in a compound
  • Double decomposition - these are reactions in which two substances exchange their radicals to form new compounds.
  • Thermal dissociation - these reactions involves heating compounds to split them into smaller substances.
  • Redox reactions - these are reactions in which oxidation and reduction reactions occur simultaneously.

In conclusion, chemical reactions produce new substances.

Learn more about chemical reactions at: brainly.com/question/11231920

#SPJ1

9 0
2 years ago
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