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stiks02 [169]
3 years ago
11

HURRY PLEASE (MULTI CHOICE)

Chemistry
2 answers:
Mama L [17]3 years ago
6 0
The magnets in a maglev train system help move, or propel, the train
Lera25 [3.4K]3 years ago
5 0

Answer:

maglev

Explanation:

<em>In</em><em> </em><em>a</em><em> </em><em>train</em><em> </em><em>system</em><em> </em><em>two</em><em> </em><em>magnets</em><em> </em><em>are</em><em> </em><em>present</em><em>:</em><em>one</em><em> </em><em>set</em><em> </em><em>to</em><em> </em><em>repel</em><em> </em><em>and</em><em> </em><em>push</em><em> </em><em>the</em><em> </em><em>train</em><em> </em><em>up</em><em> </em><em>off</em><em> </em><em>the</em><em> </em><em>track</em><em>,</em><em>and</em><em> </em><em>another</em><em> </em><em>set</em><em> </em><em>the</em><em> </em><em>elevated</em><em> </em><em>train</em><em> </em><em>ahead</em><em>,</em><em>taking</em><em> </em><em>advantage</em><em> </em><em>of</em><em> </em><em> </em><em>the</em><em> </em><em>lack</em><em> </em><em>of</em><em> </em><em>friction</em><em>.</em>

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Why were chlorofluorocarbons first developed?
Sergio [31]
CFCs and their associated compounds were developed in the early 1900s as a non-toxic, non-flammable solution to other more dangerous products such as ammonia.
5 0
3 years ago
A solution 0.20 molar in monomer (styrene) and 4.0 X 10-3 M in benzoyl peroxide initiator is heated at 60°C. kp = 145 liter/mole
Elden [556K]

Answer:

Part A and B are attached

Explanation:

4 0
3 years ago
Read 2 more answers
Consider a pot of water at 100 C. If it took 1,048,815 J of energy to vaporize the water and heat it to 135 C, how many grams of
jeka57 [31]

Answer:

There was 450.068g of water in the pot.

Explanation:

Latent heat of vaporisation = 2260 kJ/kg = 2260 J/g = L

Specific Heat of Steam = 2.010 kJ/kg C = 2.010 J/g = s

Let m = x g be the weight of water in the pot.

Energy required to vaporise water = mL = 2260x

Energy required to raise the temperature of water from 100 C to 135 C = msΔT = 70.35x

Total energy required = 2260x+x\times2.010\times(135-100)=2260x+70.35x=2330.35x

2330.35x=1048815\\x=450.068g

Hence, there was 450.068g of water in the pot.

8 0
3 years ago
An atom has 11 protons, 10 electrons and 13 neutrons. What is the<br> charge for this atom?
Aliun [14]

Answer:

<h3>the charge is +1 </h3>

Explanation:

<h3>as we know nutral atom have equal number of protons and electrons</h3><h3>from the give this element have 11 protons so if it is nutral it must have 11 electrons,but in the question this atom is charged this means it gains or losts certain amount of electrons , this atom has 11 proton and 10 electron from this we can understand this atom dicreases by 1 from its proton, this means it losts one electron .</h3><h3>when an atom lostes electron it's charge become positive with the number of electrons it lostes .</h3><h3>this atom lost 1 electron there fore it have +1 charge and become ion called cathion</h3>

3 0
2 years ago
Compounds can be made by combining ________
Anni [7]

Answer:

hfew hv ihrv i

Explanation:

3 0
3 years ago
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