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xeze [42]
3 years ago
6

3. Identify three elements and three compounds. How are they similar? How are they different?

Physics
1 answer:
Basile [38]3 years ago
6 0

Answer:  A compound is a substance formed when two or more elements are chemically joined. Water, salt, and sugar are examples of compounds. When the elements are joined, the atoms lose their individual properties and have different properties from the elements they are composed of.

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A 3250-kg aircraft takes 12.5 min to achieve its cruising
scoundrel [369]

Answer:

effeciency n = = 49%

Explanation:

given data:

mass of aircraft 3250 kg

power P = 1500 hp = 1118549.81 watt

time = 12.5 min

h = 10 km = 10,000 m

v =85 km/h = 236.11 m/s

n = \frac{P_0}{P}

P_o = \frac{total\ energy}{t} = \frac{ kinetic \energy + gravitational\ energy}{t}

kinetic energy= \frac{1}{2} mv^2  =\frac{1}{2} 3250* 236 = 90590389.66 kg m^2/s^2

kinetic energy = 90590389.66 kg m^2/s^2

gravitational energy = mgh = 3250*9.8*10000 = 315500000.00  kg m^2/s^2

total energy = 90590389.66 +315500000.00 = 409091242.28 kg m^2/s^2

P_o =\frac{409091242.28}{750} = 545454.99 j/s

effeciency\ n = \frac{P_o}{P} = \frac{545454.99}{1118549.81} = 0.49

effeciency n = = 49%

8 0
2 years ago
If air resistance acts on a falling object will all of its potential energy be converted into kinetic energy?
Mademuasel [1]

Answer:

No, some energy will be dissipated energy due to work of air resistance.

6 0
2 years ago
Wegener named the supercontinent Pangaea, which means
Usimov [2.4K]
Pangea means "All-Earth"
4 0
2 years ago
Can someone give me the answers
Monica [59]
1 is A
2 is D
3 is D
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8 0
3 years ago
Explain why chlorine forms a -1 ion, but sulfur froms a -2 ion
12345 [234]
As both chlorine and sulfur throw their electrons such that they achieve their stable electrons to be the so called " modal atom " Therefore chlorine have to throw 1 electron to form 8 and sulfur have to throw 2 to form 8 . Therefore if they throw it will be negative while if they add it will be positive .
* Remember ( All Atmos have electronic figuration of most 2,8 or 2,8,8,8 )
4 0
3 years ago
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