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Makovka662 [10]
3 years ago
7

Astronauts think planets formed from interstellar dust and gases that clumped together in a process called _

Physics
1 answer:
lora16 [44]3 years ago
8 0

planetary accretion is the term that is used

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) Water falls from a height of 60m at the rate of 15kg/s to operate a turbine. The losses due to frictional force are 10% of ene
Angelina_Jolie [31]

Answer:

8100W

Explanation:

Let g = 10m/s2

As water is falling from 60m high, its potential energy from 60m high would convert to power. So the rate of change in potential energy is

P = \dot{E} = \dot{m}gh = 15*10*60 = 9000 J/s or 9000W

Since 10% of this is lost to friction, we take the remaining 90 %

P = 9000*90% = 8100 W

3 0
3 years ago
Through x rays is harmful for human health it is used in medical field why?
ipn [44]
It is strong enough to penetrate through flesh but not bone so we can see if there are fractures or breaks in our skeleton
6 0
2 years ago
Sunspots appear dark because they are cooler than the surrounding solar surface. True or false
DiKsa [7]

Answer:

False, Sunspots appear dark (in visible light) due to their low temperature(cooler) than rest of the sun

Explanation:

Sunspots appear dark because they are much cooler( have low temperature than the rest of the surface contained by Sun. As they appear dark, but still they have very temperature that's why so hot. Sunspots have temperatures ranges  3,500 Celsius (3773 kelvin) and the surrounding surface of the sun has a temperature much higher of about 5,500 Celsius(5773 Kelvin). Even if we see a sunspot alone in space,  it will glow so brightly.

Learn more about sunspots :

brainly.com/question/27774496

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6 0
1 year ago
El resultado de pasar a notación científica la cifra 2 000 000 000 · 10 -15
tensa zangetsu [6.8K]
19,999,985 nomas creo y soy positivo que si es pero puedes ablar ingles
6 0
2 years ago
When two substances are mixed together, a color change is observed. Does this mean that a chemical reaction has definitely occur
Elanso [62]
Nope, color change can also occur during a physical change. 
7 0
3 years ago
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