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steposvetlana [31]
3 years ago
8

Which statement describes a scientific theory?

Physics
2 answers:
Sergeeva-Olga [200]3 years ago
7 0

Answer: its not "A law changes based on new observations and testing."

Explanation:

i just took the test it dont tell me whats the right Q ,all i know is that "A law changes based on new observations and testing." is wrong

Olin [163]3 years ago
5 0

Answer:

A theory changes based on new observations and testing.

Explanation:

Theories are very critical part of the scientific methods with usually starts with simple observations around.

Scientific theories abounds. They typically provide explanation into a phenomenon and gives us the reason why something occurs or not.

  • They are usually based on multiple laboratory trials which have been repeated over and over again.
  • Most times, when new bodies of evidence suffice, a theory is often revised.
  • This will provide more detailed and scientifically au couture information about a phenomenon.
  • It is a law the usually states how things behave without explaining why they do so.
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A star with an original mass of 8 to 25 solar masses will ultimately become a ?
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The answer is C. Neutron star.

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2 years ago
An object takes 5 seconds to travel 25 meters. What is its speed?
alexira [117]

Answer:

5m/s is the answer s=d/t 25/5=5m/s

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The Goodyear blimp Spirit of Akron is 62.6m long and contains 7023m^3 of helium. When the temperature of the helium is 285 K, it
andre [41]

Answer:

1328.7032 kg

Explanation:

P = Pressure = 112 kPa

T = Temperature = 285 K

V = Volume = 7023 m³

R = Gas constant = 8.314 J/mol K

From the ideal gas law we have

PV=nRT\\\Rightarrow n=\dfrac{PV}{RT}\\\Rightarrow n=\dfrac{112000\times 7023}{8.314\times 285}\\\Rightarrow n=331960.04203\ moles

The mass of gas is given by

m=n\times MW_{He}\\\Rightarrow m=331960.04203\times 4.0026\times 10^{-3}\\\Rightarrow m=1328.70326\ kg

The mass of helium in the blimp is 1328.7032 kg

8 0
2 years ago
Discuss the difference between short-term and long-term fitness goals. Provide an example of each
photoshop1234 [79]

Answer:

. A long-term goal is a goal set for you to achieve with 3-5 years, while short-term goals take a few days, weeks, or maybe months. An example of a short-term is eating like less carbs. An example of a long-term running like a 5k marathon.

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2 years ago
A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerat
dexar [7]

Answer:

a) 282.8 m/s

b) 13812 revolutions

Explanation:

a) The aceleration(a) is the angular velocity(w) divide by the time. The disk had cosated for 12 s in a constant angular velocity, so it will be:

a = w/t

610 = w/12

w = 7230 rad/s

The angular velocity is related by the linear velocity:

V = w*r, where r is the radius of the circumference ( r = 0.08/2 = 0.04 m)

V = 7230*0.04 = 292.8 m/s

b) The number of revolutions is the frequency (f) of the moviment, which is related to the angular velocity as:

w = 2π*f

f = w/2π

f = 7230/6.28

f = 1151 revolutions/s

So, the total revolutions (n) is 12 s was:

n = 12*1151 = 13812 revolutions

3 0
3 years ago
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