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Stells [14]
3 years ago
12

Galileo started modern science because he started using ? Rather than speculation

Physics
1 answer:
Eva8 [605]3 years ago
4 0
By using the telescope
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how fast in revolutions per minute must a centrifuge rotate in order to subject the contents of a test tube (30cm) from the axis
trapecia [35]

Answer:

ω=6684.51 rpm

Explanation:

r= 30cm= 0.3m

a= 15000gs (convert to m/s^{2}

1g = 9.8 m/s^{2}

a= 15000 *9.8 = 147000 m/s^{2}

a=\frac{v^{2} }{r}

147000 = \frac{v^{2} }{0.3}

147000*0.3 = v^{2}

44100 = v^{2}

√44100 = v

210m/s  = v

v=210m/s (linear velocity)

we will convert this to angular velocity

ω=\frac{v}{r}  

ω= 210/0.3

ω= 700 rads^{-1}

we will convert this to rev per minute

1rad per second = 9.5493 rev per minute

ω= 700*9.5493

ω=6684.51 rpm

4 0
3 years ago
The sine of the incident angle is 0.217; the sine of the refracted angle is 0.173. Calculate the index of refraction.
Tju [1.3M]

Answer:

1.3.

Explanation:

From the question given above, the following data were obtained:

Sine of incident angle (Sine i) = 0.217

Sine of refracted angle (Sine r) = 0.173

Refractive index (n) =?

From snell's law, the Refractive index is simply defined as the ratio of the sine of the incident angle to sine of the refracted angle. Mathematically, it is expressed as:

Refractive index = Sine of incident angle / sine of refracted angle

n = Sine i / Sine r

With the above formula, we can obtain index of refraction as shown below:

Sine of incident angle (Sine i) = 0.217

Sine of refracted angle (Sine r) = 0.173

Refractive index (n) =?

n = Sine i / Sine r

n = 0.217 / 0.173

n = 1.3

Thus, the index of refraction is 1.3.

6 0
3 years ago
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Please help<br>Will give the brainliest!​
Ronch [10]

Answer:

both answer is option C

Explanation:

tag me brainliest

7 0
2 years ago
Complete the statement below with the correct term.
dimaraw [331]
Two or three i believe to be the answer
7 0
3 years ago
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1
Luda [366]

Explanation:

heat engine is correct answer

3 0
3 years ago
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