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3 years ago

How long does it take the baton to complete one spin?

1 answer:

7 0

The centripetal acceleration is given by:
a = 4π²R/T²

Using this formula,
47.82T² = 4π² x (0.76/2)
T = 0.56 s

The answer is B.

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For a certain optical medium the speed of light varies from a low value of 1.90 × 10 8 m/s for violet light to a high value of 2

Dmitry_Shevchenko [17]

Answer:

a. The refractive index ranges from 1.5 - 1.56

b. 18.7° for violet light and 19.5° for red light.

c. 33.7° for violet light and 35.3° for red light.

Explanation:

a. The refractive index of an object is the ratio of the speed of light in a vacuum and the speed of light in the object.

Mathematically,

$n = \frac{c}{v}$

The speed of violet light in the object is $1.9 * 10^8 m/s$ .

The speed of red light in the object is $2 * 10^8 m/s$

Hence, the refractive index for violet light is:

$n = \frac{3 * 10^8 }{1.9 * 10^8} \\\\n = 1.56$

and for red light, it is:

$n = \frac{3 * 10^8 }{2 * 10^8} \\\\n = 1.5$

Hence, the refractive index ranges from 1.5 - 1.56.

b. The refractive index is also the ratio of the sine of the angle of incidence to the sine of the angle of refraction.

$n = \frac{sin(i)}{sin(r)}$

The angle of incidence is 30°.

The angle of refraction for violet light will be:

$1.56 = \frac{sin(30)}{sin(r)}\\ \\sin(r) = \frac{sin(30)}{1.56} = \frac{0.5}{1.56} \\\\sin(r) = 0.3205\\\\r = 18.7^o$

And the angle of refraction for red light will be:

$1.5 = \frac{sin(30)}{sin(r)}\\ \\sin(r) = \frac{sin(30)}{1.5} = \frac{0.5}{1.5} \\\\sin(r) = 0.3333\\\\r = 19.5^o$

The angle of refraction for red light is larger than that of violet light when the angle of incidence is 30°.

c. The angle of incidence is 60°.

The angle of refraction for violet light will be:

$1.56 = \frac{sin(60)}{sin(r)}\\ \\sin(r) = \frac{sin(60)}{1.56} = \frac{0.8660}{1.56} \\\\sin(r) = 0.5551\\\\r = 33.7^o$

And the angle of refraction for red light will be:

$1.5 = \frac{sin(60)}{sin(r)}\\ \\sin(r) = \frac{sin(60)}{1.5} = \frac{0.8660}{1.5} \\\\sin(r) = 0.5773\\\\r = 35.3^o$

The angle of refraction for red light is still larger than that of violet light when the angle of incidence is 60°.

6 0

3 years ago

HOW do I find 25? *picture included* plz answerrr

pogonyaev

Subtract all numbers to your answer

3 0

3 years ago

Which object has a net force of -68 N?

Neko [114]

Answer:

5 or 6

Explanation:you

8 0

3 years ago

It took 1.5 hours for a bus to go from one City to the next the bus traveled at an average velocity of 52 mph west how far apart

Lorico [155]

Answer: 78 metres

Explanation:

The average velocity of the bus refers to the rate of change of its distanced travelled in the westward direction per unit time.

Thus, Velocity V = Distance travelled (D)/ time taken (T)

Then, average velocity = 52 metres per hour (mph)

Time taken = 1.5 hour

To get the distance travelled (D), make it the subject formula

D = V x T

D = velocity x time taken

D = 52 mph x 1.5 hour

D = 78 metres

Thus, the bus traveled a distance of 78 metres between the two cities.

5 0

3 years ago

Que representa la educación física desde sus distintas disciplinas o enfoques

Elan Coil [88]

Answer:

Human life consists of four aspects: the physical, mental, emotional and spiritual levels of existence.

La vida humana consta de cuatro aspectos: los niveles de existencia físico, mental, emocional y espiritual.

Explanation:

4 0

3 years ago