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4 years ago

A beam of sunlight falling on a prism refracts and forms seven color bands. This illustrates that

Physics

2 answers:

ExtremeBDS [4]4 years ago

4 0

That isn"t the right answer the correct answer is B.

SIZIF [17.4K]4 years ago

4 0

Answer: The correct option is d.

Explanation:

Dispersion is the phenomenon in which there is splitting of the white light into the different colors.

When the white light incidents on the prism then the light rays will get refracted. The white light will get split into the different colors. Light ray gets refracted when it travels from rarer medium to denser medium.

In the given problem, a beam of sunlight falling on a prism refracts and forms seven color bands. It shows that light is made up of seven different colors.

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URGENT!!!!! I WILL MARK U AS BRAINLIEST!!!!!!! A step-down transformer converts 120 V to 5 V in a phone charger. If the primary

Sloan [31]

Answer:

25 turns

Explanation:

The voltage ratio is the turns ratio:

secondary turns / primary turns = secondary voltage / primary voltage

secondary turns / 600 = 5/120

secondary turns = 600(5/120) = 25 . . . turns

The secondary coil has 25 turns.

6 0

3 years ago

A grocery shopper tosses a(n) 9.4 kg bag of rice into a stationary 19.9 kg grocery cart. The bag hits the cart with a horizontal

IRINA_888 [86]

The final speed of the cart and the bag is 2.2 m/s

Explanation:

We can solve this problem by using the law of conservation of momentum: in fact, in absence of external forces, the total momentum of the bag and the cart must be conserved before and after the collision.

Mathematically:

$p_i = p_f\\m_1 u_1 + m_2 u_2 = (m_1+m_2)v$

where:

$m_1 = 9.4 kg$ is the mass of the bag of rice

$u_1 = 7.0 m/s$ is the initial velocity of the bag

$m_2 = 19.9 kg$ is the mass of the cart

$u_2 =0 m/s$ is the initial velocity of the cart (at rest)

$v$ is the final combined velocity of the bag and the cart

Re-arranging the equation and solving for v, we find:

$v=\frac{m_1 u_1 + m_2 u_2}{m_1+m_2}=\frac{(9.4)(7.0)+0}{9.4+19.9}=2.2 m/s$

Learn more about momentum here:

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3 years ago

Action - reaction forces are created at the ________ time and act upon __________ objects

MArishka [77]

Newton's Third Law- For every action there is an equal and opposite reaction... Does this answer your question? If not, I can explain further...

6 0

3 years ago

A speaker generates a continuous tone of 440 Hz. In the drawing, sound travels into a tube that splits into two segments, one lo

chubhunter [2.5K]

Answer:

The minimum difference between the lengths of the two tubes should be 0.385 meters.

Explanation:

As we known that for any two waves to arrive in phase at any point the difference in the path traveled by the waves should be an integral multiple of the wavelength of the wave.

Mathematically we can write:

$\Delta x=n\frac{\lambda }{2}$

For the given wave we have

$\lambda =\frac{v}{\nu }$

Applying values we get

$\lambda =\frac{339}{440 }=0.77m$

Thus the minimum difference in the lengths of the tubes can be obtained by putting the value of n = 1

$\therefore \Delta x=1\times \frac{0.77}{2}=0.385m$

7 0

4 years ago

A ball is droped from a height of 16m how much time will pass before the ball hits the ground

sergey [27]

Answer:

The time is 1.8s

Explanation:

The ball droped, will freely fall under gravity.

Hence we use free fall formula to calculate the time by the ball to hit the ground

$h= \frac{1}{2}g{t}^{2}$

Where h is the height from which the ball is droped, g is the acceleration due to gravity that acted on the ball, and t is the time taken by the ball to hit the ground.

From the question,

h=16m

Also, let take

$g = 9.8m{s}^{-2}$