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3 years ago

Which scientist first discovered that white light is a mixture of a rainbow spectrum of light rays?

2 answers:

5 0

c A ray of light is divided into its constituent colors by the first prism (left), and the resulting bundle of colred rays is reconstituted into white light by the second. Our modern understanding of light and color begins with Isaac Newton (1642-1726) and a series of experiments that he publishes in 1672.

isaac newton

katovenus [111]3 years ago

4 0

Answer:

The correct answer is Isaac Newton , option C

Explanation:

During the 1660’s, Newton, an English physicist, started some experiments with sunlight and prisms to know more about the optic field. He passed sunlight through a prism and separated the light beam into various colours. Once he did it, he discovered and understood that this could happened because every different ray of colour is diverged by the glassy prism by a different amount. Consequently, he could conclude that white light passes through a translucent medium, such as air, into another like glass, the components are glanced the first-time up t their colour and when they go back to air they do it again. This created the spectrum with the rainbow colours.

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a 1500kg weather rocket is launched upward from the ground and accelerates at 10m/s it explodes 4s after lifeoff and breaks into

saveliy_v [14]

Answer:

v_h = 9 m/s

Explanation:

given,

mass of the rocket = 1500 kg

accelerates = 10 m/s²

time = 4 s

one fragment is twice as massive as the other.

maximum height reached by the lighter fragment = 530 m

now,

using equation of motion to calculate the velocity

initial velocity of rocket,u = 0 m/s

v = u + a t

v = at.......(1)

total mass of the rocket

M = m + m'

m' is the heavier particle mass.

m' = 2 m (from the statement given in the question)

M = 3 m

m = M/3

now, again using equation of motion to calculate the initial velocity of the lighter particle.

v² = u² + 2 a s

0² = u² + 2 g h

u = √2gh.....(2)

now,

using conservation of momentum,

$M v = m u + m' v_h$

$M at = \dfrac{M}{3}u + \dfrac{2M}{3}v_h$

$at = \dfrac{u}{3}+ \dfrac{2v_h}{3}$

$10\times 4 = \dfrac{\sqrt{2gh}}{3}+ \dfrac{2v_h}{3}$

$120= \sqrt{2\times 9.8 \times 530}+2v_h$

2 v_h = 18

v_h = 9 m/s

speed of the heavy fragment is equal to 9 m/s

6 0

4 years ago

A conducting sphere contains positive charge distributed uniformly over its surface. Which statements about the potential due to

user100 [1]

The correct answer is C. The potential at the center of the sphere is the same as
the potential at the surface

5 0

3 years ago

The valence electrons of metals are weakly attracted to the parent nuclei, so the electrons break free and float. The moving ele

siniylev [52]

The valence electrons of metals are weakly attracted to the parent nuclei, so the electrons break free and float. The moving electrons form a electron negative blanket that binds the atomic positive nuclei together, forming a metallic bond.

So the answers are { Negative } and { Positive }.

Please vote Brainliest (:

5 0

3 years ago

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2. A car with mass 2,500 kg is travelling at 15 m/s. What is the car's kinetic energy?

BabaBlast [244]

Answer:

c, 280,000J

Explanation:

You should use the equation KE (Kinetic Energy) = $\frac{1}{2} mv^2$

m = 2500

v = 15

KE = $\frac{1}{2} * 2500 * (15)^2\\$

KE = 281250 Joules.

This is consistent with the answer B, as all of the parameters given to you are rounded to 2 significant figures so naturally, the answer should also be rounded to 2 sig figs.

KE = 280,000 J

7 0

3 years ago

A dinner plate falls vertically to the floor and breaks up into three pieces, which slide horizontally along the floor. Immediat

Olegator [25]

Answer:

Explanation:

There will be conservation of momentum along horizontal plane because no force acts along horizontal plane.

momentum of first piece = .320 kg x 2 m/s

= 0.64 kg m/s along x -axis.

momentum of second piece = .355 kg x 1.5 m/s

= 0.5325 kg m/s along y- axis .

Let the velocity of third piece be v and it is making angle of θ with x -axis .

Horizontal component of its velocity = .100 kg x v cosθ = .1 v cosθ

vertical component of its velocity = .100 kg x v sinθ = .1 v sinθ

For making total momentum in the plane zero

.1 v cosθ = 0.64 kg m/s

.1 v sinθ = 0.5325 kg m/s

Dividing

Tanθ = .5325 / .64 = .83

θ = 40⁰.

The angle will be actually 180 + 40 = 220 ⁰ from positive x -axis.

6 0

3 years ago

Read 2 more answers