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4 years ago

The shortest wavelength within the visible spectrum is _______ light.

Physics

2 answers:

Semmy [17]4 years ago

8 0

Violet : The shortest wavelengths are perceived as violet and the longest wavelengths are perceived as red.

Sindrei [870]4 years ago

7 0

Answer:

Aren't the choices these?

A. violet ,B. red , C. orange , D. blue

Then it would be A. violet, ur welcome:)

MARK BRAINLIEST

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Ace Manufacturing ordered 17 boxes with 85 ball bearings each.They also ordered 15 boxes with 90 spring each. How many more ball

photoshop1234 [79]

Answer

Explanation

One box has 85 ball bearings.

17 boxes = 17 × 85

= 1,445 ball bearing

One contains 90 springs

15 boxes ⇒ 15 × 90

⇒ 1,350 spring

Number of ball bearing more than springs are;

1445 - 1350 = 95

3 0

4 years ago

Suppose that she pushes on the sphere tangent to its surface with a steady force of F = 60 N and that the pressured water provid

sergey [27]

Answer:

25.06s

Explanation:

Remaining part of the question.

(A large stone sphere has a mass of 8200 kg and a radius of 90 cm and floats with nearly zero friction on a thin layer of pressurized water.)

Solution:

F = 60N

r = 90cm = 0.9m

M = 8200kg

Moment of inertia for a sphere (I) = ⅖mr²

I = ⅖ * m * r²

I = ⅖ * 8200 * (0.9)²

I = 0.4 * 8200 * 0.81

I = 2656.8 kgm²

Torque (T) = Iα

but T = Fr

Equating both equations,

Iα = Fr

α = Fr / I

α = (60 * 0.9) / 2656.8

α = 0.020rad/s²

The time it will take her to rotate the sphere,

Θ = w₀t + ½αt²

Angular displacement for one revolution is 2Π rads..

θ = 2π rads

2π = 0 + ½ * 0.02 * t²

(w₀ is equal to zero since sphere is at rest)

2π = ½ * 0.02 * t²

6.284 = 0.01 t²

t² =6.284 / 0.01

t² = 628.4

t = √(628.4)

t = 25.06s

8 0

4 years ago

A yet-to-be-built spacecraft starts from Earth moving at constant speed to the yet-tobe-discovered planet Retah, which is 20 lig

Gre4nikov [31]

Answer:

The time elapsed at the spacecraft’s frame is less that the time elapsed at earth's frame

Explanation:

From the question we are told that

The distance between earth and Retah is $d = 20 \ light \ hours = 20 * 3600 * c = 72000c \ m$

Here c is the peed of light with value $c = 3.0*10^8 m/s$

The time taken to reach Retah from earth is $t = 25 \ hours = 25 * 3600 =90000 \ sec$

The velocity of the spacecraft is mathematically evaluated as

$v_s = \frac{d }{t}$

substituting values

$v_s = \frac{72000 * 3.0*10^{8} }{90000}$

$v_s = 2.40*10^{8} \ m/s$

The time elapsed in the spacecraft’s frame is mathematically evaluated as

$T = t * \sqrt{ 1 - \frac{v^2}{c^2} }$

substituting value

$T = 90000 * \sqrt{ 1 - \frac{[2.4*10^{8}]^2}{[3.0*10^{8}]^2} }$

$T = 54000 \ s$

=> $T = 15 \ hours$

So The time elapsed at the spacecraft’s frame is less that the time elapsed at earth's frame

7 0

3 years ago

In a shuffleboard game, the puck slides a total of 12 m on a horizontal surface before coming to rest. if the coefficient of kin

ivanzaharov [21]

Given that,

Puck slide total Deltax = 12m

Puck and board Mk = 0.10

Find the initial speed = ?

We know that,

Vf^2-Vi^2 = 2a Deltax

-Vi^2 = -2MkgDeltax ............(1)

then,

fk = -Mk mg = ma

a = -Mkg .........(2)

From equation (1),

Vi^2 = 2MkgDeltax

Vi = âš2MkgDeltax [g=9.8m/s^2]

Vi = âš2(0.10)(0.98)(12)

Vi = âš0.2(9.8)(12)

   Vi = âš1.92(12)

Vi = âš23.52

Vi = 4.8 m/s

Therefore the initial speed of the puck Vi = 4.8 m/s

3 0

3 years ago

Why is it difficult to see colors outside at night?

IgorLugansk [536]

I think it is B hope this helps

God Bless

3 0

4 years ago

Read 2 more answers