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kherson [118]
3 years ago
15

How do most primary producers make their own food?​

Physics
2 answers:
Murljashka [212]3 years ago
5 0
They use the sun to make their own food
MrRissso [65]3 years ago
3 0

Answer:

in a kitchen

Explanation:

only if they're producing

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In thermodynamics, a closed system is a system where _____
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In a closed system, energy in form of heat (work) can be exchanged but not matter.

The answer to your question is C.

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3 0
3 years ago
A ray is incident on a film of thickness t and the index of refraction n=1.6 at an angle θ = 35 degrees. Find the angle of refra
lidiya [134]

Answer

Given,

refractive index of film, n = 1.6

refractive index of air, n' = 1

angle of incidence, i = 35°

angle of refraction, r = ?

Using Snell's law

n' sin i = n sin r

1 x sin 35° = 1.6 x sin  r

 r = 21°

Angle of refraction is equal to 21°.

Now,

distance at which refractive angle comes out

d = 2.5 mm

α be the angle with horizontal surface and incident ray.

α = 90°-21° = 69°

t be the thickness of the film.

So,

tan \alpha = \dfrac{t}{d/2}

tan 61^0 = \dfrac{t}{2.5/2}

t = 2.26 mm

Hence, the thickness of the film is equal to 2.26 mm.

4 0
3 years ago
For the simple harmonic motion equation
My name is Ann [436]
Given that : d = 5sin(pi t/4), So, maximum displacement, d = 5*(+1) = 5 Also, maximum displacement, d = 5*(-1) = -5 
3 0
3 years ago
What is the mass number of the missing daughter nuclei?
Nastasia [14]

Answer:

90

Explanation:

The mass number of the missing daughter nuclei can be obtained as shown in the attached photo.

6 0
3 years ago
Read 2 more answers
Helpp me pleassee....
lilavasa [31]

Answer:

The fundamental wavelength of the vibrating string is 1.7 m.

Explanation:

We have,

Velocity of wave on a guitar string is 344 m/s

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f=\dfrac{v}{2l}\\\\f=\dfrac{344}{2\times 0.85}\\\\f=202.35\ Hz

Now fundamental wavelength is :

\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{344}{202.35}\\\\\lambda=1.7\ m

So, the fundamental wavelength of the vibrating string is 1.7 m.

4 0
3 years ago
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