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Gelneren [198K]
2 years ago
15

The visible spectrum refers to the tiny portion of the electromagnetic spectrum that we ________.

Physics
1 answer:
marusya05 [52]2 years ago
3 0

Answer:

are able to see/observe

Explanation:

Humans are not able to see most wavelengths in the universe--but there is a select range that is visible to our eyes. This (which is usually shown on an electromagnetic spectrum diagram/chart/depiction by a small portion of rainbow) is the visible light spectrum

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(1 point) A frictionless spring with a 3-kg mass can be held stretched 1.6 meters beyond its natural length by a force of 90 new
Nonamiya [84]

Answer:

x(t)=0.337sin((5.929t)

Explanation:

A frictionless spring with a 3-kg mass can be held stretched 1.6 meters beyond its natural length by a force of 90 newtons. If the spring begins at its equilibrium position, but a push gives it an initial velocity of 2 m/sec, find the position of the mass after t seconds.

Solution. Let x(t) denote the position of the mass at time t. Then x satisfies the differential equation  

m \frac{d^{2}x}{dt^{2}} +kx=0

Definition of parameters  

m=mass 3kg

k=force constant

e=extension ,m

ω =angular frequency

k=90/1.6=56.25N/m

ω^2=k/m= 56.25/1.6

ω^2=35.15625

ω=5.929

General solution will be

x(t)=c1cos(ωt)+c2Sin(ωt)

x(t)=c1cos(5.929t)+c2Sin(5.929t)

differentiating x(t)

dx(t)=-5.929c1sin(5.929t)+5.929c2cos(5.929t)

when x(0)=0, gives c1=0

dx(t0)=2m/s gives c2=0.337

Therefore, the position of the mass after t seconds is  

x(t)=0.337sin((5.929t)

6 0
3 years ago
In the sum A→+B→=C→, vector A→ has a magnitude of 13.6 m and is angled 40.2° counterclockwise from the +x direction, and vector
il63 [147K]

Answer:

|B|=27.00425726m

\alpha =210.3781372°

Explanation:

Let's use the component method of vector addition:

A_x=13.6cos(40.2)=10.38762599\\A_y=13.6sin(40.2)=8.778224553\\Cx=13.8cos(20.7+180)=-12.90912763\\Cy=13.8sin(20.7+180)=-4.877952844

Now, we know:

C_x=A_x+B_x\\\\C_y=A_y+b_y

So:

B_x=C_x-A_x=-23.29675362\\B_y=C_y-A_y=-13.6561774

Now lets calculate the magnitude of the vector B:

|B|=\sqrt{(B_x)^{2} +(B_y)^{2}  }=27.00425726m

Finally its angle is given by:

\alpha =(arctan(\frac{B_y}{B_x}))+180=30.37813438+180=210.3781344°

Keep in mind that I added 180 to the angles of C and B to find the real angles measured from the + x axis counter-clock wise.

8 0
3 years ago
What does 9.8 m/s/s have to do with acceleration?
ruslelena [56]

9.8 is the gravitational field strength on earth, perhaps re-read the question

6 0
3 years ago
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Why are humans more like animals than plants?
valkas [14]
Because we dont reproduce the way plants do
6 0
4 years ago
How is a responding variable different from a manipulated variable?
shtirl [24]

Answer:

B

Explanation:

8 0
3 years ago
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