2 years ago

State two uses of total internal reflection

1 answer:

8 0

Answer:

The phenomenon of total internal reflection of light is used in many optical instruments like telescopes, microscopes, binoculars, spectroscopes, periscopes

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A position vector in the first quadrant has an x-component of 18 m and a magnitude of 30 m. What is the value of its y-component

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Answer:

The value is 24meters

Explanation:

Using

r= xi+yj

To get the magnitude of vector x

We say

/r/= √x²+y²

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y= √576

Y= 24m

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2 years ago

Charge is uniformly distributed around a ring of radius R and the resulting electric field magnitude E is measured along the rin

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Answer:

$x=\dfrac{r}{\sqrt2}$

Explanation:

Given that

Radius =r

Electric filed =E

Q=Charge on the ring

The electric filed at distance x given as

$E=K\dfrac{Q}{(r^2+x^2)^{3/2}}$

For maximum condition

$\dfrac{dE}{dx}=0$

$E=K{Q}{(r^2+x^2)^{-3/2}}$

$\dfrac{dE}{dx}=K{Q}{(r^2+x^2)^{-3/2}}-\dfrac{3}{2}\times 2\times x\times K{Q}{(r^2+x^2)^{-5/2}}$

For maximum condition

$\dfrac{dE}{dx}=0$

$K{Q}{(r^2+x^2)^{-3/2}}-\dfrac{3}{2}\times 2\times x\times K{Q}{(r^2+x^2)^{-5/2}}=0$

$r^2+x^2-3x^2=0$

$x=\dfrac{r}{\sqrt2}$

At $x=\dfrac{r}{\sqrt2}$ the electric field will be maximum.

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A 20-kg barrel is rolled up a 20-m ramp to the back of a truck whose floor is 5.0 m above the ground. What work is done in loadi

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θ = 14.4775°

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Work is product of net force and distance:
W = F net * d = 49 * 20

Work = 980 J

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We know,
V= f× wavelength
10.5= f×0.15
f=10.5/0.15
f= 70 Hz

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3 years ago

Which term describes the tendency of an organism to regulate internal conditions for maintaining good health?

meriva

Homeostasis: this is the body’s way of creating an internal state of equilibrium.

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State two uses of total internal reflection​

State two uses of total internal reflection