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3 years ago

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You are asked to design a retroreflector using two mirrors that will reflect a laser beam by 180 degrees independent of the inci

dent direction of the beam. What should be the angle between the two mirrors?

1 answer:

prisoha [69]3 years ago

3 0

Answer:

Consider the diagram. We are effectively being asked to prove that $\alpha=i_1$, for any value of $i_1$. Now, from trigonometry,

Explanation:

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A Chevy Camaro drives straight off the top level off a parking garage at 9 m/s. If the car landed 81 meters away from the base o

Tatiana [17]

Answer:

The correct option is c: 396.9 meters.

Explanation:

First, we need to find the time at which the car landed:

$v = \frac{x}{t}$

$t = \frac{x}{v} = \frac{81 m}{9 m/s} = 9 s$

Now, we can find the height of the top-level:

$y_{f} = y_{0} + v_{0_{y}}t - \frac{1}{2}gt^{2}$

Since the car has only a velocity in the horizontal direction, we have:

$0 = y_{0} + 0*t - \frac{1}{2}gt^{2}$

$y_{f} = \frac{1}{2}gt^{2} = \frac{1}{2}9.81 m/s^{2}*(9 s)^{2} = 397 m$

Therefore, the correct option is c: 396.9 meters.

I hope it helps you!

3 0

2 years ago

Two blocks collide on a frictionless surface. After the collision, the blocks sticktogether. Block A has a mass M and is initial

jasenka [17]

Answer:

ΔPa = –2/3Mv

ΔPb = 2/3Mv

ΔPc = Mv.

Explanation:

See attachment below please.

5 0

3 years ago

The period of a mechanical wave is 5 seconds. what is the frequency of the wave?

Natasha_Volkova [10]

The frequency of a wave is just the reciprocal of the period.
For this one . . .

Frequency = 1/(period) = 1/(5 sec) = 0.2 per sec (0.2 Hz) .

4 0

3 years ago

Read 2 more answers

A long cylindrical capacitor is made of a central wire of radius a = 2.50 mm surrounded by a conducting shell of radius b = 7.50

asambeis [7]

Answer:

The capacitance per unit length is $5.06\times10^{-11}\ F/m$

(b) is correct option.

Explanation:

Given that,

Radius a= 2.50 mm

Radius b=7.50 mm

Dielectric constant = 3.68

Potential difference = 120 V

We need to calculate charge per length for the capacitance

Using formula of charge per length

$\lambda=\dfrac{4\pi\epsilon_{0}\Delta V}{2 ln(\dfrac{r_{2}}{r_{1}})}$

Put the value into the formula

$\lambda=\dfrac{120}{9\times10^{9}\times2 ln(\dfrac{7.50\times10^{-3}}{2.50\times10^{-3}})}$

$\lambda=6.068\times10^{-9}\ C/m$

We know that,

$\lambda=\dfrac{Q}{L}$

We need to calculate the capacitance per unit length

Using formula of capacitance per unit length

$C=\dfrac{\dfrac{Q}{L}}{\Delta V}$

$C=\dfrac{6.068\times10^{-9}}{120}$

$C=5.06\times10^{-11}\ F/m$

Hence, The capacitance per unit length is $5.06\times10^{-11}\ F/m$

7 0

3 years ago

g If the x-component of a force vector is 5.69 newtons and its y-component is 8.00 newtons, then what is its magnitude?

beks73 [17]

Answer:

F = 9.82 N

Explanation:

given,

Force x-component = 5.69 N

Force y-component = 8 N

magnitude of force = ?

Resultant of force

$F = \sqrt{F_x^2 + F_y^2}$

$F = \sqrt{5.69^2 + 8^2}$

$F = \sqrt{32.3761 + 64}$

$F = \sqrt{96.3761}$

F = 9.82 N

Hence, the magnitude of force is equal to 9.82 N

4 0

3 years ago

Read 2 more answers