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4 years ago

A laser beam strikes a plane's surface with an angle of52.

Physics

1 answer:

Vadim26 [7]4 years ago

7 0

Answer:

Angle between incident ray and reflected ray will be 104°

Explanation:

We have given angle of incidence = 52 °

From law of reflection angle of incidence will be equal to angle of reflection

So angle of reflection will be also 52°

We have to find the angle between incident ray and reflected ray

As the incidence angle and reflected angle both is from normal of the surface and opposite to each other

So angle between incident ray and reflected ray will be 52°+52° = 104°

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Describe how and why molecular movement and position will change when heat is added.

skelet666 [1.2K]

Answer:

the molecules well speed up

Explanation:

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3 years ago

Read 2 more answers

A coil has an inductance of 6.00 mH, and the current in it changes from 0.200 A to 1.50 A in a time interval of 0.300 s. Find th

Andre45 [30]

Answer:

0.026 V

Explanation:

Given that,

Inductance of the coil, L = 6 mH

The current changes from 0.2 A to 1.5 A in a time interval of 0.3 s

We need to find the magnitude of the average induced emf in the coil during this time interval. The formula for the induced emf is given by :

$\epsilon=L\dfrac{dI}{dt}\\\\=6\times 10^{-3}\times \dfrac{1.5-0.2}{0.3}\\\\=0.026\ V$

So, the magnitude of induced emf is 0.026 volts.

5 0

3 years ago

- When an object is dropped what happens to potential and kinetic energy as it falls?

aev [14]

The answer is D: the GPE goes down and the KE goes up

7 0

3 years ago

PLEASE HELP. A substance decays according the the equation ae^-0.0025t, where t is in minutes. Find the half life of the substan

mojhsa [17]

First of all, that's not an equation. An equation needs an 'equals' sign ( = ),
so you need something like

   Amount present = a e^-0.0025t .

   'a' = amount present when t = 0 .

The half-life is the time it takes for the original amount to decay to half of it.

That's just 't' when       e^-0.0025t = 1/2

Take the natural log of each side: -0.0025t = ln(0.5)

Divide each side by -0.0025 : t = ln(0.5) / (-0.0025) =

   (-0.69315) / (-0.0025) =

   <em>t = 277.26 minutes</em>

( 4hrs 37min 15.5sec)

Rounded to nearest tenth: t = 277.3 minutes .

3 0

4 years ago

A stuntman drives a car with a mass of 1500 kg on a drawbridge. The car accelerates with a constant force of 10,000 N. While he

Viktor [21]

Answer:

1.77 m/s^2

Explanation:

There are two forces acting on the car along the direction parallel to the incline:

- The driving force of 10,000 N, which pushes forward

- The component of the weigth of the car parallel to the incline, which pulls backward

The component of the weight of the car parallel to the incline is:

$W_p = mg sin \theta=(1500 kg)(9.8 m/s^2)( sin 30^{\circ})=7350 N$

So now we can apply Newton's second law to find the acceleration of the car:

$F-W_p = ma\\a=\frac{F-W_p}{m}=\frac{10000 N-7350 N}{1500 kg}=1.77 m/s^2$

7 0

3 years ago