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3 years ago

URGENT!!!! WILL GIVE BRAINLIEST!!!!!! 15 POINTS

2 answers:

7 0

You've got the whole answer right there in your question. The angle of incidence is the angle between the line normal to the surface and the beam of light coming into the surface. (Normal means perpendicular.)

Artyom0805 [142]3 years ago

3 0

It's the angle made by the incident ray when it's perpendicular to the surface. (Perpendicular lines are the lines that form a graph or like a 90-degree angle)

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DUE TODAY PLEASE HELP.....WILL GIVE BRANIST!!!!!!!

Karo-lina-s [1.5K]

girl how someone supposed to help you with that?!

7 0

3 years ago

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Un niño empuja una carreta con su perro dentro. La masa del perro y la carreta juntos es de 45 kg. La carreta

Zielflug [23.3K]

Answer:

The force exerted by the child is 38.25 Newton

Explanation:

We use the formula F=mxa (m=mass and a= aceleration):

F= 45kg x 0,85 m/s2=38, 25 kgxm/s2= <em>38, 25 N</em>

8 0

3 years ago

Power is equivalent to the energy released divided by the time taken to release the energy. true false

earnstyle [38]

P=E/t
check physic Formula ..
answers is true

3 0

3 years ago

Meteor Infrasound A meteor that explodes in the atmosphere creates infrasound waves that can travel multiple times around the gl

ladessa [460]

Answer:

The frequency of these waves is $4.27\times10^{-2}\ Hz$

Explanation:

Given that,

Wavelength = 6.6 km

Distance = 8810 km

Time t = 8.67 hr

We need to calculate the velocity of sound

Using formula of velocity

$v = \dfrac{D}{T}$

Where, D = distance

T = time

Put the value into the formula

$v =\dfrac{8810}{8.67}$

$v=1016\ km/hr$

We need to calculate the frequency

Using formula of frequency

$v=n\lambda$

$n=\dfrac{v}{\lambda}$

Put the value into the formula

$n=\dfrac{1016}{6.6}$

$n=153.93\ hr$

$n=\dfrac{153.93}{60\times60}$

$n=0.0427\ Hz$

$n=4.27\times10^{-2}\ Hz$

Hence, The frequency of these waves is $4.27\times10^{-2}\ Hz$

8 0

3 years ago

How is our magnetic field made?

Grace [21]

Answer:

On Earth, flowing of liquid metal in the outer core of the planet generates electric currents. The rotation of Earth on its axis causes these electric currents to form a magnetic field which extends around the planet. The magnetic field is extremely important to sustaining life on Earth.

Explanation:

Hope this helps!

7 0

2 years ago

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