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3 years ago

The line that is drawn perpendicular to the point at which a wave intersects a boundary is know as the

1 answer:

fomenos3 years ago

5 0

<span>The line that is drawn perpendicular to the point at which a wave intersects a boundary is know as the Normal .

When the normal is drawn, the incident ray makes an angle with it known as the angle of incidence and the reflected ray makes an angle with it known as the angle of incidence. These angles are always equal.

The refracted ray makes an angle with the normal known as angle of refraction. The sin of angle of incidence to the sin of angle of refraction is called the refractive index( </span>μ= <span>sin i / sin r) .

hope all of it helps you!</span>

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. What happens to the polarity of an electromagnet when the direction of the current passing through it is reversed?

eduard

Answer:

The polarity of electromagnet also gets reversed when the direction of current is reversed. The current flows from negative terminal to positive terminal in an electromagnet due to the flow of electrons so polarity is also established in the electromagnet. As, the current direction is reversed, the polarity of magnet also gets reversed because the polarity of magnet depends on the direction of the current.

6 0

4 years ago

Calculate the acceleration due to gravity at a point 1000km above the surface of the earth?

klio [65]

Answer:

g' = 6.74 m/s²

Explanation:

R = 6400km

h = 1000km

g = 9.81m/s

g' = g(1 - 2h/R)

Goodluck

3 0

4 years ago

What property of an object is related to the average kinetic energy of the particles in that object

Butoxors [25]

Answer:

Temperature of the object

Explanation:

According to kinetic theorem of gases, the temperature of a gas is a measure of the of the average kinetic energy of the gas particle.

A particle can either exist as solid, liquid or gas.

For solid, the particles are fixed as they rotates and vibrate about a mean position.

The particle of an object is a solid particle.

In accordance to kinetic theorem, the temperature of an object related to the average kinetic energy of the particles in the object.\

Temperature: This can be defined as the degree of hotness or coldness of an object.

6 0

3 years ago

use the periodic table to determine which of the following would be an isotope of bromine (br) check all that apply

gayaneshka [121]

The isotopes of a element is defined as the atoms having same atomic number and different mass number.

As per periodic table Br has atomic umber Z=35 and its atomic mass is given as 79.904 or 79.

As per the question nothing has been mentioned .

so all the atoms whose atomic number will correspond to 35 will be considered as the isotope of bromine.

Generally Bromine exhibits two isotopes which are stable.The isotopes are Bromine-81 and Bromine-77.

Some times during the process of gamma decay Bromine forms many radio isotopes also which are unstable.

5 0

4 years ago

According to the Guinness Book of World Records, the longest home run ever measured was hit by Roy "Dizzy" Carlyle in a minor le

g100num [7]

Answer:

Part A: 43 m/s

part B: 40 m i don't know why it is 40 not 42

Explanation:

Part A

you have

range = 188m

since you have an angle which means parabolic graph like this

you will use the range special rule, which is equal to (v₀²sin(2θ))/g

188=v₀²sin(88)/(9.8)

you will find the answer

Part B

You will the formula Δy=v₀t-(1/2)(g)(t²)

such that v₀ is in y direction which means it will be 43sin(44) in this equation and the time can be got using the special formula t=v₀ in y direction /g

then you will plug the time in the quadratic equation

Finally after you get the answer you will subtract 3 from it, but you will find it 42 not 40 , which is the right answer

6 0

3 years ago