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3 years ago

According to Huygens's principle, what is the explanation for boundary behaviors?

Physics

2 answers:

max2010maxim [7]3 years ago

4 0

A.) Each point on a wave front acts as a source of secondary waves.

Alex787 [66]3 years ago

3 0

Answer:

A.) Each point on a wave front acts as a source of secondary waves.

Explanation:

Huygen's principle can explain some phenomena such as the diffraction of light through a single or a double slit, and the interference pattern that we see on the screen. In fact, according to Huygen's principle, each point of the wave front inside the gap in the slit acts as a source of secondary waves: therefore, we can imagine all the points inside the slit as sources of secondary waves, and these waves interact with each other producing interference, and this is why we observe an interference pattern on the screen.

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1. A toy car with mass m1 travels to the right on a frictionless track with a speed of 3 m/s. A second toy car with mass m2 trav

Alika [10]

Answer:

v = 3(m1 - 2m2)/(m1 + m2)

Explanation:

Parameters given:

Velocity of first toy car with mass m1, u1 = 3 m/s (taking the right direction as the positive axis)

Velocity of second toy car with mass m2, u2 = -6 m/s (taking the left direction as the negative x axis)

Using conservation of momentum principle:

Total initial momentum = Total final momentum

m1*u1 + m2*u2 = m1*v1 + m2*v2

Since they stick together after collision, they have the same final velocity.

m1*3 + (m2 * -6) = m1*v + m2*v

3m1 - 6m2 = (m1 + m2)v

v = (3m1 - 6m2) / (m1 + m2)

v = 3(m1 - 2m2) / (m1 + m2)

8 0

3 years ago

Read 2 more answers

An object weighs 79.1 N in air. When it is suspended from a force scale and completely immersed in water the scale reads 21.8 N.

Free_Kalibri [48]

Answer:

(a). The density of the object is 1382 kg/m³.

(b). The density of the oil is 536.4 kg/m³.

Explanation:

Given that,

Weight in air = 79.1 N

Weight in water = 21.8 N

Weight in oil = 48.4 N

We need to calculate the volume of object

Using formula of buoyant force

$F_{b}=W_{air}=W_{water}$

$F_{b}=79.1-21.8$

$F_{b}=57.3\ N$

$F_{b}=\rho g h$

Put the value into the formula

$57.3=1000\times V\times 9.8$

$V=\dfrac{57.3}{1000\times9.8}$

$V=5.84\times10^{-3}\ m^3$

We need to calculate the density

Using formula of buoyant force

$F_{b}=\rho Vg$

$79.1=\rho\times5.84\times10^{-3}\times9.8$

$\rho=\dfrac{79.1}{5.84\times10^{-3}\times9.8}$

$\rho=1382\ kg/m^3$

The density of the object is 1382 kg/m³.

(b). We need to calculate the volume of object

Using formula of buoyant force

$F_{b}=W_{air}=W_{oil}$

$F_{b}=79.1-48.4$

$F_{b}=30.7\ N$

We need to calculate the density

Using formula of buoyant force

$F_{b}=\rho_{oil} Vg$

$30.7=\rho_{oil}\times5.84\times10^{-3}\times9.8$

$\rho_{oil}=\dfrac{30.7}{5.84\times10^{-3}\times9.8}$

$\rho=536.4\ kg/m^3$

The density of the oil is 536.4 kg/m³.

Hence, This is the required solution.

4 0

3 years ago

If a car stops suddenly, you feel "thrown forward." We’d like to understand what happens to the passengers as a car stops. Imagi

stellarik [79]

The forces acting on you are:

The gravitational pull of the Earth (an others Celestial objects)

The Normal Force that balance the gravitational pull and points upward.

That is. There is not need for any other force, cause the car its going at constant speed, so the acceleration its zero, as the net force its mass multiplied by acceleration, the net force is zero.

The forces acting on you are:

The gravitational pull of the Earth (an others Celestial objects)

The Normal Force that balance the gravitational pull and points upward.

That is. Again. The car its slowing down. But, it cant apply a force in you against the direction of movement to slow you down.

As you can't be slowed down, you will go forward at the same speed you had when the car went steady, and will crash against whatever its in front of you.

The friction force, will pull you against the direction of movement, and slow you down will the car slows down.

5 0

3 years ago

What is the disadvantage of the solar energy?

vampirchik [111]

Answer:

In fact, there's only one notable disadvantage to solar power that I can think of. That disadvantage is that the sun doesn't shine 24 hours a day. When the sun goes down or is heavily shaded, solar PV panels stop producing electricity. If we need electricity at that time, we have to get it from some other source.

Explanation:

hope it helps mate

6 0

3 years ago

A _____ is a gas-like state of matter made of positive ions, free electrons, and neutral particles. Example: Sun or Neon lights

saveliy_v [14]

The correct answer is plasma.

When the temperature of a gas is very high, as it is, in extremely hot objects such as stars such as Sun,or incandescent or discharge lamps such as Neon lights, the gas exists in an ionized state.

At high temperatures, electrons gain enough energy to escape the attractive forces of the nucleus. When the electrons leave the atom, the atom becomes positively charged and these charged atoms are called ions.

At high temperatures, the matter can also contain neutrons which are neutral particles and are the constituents of the nucleus.

Thus the state at which matter can exist as ions, electrons, protons or neutrons is called plasma.

5 0

3 years ago

Read 2 more answers