Are there conditions under which the incident light ray undergoes reflection but not transmission at the boundary? if so, then what are those conditions?

Mercury, Venus, Earth, Mars. Terrestrial, rocky : 11

The spinning of a planet on its axis, causing day and night :9

A force of attraction that keeps planets orbiting the sun : 7

A group of objects that orbit a star : 8

The orbit of a planet around the sun. On Earth, one year : 10

The idea of that the Earth and planets orbit the sun. A sun-centered view : 6

A rock that has entered Earth's atmosphere, leaving a streak of light in the night sky : 13

Jupiter, Saturn, Uranus, Neptune. Gas giants : 12

The theory the universe came forth from a single spot in an enormous explosion: 1

Huge clusters of stars, gas, and dust bound by the force of gravity: 8

The group of many stars along with interstellar gases, rocks and dust material.

Thus, the numbers are added in front of the sentences.

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The forces necessary for calculating the total force are Fp and Fg. The correct option is d.

The force of attraction felt by a person at the center of a planet or Earth is called as the gravity.

The gravitational force, Fg is the attractive force exerted by the Earth on the object that is equal to the mass of the object times the gravitational acceleration.

Emmett is lifting a box vertically. There are only vertical forces acting on the box.

The vertical force must counteract the weight of the object, is the upward force applied on the object.

Thus, the forces necessary for calculating the total force is Fp - Fg.

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The total distance covered by the locomotive (toy) during the first and second journey is 10500 meters.

D) The answer is not given in the Options.

Note that: Speed/velocity is distance traveled per unit time.

Speed = Distance ÷ time

Distance = velocity × time

Given that;

For the first journey,

For the second journey,

Distance covered in the first journey

Distance = velocity × time

Distance = 25m/s × 300s

Distance = 7500m

Distance covered in the second journey

Distance = velocity × time

Distance = 10m/s × 300s

Distance = 3000m

Total distance covered will be;

Total Distance = Distance covered in the first journey + Distance covered in the second journey

Total Distance = 7500m + 3000m

Total Distance = 10500m

Therefore, the total distance covered by the locomotive (toy) during the first and second journey is 10500 meters.

D) The answer is not given in the Options.

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Answer:

this is formula

Explanation:

Sherry who says one factor is the length of the path of sunlight is correct.

There are two main factors which affects light scattering, and they include the following;

length of the path of sunlight is equivalent to wavelength of the light.

Thus, we can conclude that Sherry who says one factor is the length of the path of sunlight is correct.

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Answer:

D3

Explanation:

To determine the note, you will have to find the frequency of that sound wave

frequency is no. of cycles or oscillation that occurs per second

so according to the question for 3 oscillations, it took 20ms which is 20 × 10^-3 seconds then for 1 second that'd be

3×10^3 ÷ 20 = 150 Hz

then the note corresponding to frequency is D3

Answer:

g = -3.143 m/s²

Explanation:

To determine acceleration due to the gravitational force, it can be used the following formula:

v = v₀ + gt, where:

v₀ is the initial velocity;

g is acceleration due to gravity

t is the time to return to the point of origin

Answer:

Bullying in the schools has negative effects on individual students and on the school climate as a whole. Bullying can cause long-term problems for both the victims of bullying and the bullies themselves. To explore the effects of bullying on adolescents, we will define bullying, identify the characteristics of bullies and victims, outline the extent and consequences of bullying, and present resources for further information and assistance.

Bullying is any behavior that is initiated by one or more students against a victim or victims that causes physical or psychological intimidation. Bullying behaviors can be classified as either direct (such as teasing, threatening, hitting, or stealing) or indirect (such as rumor spreading or social isolation). Boys typically employed direct methods of bullying, while girls tend to use in direct methods. Either way, behaviors must occur repeatedly overtime to be classified as bullying.

Characteristics of Bullies and Victims

There are specific behaviors that bullies tend to exhibit. The bullies often need to feel powerful and in control. They may feel no remorse when they inflict injury and suffering on others. Bullies tend to defy authority and are likely to break school rules. They seem to have little anxiety and appear to possess high self-esteem. Students who come from homes characterized by physical punishment tend to be more likely to exhibit these types of behaviors.

Victims also tend to exhibit specific characteristics. They are often anxious, insecure, cautious, and have low self-esteem. Victims tend to be socially isolated, and may lack social skills and friends. Because they tend to be weaker than their peers, either physically or socially, victims rarely retaliate against bullies. Students who have close ties with their parents/guardians or who have overprotective parents/guardians are more likely to be victimized by bullies.

The angular speed can't be determined without knowing the rotational inertia of the disk. The correct option is D.

 It is the quantitative measure of the inertia when a body is rotating.

Given, radius of disk R= 0.5 m, Force F=2N, then torque developed will be

τ = F x R = 2 x 0.5 =1N..m

If m is the mass of disk, the rotational moment of inertia about center of disk is

I = mR²/2 = m(0.5)²/2 = m/8 kg.m²

The angular acceleration is α =τ/I = 1/(m/8) =8/m

Angular velocity ω =ω₀ +αt = 0+(8/m) x 1 =8/m rad/s

Thus, the correct option is D.

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The magnetic field strength at point 1 in the figure will be 6.67 ×10⁻⁵ T.

The number of magnetic flux lines on a unit area passing perpendicular to the given line direction is known as induced magnetic field strength .it is denoted by B.

The magnetic field strength is found as;

[tex]B = \frac{\mu_0I}{2r} \\\\ \mu_0 = 4 \PI \times 10^{-7}[/tex]

In the formula,I denote current, and r denotes the distance between the point and the current carrying wire and magnetic field due to current in the bottom wire.

At point 1, the net magnetic field is found as the sum of magnetic field due to current in the top wire.

[tex]\rm B_{net} = B1_+(-B_2)[/tex]

[tex]B = \frac{ 4 \PI \times 10^{-7}I}{2r} \\\\ \rm B_{net} = B_1_+(-B_2)\\\\ \rm B_{net} = \frac{4 \times \pi \times 10^{-7} \times 10}{2 \times \pi \times 0.02} -\frac{4 \times \pi \times 10^{-7} \times 10 }{2 \times \pi \times 0.06} \\\\\ \rm B_{net} = 6.67 \times 10^{-5} T[/tex]

Hence, the magnetic field strength at point 1 in the figure will be 6.67 ×10⁻⁵ T.

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Answer:

[tex]\huge\boxed{\sf P = 12,000 \ Pa}[/tex]

Explanation:

Force = F = 1200 N

Area = A = 0.1 m²

Pressure = P = ?

[tex]\displaystyle P = \frac{F}{A}[/tex]

[tex]\displaystyle P = \frac{1200 \ N}{0.1 \ m^2} \\\\P = 12,000 \ Pa\\\\\rule[225]{225}{2}[/tex]

Answer:

P=3750

Explanation:

P=F/A

P=1200N/0.1m²

Find the square root of 0.1

square root of 0.1=0.316622776601

Approximate it =0.32

P=1200N/0.32M

Cross multiple=1200N=P0.32M

divide both side by

3750=P, P=3750

Answer:

B

Explanation:

mass is the amount of matter present in any object or body.

here in the option b, it says they each contain the same amount of matter,

which means they each has the same mass.

A PUC test would be the most likely course of action for a chemist. It is the most effective method for figuring out how the components of gasoline impact the kinds of pollutants.

The vapors created by gasoline evaporation and the chemicals produced by gasoline combustion cause impurity in the air known as air pollution.

When gasoline is burned, it emits carbon dioxide, a greenhouse gas.

Hence, the chemist's most likely action would be to do a PUC test.

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For a pulley system is used in an auto repair shop to lift a 200 kg engine block 1.5 m out of a car, work is done during this process is mathematically given as

w=3000J

Generally, the equation for work done is mathematically given as

W=mgh

Therefore

W=200*10*1.5

w=3000J

In conclusion, work done

w=3000J

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Answer:

2.26l

Explanation:

From the general gas equation:

P1V1/T1  = P2V2/T2

Since pressure remained constant we can say:

V1/T1  = V2/T2

so to convert to kelvin add 273 to both temperature values then we can say:

1 m^3= 1000 L

2l=0.002m^3

Then;

0.002/308=V/348

V=(0.002/308)348

Final volume=0.002259m^3

=2.6l(1 decimal place)

Answer:

56.916  kg m/s

Explanation:

Convert g to kg        15.3 g =   .153 kg

.153 kg  *  372 m/s   = 56.916 kg*m/s

Answer:

900kJ

Explanation:

The formula to find the kinetic energy is :

[tex]E_k=\frac{1}{2} mv^{2}[/tex]

Here,

m ⇒ mass ⇒ 4500 kg

v ⇒ velocity ⇒ 20 m/s

Let us find it now.

[tex]E_k=\frac{1}{2} mv^{2}[/tex]

[tex]E_k=\frac{1}{2} *4500*20^{2}[/tex]

[tex]E_k=\frac{1}{2} *1800000[/tex]

[tex]E_k=900000J[/tex]

[tex]E_k=900kJ[/tex]

Answer:

12

Explanation:

avarage speed = total distance/total time

our total distance is 40km

the first 20km speed was 20km/h, so the time os 1 hour here

for the next 20km, we dont have the time, so let the time here be = x

so total time is x+1 km/h

and total distance is 40km

and the avarage is 24km/h

so =>

[tex] \frac{40}{1 + x} = 24[/tex]

solve for x to find the time in the second 20km

so x=0.6

then find the speed of the second 20km by diving the distance on time =>

[tex] \frac{20}{0.6} = 12[/tex]

so the speed in the second 20km is 12km/h

From the statement in the question, the resultant force is 3N downward.

The term resultant force refers to a single force that will an effect tat is the same as that of the system of forces acting together.

Thus, if the upward force is 15 N and the downward force is 18 N, the resultant force will be; 18 N - 15 N = 3N downward.

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Answer:

5161.26

Explanation:

5.09X1014=5161.26

Answer:

1.2 seconds

Explanation:

distance = ((final speed + initial speed) * time)/2

Here given:

Solving steps:

3.8 = ((0 + 6.4) * time))/2

3.8 = 3.2(time)

time = 3.8/3.2

time = 1.1875 seconds ≈ 1.2 seconds

Smaller stars, like our sun, die by ejecting their outer layers of gas into space, resulting in the formation of a planetary nebula.

A planetary nebula is formed when a red giant ejects its outer atmosphere. A white dwarf is the carbon core of a star that has lost its photosphere.

This results in a one-of-a-kind and breathtaking creation known as a planetary nebula.

Smaller stars, like our sun, die by ejecting their outer layers of gas into space over a 10,000-year period, leaving behind the star's heated core.

Radiation from the white dwarf causes the gas to shine, resulting in a one-of-a-kind and stunning creation known as a planetary nebula.

The carbon core of a red giant that has evacuated its photosphere as a planetary nebula is a white dwarf.

Hence, Smaller stars, like our sun, die by ejecting their outer layers of gas into space type of star will form a planetary nebula

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Answer:

Jupiter is the fastest whereas Venus is the slowest

White color light falls on white object , it will appears black because it absorbs all the colors of spectrum.

White color light falls on red object , it will appears red because it absorbs all the colors of spectrum except red.

White color light falls on blue object , it will appears blue because it absorbs all the colors of spectrum except blue.

Red color light falls on white object , it will appears Red.

Red color light falls on Red object , it will appears Red.

Red color light falls on Green object , it will appears black.

Green color light falls on white object , it will appears green.

Green color light falls on Red object , it will appears black.

Green color light falls on Green object , it will appears green.

Purple color light falls on white object , it will appears Purple.

Purple color light falls on Red object , it will appears black.

Purple color light falls on Blue object , it will appears black.

White light is the light from the sunlight incident on the surface to appear their color.

Thus, for each colored light and colored square, appearing color is find out.

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Answer:

the handle

Explanation:

The frequency of the radar wave is 4.166 Hz.

The wavelength is the distance between the adjacent crest or trough of the sinusoidal wave. The wavelength is the reciprocal of the frequency of the wave.

Wavelength λ = 1/f

A 0.12-meter-long electromagnetic (radar) wave is emitted by a weather station and reflected from a near by thunderstorm.

The radar wave travels double the distance 0.12 m.

λ = 2 x 0.12  = 0.24 m

Then, the frequency of the radar wave is

f= 1 / 0.24

f =4.166 Hz

Thus, the frequency of the radar wave is 4.166 Hz.

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Answer:

A quasar is an extremely luminous active galactic nucleus, powered by a supermassive black hole, with mass ranging from millions to tens of billions of solar masses, surrounded by a gaseous accretion disc.

Explanation:

first!

Photovoltaic cells are the most efficient means of converting solar energy to electricity. Option b is correct.

A cell is a voltage and current-producing device that consists of a single anode and cathode separated by an electrolyte.

One or more cells can make up a battery. One cell, for example, is one AA battery.

Light intensity on a solar cell is often measured in "suns," with one sun roughly equivalent to 1 kW/m².

Concentrated sunlight improves the ratio of current generated while the device is lighted vs when it is dark, hence enhancing output voltage and efficiency.

Photovoltaic cells are the most efficient means of converting solar energy to electricity.

Hence, option b is correct.

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The pitch of the sound is perceived to be lower when an object is approaching you while making a sound.

Sound is a type of vibration capable of propagating in a suitable media (e.g., air or water).

The sound waves are called acoustic waves and they have a well-defined frequency and amplitude.

In conclusion, the pitch of the sound is perceived to be lower when an object is approaching you while making a sound.

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