what is the difference between reflection and refraction? What changes and what does not change.

Answers

Answer 1

Answer:

Reflection involves a change in direction of waves when they bounce off a barrier. Refraction of waves involves a change in the direction of waves as they pass from one medium to another.

Explanation:


Related Questions

When an ice pack is applied to an injury, thermal energy from the injured area transfers to the ice, causing the blood
vessels within the area to constrict, which reduces the swelling.
How is thermal energy transferred in this scenario?
a conduction
b convection
c radiation

Answers

Thermal energy from the injured area transfers to the ice and the thermal energy transferred in this scenario is conduction.

What is Heat transfer by conduction?

Conduction heat transfer is the transfer of heat through matter such as  solids, liquids, or gases without bulk motion of the matter.

The  ice pack absorbs the heat energy without the actual movement of the molecules of the ice pack.

Thus, thermal energy from the injured area transfers to the ice and the thermal energy transferred in this scenario is conduction.

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Answer:

1. What is the best description of thermal energy?

B) Thermal energy is the energy in matter due to the movement of its atoms and/or molecules.

2. An athlete hurts their wrist. They put an ice directly on the wrist. In which direction is the thermal energy moving?

B) The thermal energy is moving from the wrist to the ice pack.

3. What happens when two substances with different temperatures come into contact?

B) Thermal energy is transferred from the warmer substance to the cooler substance.

4. Which is the best description of what happens when thermal energy is removed from a substance?

B) Its particles lose kinetic energy and move more slowly.

5. Which of the following is typically part of the knowledge base of research and development scientists working on heating devices?

A) substances and their properties

Explanation:

i just finished the quick check

Can someone please answer this, ill give you brainliest Would be very appreciated.

Answers

The order is followed as

photosynthesisDecompositionCombustionRespirationDiffusion

Answer:

See below ~

Explanation:

Done from left to right :

Box 1 : Photosynthesis

Box 2 : Respiration

Box 3 : Combustion

Box 4 : Decomposition

Box 5 : Diffusion

An object weighing 6 kg moving at a speed of 12 m / s was stopped by a force of 18 newton. At what time does the subject accelerate?​

Answers

Answer:

F ΔT = Δ(M V)

Change in momentum is equal to applied force* time

Δ(M V) = 6 kg * 12 m / s = 72 kg-m / s

ΔT = 72 kg-m/s / 18 kg-m/s^2 = 6 s     after 6 sec it will tend to rebound

Warm air is _____ dense than cold air, and warm air holds _____ moisture than cold air.

Answers

Answer:

Warm air is less dense than cold air, and warm air holds more moisture than cold air.

Explanation:

HOPE THIS HELPS AND HAVE A NICE DAY <3

2. What would be the acceleration of the clown at 5 s? (A) 1.6 m/s2 (B) 8.0 m/s2 (C) 2.0 m/s2 (D) 3.4 m/s2 3. After 12 seconds, how far is the clown from her original starting point? (A) 0 m (B) 10 m (C) 47 m (D) 74 m

Answers

Is there an image that goes with this question?

A ray gets successively reflected from two mirrors inclined at an angle of 40º. If the angle of incidence on the first mirrors is 60º, then the net deviation of this ray is -

a)40º
b)280º
c)80º
d)160º

Answers

The answer of the net deviation rah is 80 degrees 40+40=80.

The half-life of radium-226 is 1,600 years and the half-life of carbon-14 is 5,730 years. in one to two sentences, mathematically prove that the decay constant for radium-226 is larger than the decay constant for carbon-14.

please and thank you :)

Answers

Explanation:

-226 of 1600

-14 of 5730

-226×16÷100= -36.16

-14×57.3÷100= -802.2

The decay constant for radium-226 is larger than the decay constant for carbon-14.

What is decay constant?

Decay constant of radioactive substance is its probability of decay per unit time.

Decay constant for radium-226 is [tex]1.4*10^{-11} /sec[/tex]  and for carbon-14 is [tex]3.8*10^{-12} /sec[/tex].

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Ben created the table below to identify the roles of
different parts of the eye.
Part
Role
Cones
provide color visions through three
types of cells
Lens
focuses light to form an
upside-down, virtual image
Iris
adjusts the size of the pupil to
control the amount of light
receives image of the object and
contains cells that detect light
Retina
Which describes Ben's error?
There is a single type of cone cell.
The lens forms a real image.
The iris is a hole through which light passes.
The retina carries the signals to the brain.

Answers

Answer:

the answer is The lens forms a real image.

Explanation:

got it right on edge

15 PNTS
Select the correct answer. Which of the following is not produced in fission reactions?

A. greenhouse gases
B. heat
C. isotopes
D. neutrons

Answers

Answer:

A. Greenhouse gases

Explanation:

Because nuclear fission involves the modification of atoms.

Answer:

Greenhouse gases, because in nuclear fission, we are talking about modifying strictly atoms to get a reaction, therefore it would not make sense for greenhouse gases to be a reaction.

. Define density. How can you calculate density of an irregular shape solid body.

Answers

Answer:

a measure of the amount of information on a storage medium

Density= mass

                volume

it symbol is roh

Explanation:

To find density

we need the mass and volume we have to devide both of the

can someone help me and give me the right answer

Answers

Answer:

C. sedimentary

Explanation:

Answer:

Sedimentary

Explanation:

Igneous rock- A rock that's formed through the cooling and solidification of magma or lava.

Metamorphic rock- A rock that starts out as another rock and often has a striped appearance.

Volcanic rock- A rock that's formed from lava that erupted from a volcano.

Sedimentary is the only right answer. A Sedimentary rock is a rock thats made from the deposition of lots of pieces of eroded rock particles.

12. What are the components of the vector with a magnitude of 65.0 and a direction of 101.7°?
O (13.2, -63.6)
O (63.6, -13.2)
O (-63.6, 13.2)
O (-13.2, 63.6)

Answers

Answer:

V = 65 at 101.7 deg

Vx = V cos θ = 65 cos 101.7 = -13.2

Vy = V sin θ = 65 sin 101.7 = 63.6

The last option is correct

When friction occurs, which of the following types of energy is produced?
оооо
chemical energy
electromagnetic energy
heat energy
nuclear energy

Answers

Answer:

heat energy

Explanation:

Friction causes the molecules on rubbing surfaces to move faster, so they have more energy. This gives them a higher temperature, and they feel warmer.

hey!

Heat Energy is occurred when friction is produced .

We can relatively observe the warmth on surfaces due to friction too.

If the half-life of iodine-131 is 8.10 days, how long will it take a 50.00 g sample to decay to 6.25 g?

Answers

24.3 Days
50/2=25
25/2=12.5
12.5/2=6.25
3 days to decay to 6.25
3(8.1)=24.3

The time it will take to decay 6.25 grams is 24.4684 days.

What is Half life period?

A radioactive substance's half-life is often described as the amount of time it takes for one of its atoms to break apart or transform into another. Ernest Rutherford originally examined the theory in 1907. This is typically represented by the sign Ug or t1/2.

To make the concept clearer, let's use a radioactive element with an hour-long half-life.

Now according to the question the given values are :

T(1/2) for iodine-131 is 5.10 days,

[A]₀ for iodine-131 is 50 grams and,

[A] for iodine-131 is 6.25 grams.

T(1/2)=0.693/k

⇒8.10=0.693/k

⇒k=0.865 [tex]days^{-1}[/tex].

2.303 log [A]₀/[A]= kt

2.303 log(50.00/6.25)= 0.085×t

⇒t=1/0.085×2.303×log8

t=24.4684 days

Hence, the time it will take to decay is 24.4684 days.

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Good evening! Can someone please answer this, ill give you brainliest and your earning 50 points. Would be very appreciated.

Answers

Drinking Water - Direct
Our Eating Habits - Direct
Washing Clothes - Indirect

Answer:

Drinking water

Direct as we are achieving water directly by ourselves

Our foods

Indirect as foods contain water we are getting water indirectly from them

Washing clothes

Direct as direct contact of water is here

a table tennis ball launcher fires a tennis ball. what do we know about the impulse on both of the objects?

Answers

Answer:

As we know by Newton's III law that if an action force is applied on an object then the reaction force of same magnitude in opposite direction will act on the other.

So here when ball is shot using launcher then the force will be same on launcher as well as ball so we can say

now since force is of same magnitude for both both then we will have

so from above we can say that both ball and launcher will have same impulse but opposite in direction.

Now since ball will have less mass so here it will have more speed while launcher is heavy in mass so its speed is slow or very small as comapre to ball.

Which nucleus completes the following equation?
212 86 Rn-> 4 2 He+?

Answers

Answer:

A

Explanation:

208+4=212

84+2=86

The correct answer is A

Which statement about Sagittarius A* is true?

A: It is a quasar.

B: It orbits our sun.

C: It is 26,000 light-years away from earth.

D: It is set to subsume the earth in 100,000 years.

Answers

Answer:

It orbits our sun is the correct answer

Sagittarius A* is 26,000 light-years away from earth. Hence, option (C) is correct.

What is Sagittarius A*?

Sagittarius A* (Sgr A*), a supermassive black hole at the center of the Milky Way Galaxy with a mass equal to four million Suns, is seen in the constellation of Sagittarius. It is a powerful radio source that is a part of the larger Sagittarius A complex.

One of Chandra's largest observing missions to date led to these new discoveries. In order to obtain the first-ever X-ray photos and energy fingerprints of the multi-million degree plasma swirling around Sgr A*, a black hole with around 4 million times the mass of the Sun, Chandra made observations over the course of nearly five weeks in 2012.

Sgr A* is one of the very few black holes in the cosmos where we can really observe the flow of stuff close by, and it is only 26,000 light years away from Earth.

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A student says that the two terms speed and frequency of the wave refer to the same thing. What is your response?

Answers

Answer:

He is wrong!

Explanation:

Frequency refers to how many wave lengths pass in a second and speed is how fast the wave is traveling for example the speed of light goes really fast but has a mid-level frequency.

Hope this helps! ;-)

When current first leaves the battery, how much voltage does it have

Answers

Answer:

depends on the voltage of battery

Explanation:

for example if you connect a battery of 6V,6V will be  provided

What is the ratio between the initial and final kinetic energies of a car, if its velocity is increased by four times?
1:8
1:7
1:16

Answers

Let initial velocity be v

So

initial kinetic energy

KE=1/2mv²

Final velocity is four times v i.e 4v

Final kinetic energy

KE=1/2m(4v)²KE=1/2m(16v²)

Find ratio

1/2m(16v²):1/2mv²16v²:v²16:1

Or

1:16

Option C

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A student measures the weight of one bottle cap as 5.03 grams, so he calculates that the weight of 100
bottle caps will be 503 grams. The actual weight of 100 bottle caps is 495 grams. What is the student's percent error?percent error?

Answers

2489.85 or 98.4095% is the answer Method 1: Diagonal multiplication to calculate "What percent of 503 is 495"

For 503, our answer will be 495
For 100, our answer will be x
503*x = 100*495 (In Step 1 and 2 see colored text; Diagonal multiplications will always be equal)
x = 100*495/503 = 49500/503 = 98.4095
98.4095% of 503 is 495

Method 2: Same side division to calculate "What percent of 503 is 495"

For 503, our answer will be 495
For 100, our answer will be x
495/x = 503/100 (In Step 1 and 2, see colored text; Same side divisions will always be equal)
503/100 = 495/x or x/495 = 100/503
x = 495*100/503 = 49500/503 = 98.4095
98.4095% of 503 is 495

What is the wavelength a wave if it has a frequency of 7,143 Hz and a velocity of 1,151 m/s?

Answers

Wavelength = 0.16m to 2.dp

Wavelength = wave speed / frequency

= 1,151 ÷ 7,143

= 0.1611367773

Hope this helps!

What happens in the gray zone between solid and liquid?

Answers

Answer:

Hence, the transition has to cross the grey zone from liquid to solid or solid to liquid. This grey zone transition is crucial, including the intermolecular forces acting on the molecules and each atom, making the change in state from hot to cold and cold to hot.

Explanation:

Answer:

Hence from liquid to solid or solid to liquid the transition has to cross the grey zone. This grey zone transition is is very crucial which includes the inter molecular forces acting on the molecules and each atoms which makes the change in state from hot to cold and cold to hot.

Explanation:

this is based on ideal gas law PV=nRT.

Where P is pressure, V is volume, R is gas constant and T is temperature. Hence from liquid to solid or solid to liquid the transition has to cross the grey zone.

This grey zone transition is is very crucial which includes the inter molecular forces acting on the molecules and each atoms which makes the change in state from hot to cold and cold to hot.

The best example is ice crystal formation and water formation from ice crystal .

Hence the inter molecular force of attraction happens to be involved with changes in grey zone

PLEASE HELP ME!
For each equation, state the reaction type and then balance the equation.

___Na3PO4 + ___HCl → _ __H3PO4 + ___NaCl

___KClO3 → __O_KCl + ___O2

Answers

#1

Double displacement reaction

Balanced one

Na_3PO_4+3HCl—»H_3PO_4+3NaCl

#2

Decomposition reaction

Balanced one

2KClO_3—»2KCl+3O_2

name any two instruments based on archimede's principle

Answers

Two instruments based on Archimedes' principle

Lactometershydrometers

Explanation:

Archimedes' principle states -

when a body is partially or completely immersed in a fluid , the fluid exerts an upward force on the body which is equal to the weight of the fluid displaced by the body.

OR

when a body is immersed fully of partially in a fluid , it experiences an upward force that is equal to the weight of the fluid displaced by it.

Applicatios : Lactometer , hydrometer.

What is the mass of an object that accelerated at 5 m/s^2 and with a force or 45 N ?

Answers

The mass of the accelerated object is 9kg.

What is Newton's second law of motion?

According to this law, the force is equal to the product of mass of the object and its acceleration.

F =ma

Given is the force F =45 N and the acceleration is 5 m/s², then the mass will be

m = F/a

m = 45/5

m =9kg

Thus, the mass of the object is 9kg.

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A 5.0-kg block is pulled horizontally across a floor by a string attached to it with an acceleration of 2 m/s2. What is the tension in the string if the coefficient of sliding kinetic friction between the block and floor is 0.2

Answers

The tension on the string when the coefficient of sliding kinetic friction between the block and floor is 0.2 is calculated as 19.8N

What is the tension on the string?

The force acting on the block in the horizontal direction is given by:

F_net = ma

where F_net is the net force acting on the block, m is the mass of the block, and a is its acceleration.

The force of friction opposing the motion of the block is given by:

F(friction) = μKN

where μK is the coefficient of kinetic friction between the block and the floor, and N is the normal force acting on the block due to the floor.

Since the block is pulled horizontally, the normal force acting on the block is equal and opposite to the weight of the block, which is given by:

N = mg

where g is the acceleration due to gravity.

Therefore, the net force acting on the block is:

Fnet = T - F (friction) = ma

where T is the tension in the string.

Substituting the expressions for F (friction), N, and Fnet, we get:

T - μKmg = ma

Solving for T, we get:

T = ma + μKmg

Substituting the given values, we get:

T = (5.0 kg)(2 m/s^2) + (0.2)(5.0 kg)(9.8 m/s^2)

Simplifying, we get:

T ≈ 19.8 N

Therefore, the tension in the string is approximately 19.8 N.

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PLEASE HELP:


Calculate the net force on the box shown in the picture:


Determine the DIRECTION that this box will move once the force is exerted on it.


Determine whether this is a balanced or unbalanced force and what direction the box moves.

ill give u brainliest :)

Answers

Answer:

17N

Explanation:

the side with most net force is going to be deducted by the side with the least net force.

In the heat equation what does Q represent

Answers

The heat equation is Q = mcT


Q is the total amount of heat transferred to or from something.

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