which two options are examples of wave refracting?
A. Your image in a mirror
B. Light bending as it travels through glass.
C. A voice echo.
D. An object appearing broken when partly seen through water.

Answers

Answer 1
B is the answer I hope this helps

Related Questions

Can anyone please help meee!!!​

Answers

Answer:

The centripetal acceleration is given by  

a = v 2 r = 10 2 25 = 4   m s − 2

Using Newton's Second Law, the centripetal force acting is  

F = m a = 900 ⋅ 4 =3600 N

Explanation:

Plants are eaten by grasshoppers, which are eaten by mice, which are eaten by snakes.

Answers

Answer:

food chain / web lol? was this a question?

a girl is riding her bike and coasting down a hill. When she gets to the bottom of the hill, her bike continues to move without her pedaling. What type of energy is her bike using ?

a. potential
b. kinetic
c. solar
d. thermal

y’all, i have so many more questions

Answers

Answer:

Her bike is using kinetic energy

B

Explanation:

What are some of the similar features of position vs time and velocity vs time

Answers

I agree with the other comment

what were the difficulties ​

Answers

What do u mean about that
what do you mean about this

Calculate the weight in Newtons of a person who has a mass of 69 kg.

Answers

I believe the answer would be 676.65885 rounded to 676.7
just multiply by 10,

69 x 10= 690N

Stan walks 10km west to the grocery store. He shops then walks back 10 km east back to his house. What distance did he cover? What was his displacement?

Answers

Stan’s displaceent is 0 km because he ends his walk where he started.

If a 2 kg spring is compressed by exerting a force of 10 newtons a distance of 50 cm how much work is done?

Answers

convert cm into meters,
50/100=0.5m

work done= 10x0.5
=5J

we dont consider the weight of the spring as it acts downwards.

A layer of water Δx m thick which lies x m above the bottom of the tank will be rectangular with length 8 m. Using similar triangles, we can see that it will have widt of_____m

Answers

Answer:

x

Explanation:

The question relates to the energy required to pump water out of the

spout at the top of the triangular prism tank.

The width of the layer of water Δx thick is x m.

Reasons:

The location of the layer Δx m thick = x meters above the bottom

The length of the triangular (cross-section) prism tank = 8 meters

The length of the layer Δx thick layer = 8 meters

From the attached drawing of the cross-section of the tank, we have;

The height of the triangular tank cross-section = 3 meters

The length of the base of the triangular cross-section = 3 meters

By similar triangles, we have;

[tex]\dfrac{Height \ of \ Tank}{Base \ length \ of \ tank}= \dfrac{Height \ of \ layer \ with \ thickness \ \Delta x }{Width \ of \ layer \ with \ thickness \ \Delta x}[/tex]

Which gives;

[tex]\dfrac{3}{3} =\dfrac{x}{Required \ width}[/tex]

[tex]\dfrac{3}{3} =1 = \dfrac{x}{Required \ width}[/tex]

Required width × 1 = x

The required width = x m

Learn more here:

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A spring has a constant of 875 N/m. What hanging mass will cause this spring to stretch 4.5 m?

Answers

Answer:

8) A hanging 7.5 kg object stretches a spring 1.1 m. What is the spring constant? 1 . 1 66. 82 NIMO 9) A spring has a constant of 875 N/m. What hanging mass will cause this spring to stretch 4.5 m? Iouliply then divide 875 X 4. 2- - (4 04. 7919) 10) A spring with a spring constant of 25 N/m is stretched 65 cm. What was the force used? 11) A 25 N force stretches a spring 280 cm. What was the spring constant? 12) A 75 N force stretches a spring 175 cm. What was the proportionality constant? 8) 66.82 N/m 9) 401.79 kg 10) 16.25 N 11) 8.93 N/m 12) 42.86 N/m

Explanation:

A spring has a constant of 875 N/m. and the mass which will cause this spring to stretch 4.5 meters is 401.78 kg.

What is Spring constant?

The spring constant is a characteristic of a spring which is defined as the ratio of the force affecting the spring to the displacement which is caused by that force. The SI unit of spring constant is N.m⁻¹ (Newton per meter).

The spring constant is:

F = -k/ x

where, k is the spring constant

F denotes the force,

and x denotes the change in the length of the spring.

k = 875N/m

x = 4.5m

We know that

Kx = mg

m= kx/ g

m = 875 × 4.5/ 9.8

m = 401.78kg

Therefore, the mass which will cause this spring to stretch 4.5 meters is 401.78 kg.

Learn more about Spring constant here:

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Martha, a first-grade teacher, is worried that if doesn't stay In at work to grade papers her principal will think she is lazy She is also worried that if she stays late at work her partner will be angry. This of conflict is known as

Answers

The type of conflict Character vs self

Answer:

Character vs self

Explanation:

The reason is because Martha is thinking to much about the negative things and it is making her feel like she is fighting her own body for control.

help ;-;
Replace the pencil with an iron nail (Doc.19 in pic)


1. does the lamp glow?

2. does an electric current flow through the lamp?


3. Does the iron nail conduct the electric current?​

Answers

Answer:

all qn 1,2,3 have same answer ,. Yes,. hope it helps

How could I tell if an egg is hard boiled or raw explain using Newton's law of motion

Answers

Answer:

Explanation:

Newton's 2 nd law of motion tells that when equal torque is applied on object having higher moment of inertia , it will rotate slower .

Moment of inertia of boiled egg is higher because the whole egg rotates as s solid unit . Hence it will rotate slower or it rolls slower on an inclined surface .

In this way by applying Newton's law , we can identify raw or boiled egg .

a girl stands 1.5 m in front of a plane mirror, what is the distance of her image,and what are four image characteristics

Answers

Answer:

the distance to the image is 1.5 m

Explanation:

To find the position of the image let's use the equation of the constructor

       [tex]\frac{1}{f} = \frac{1}{p} + \frac{1}{q}[/tex]

where p and q are the distance to the object and the image, respectively, and f is the focal length.

In this case a plane mirror has a focal length at infinity, if we substitute in the equation

        1 / p = - 1 / q

         q = -p

therefore the distance to the image is 1.5 m

this image has some characteristics:

* It is a virtual image, this means that light rays do not pass through it

* It is a right image, that is, the image is in the same direction of the object.

* the magnification is 1, since the height of the image and the object are the same

* has the right - left direction reversed

What type of cells provide humoral immunity ?

Answers

Answer:

Antibody molecules that are secreted by plasma cells mediate the humoral immune response. The antigen that binds to the receptor of the B-cell antigen signals B cells and is internalized and transformed into peptides that activate the armed helper at the same time.

Explanation:

Answer:

B cells

Explanation:

Humoral immunity or humoural immunity is the aspect of immunity that is mediated by macromolecules found in extracellular fluids such as secreted antibodies, complement proteins, and certain antimicrobial peptides. Humoral immunity is named so because it involves substances found in the humors, or body fluids. It contrasts with cell-mediated immunity. Humoral immunity is also referred to as antibody-mediated immunity.

Which has the greater volume?
A. wood
B. white block
C. equal

Answers

Answer:

B.white block

hope it's the answer ....❤❤❤❤❤❤

It should be white block depends

a girl pushes her little brother down a snowy hill on a sled and he rides quickly to the bottom of the hill

which one of Newton's Laws is this ​

Answers

Answer:

Newton's First Law of Motion.

Explanation:

Inertia can be defined as the tendency of an object or a body to continue in its state of motion or remain at rest unless acted upon by an external force.

In physics, Sir Isaac Newton's First Law of Motion is known as law of inertia and it states that, an object or a physical body in motion will continue in its state of motion at continuous velocity (the same speed and direction) or, if at rest, will remain at rest unless acted upon by an external force.

In this scenario, a girl pushes her little brother down a snowy hill on a sled and he rides quickly to the bottom of the hill. The push from the little boy's sister is the external force acting on him and consequently, causing him to be in motion down the snowy hill.

What type of wave is created here?
A) longitudinal
B) transverse

Help me plssss!!!

Answers

Answer:

b

Explanation:

Answer:

this is a longitudinal wave!!!

Explanation:

because you can see the compressions and rarefactions.

Explain the Difference between genetic diversity and ecosystem diversity?

Answers

Answer:

1. Genetic diversity are the differences in DNA among individuals within a species or population while ecosystem diversity is the number or variety of ecosystems within a particular area.

2. Genetic diversity is the genetic material of microorganisms,  plants and animals contains information that  determines the characteristics of all species and  individuals that make up the diversity of the living  world while the ecosystem diversity is the enormous range of terrestrial and  aquatic environments on earth has been classified into a number of ecosystems.

An electrical generator creates electricity by

A) By spinning a turbine with kinetic energy

B) By using Gasoline

C) By exposing a coil of wire to a changing magnetic field

D) By Aligning the magnetic domains of the coil of wire

Answers

Answer:

C) By exposing a coil of wire to a changing magnetic field

Explanation:

An electrical generator creates electricity by exposing a coil of wire to changing magnetic field.

The generator converts mechanical energy which the energy due to the motion of a body and this produces electrical currents.

In the presence of a magnetic field electric current is induced within the circuit. The mechanical energy is obtained from an external source and sustained by the turning of the pistons with the set up. This keeps the generator in constant motion and through the magnetic fields.

Two charged objects originally felt 12N of attraction. One charge

is changed from 3C to 6C and their distance changes from 15cm

apart to 45cm apart. What is the new force of attraction?

Answers

Answer:

The new force of attraction will be [tex]F_{new}=2.67\: N[/tex]

Explanation:

The electrostatic force equation is given by:

[tex]F=k\frac{q_{1}q_{2}}{r^{2}}[/tex]

Where:

q(1) is the first charge, let's use this one to the 3 Cq(2) is the second charger is the initial distance (r = 0.15 m)

Then, the original force could express as:

[tex]F_{original}=k\frac{3q_{2}}{0.15^{2}}=12[/tex]

This force is 12 N.

Now, we know that q(1) changes its value to 6 C and the new distance between the charges is 0.45 m, which means:

[tex]F_{new}=k\frac{6q_{2}}{0.45^{2}}[/tex]

We can rewrite this force in terms of the original force.

[tex]F_{new}=k\frac{2\cdot 3q_{2}}{(3\cdot 0.15)^{2}}[/tex]

[tex]F_{new}=\frac{2}{9}k\frac{3q_{2}}{0.15^{2}}[/tex]

[tex]F_{new}=\frac{2}{9}F_{original}[/tex]

[tex]F_{new}=\frac{2}{9}12[/tex]

Therefore, the new force of attraction will be [tex]F_{new}=2.67\: N[/tex]

I hope it helps you!

Which force is an attractive force that is affected by the masses of objects?
A) tension force
B) magnetic force
C) normal force
D) gravitational force

Class: Physical Science B

Answers

Answer:

D) gravitational force

Most personal computers have a firewall and virus protection. Why are these
security programs needed?
A. They keep people from storing personal information on the
computer.
B. They keep harmful programs from entering the computer from the
Internet.
C. They keep analog signals from entering the computer from the
Internet.
D. They make sure digital information is sent out as a digital signal.

Answers

Answer:

B. They keep harmful programs from entering the computer from the

Internet.

Explanation:

Did the test !

Which changes with location?
1weight and gravity
2gravity
3weight
4mass ​

Answers

Answer:

fxfvhzsegjyfetvhtde ftgfrdedddfvygy

Explanation:

mass

what happens to your breathing rate when you.a) exercise.b) go to sleep

Answers

Answer:

When you are exercising, both your breating and heart rate go up, and it’s the opposite for sleep, when you sleep, your body slows down to rest itself.

Answer:

Explavyvyvuvubuvuvuvctcycuvrzedtcyvvy

Haha you did that to me it’s only fair

Tiny cell structure that carry out specific functions within the cell

Answers

Answer:

Organelles

Explanation:

I learned this in science.

most of the energy we use on earth comes from the sun—how does that energy(light and thermal)end up?

As ____energy in our food
As ____energy of wind or moving water
As ____energy that was our lights
As ____energy when we move around

Answers

most of the energy we use on earth comes from the sun—how does that energy(light and thermal)end up?

As ____energy in our food

While using heated car seats and running the fan on the car’s heater. What type of energy transfer does she use while staying warm in her car?

Answers

Answer:

She uses heat energy.

Explanation:

She uses heat energy. She transfers mechanical energy to heat energy wile staying in the car.

Which factor is a component of skill-related fitness?

Answers

Answer:

There are six skill-related fitness components: agility, balance, coordination, speed, power, and reaction time. Skilled athletes typically excel in all six areas. Agility is the ability to rapidly and accurately change the direction of the body.

Explanation:

Pls place the words in the right place I'll give brainless and the points!

Answers

Explanation:

you measure temperature in degrees celsius using a thermometer. Thermal energy is measured in joules. A larger volume of water will take longer to heat up but will store more energy than the smaller object. However, a smaller object will lose it's heat faster than a larger object. A cup of tea has less thermal energy than a swimming pool.

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