Answer:
Therefore, when a light ray traveling through air enters water or glass it slows down, refracts, and bends toward the normal line. ... For example, when light goes from glass or water to air, it speeds up. Refraction changes how objects look.
Explanation:
The light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.
How light and water affects the speed of the light?Light is slowed down in transparent media such as air, water and glass. The ratio by which it is slowed is called the refractive index of the medium and is always greater than one.Because of the physical differences in the makeup of the materials light actually travels slower through water and glass. Speed of light in a vacuum and air = 300 million m/s or 273,400 mph. Speed of light in water = 226 million m/s or 205,600 mph. Speed of light in glass = 200 million m/s or 182,300 mph.The light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.
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A racing car can complete an 800 m long lap in 14 s. What is the speed of the
car?
Answer:
57.1 m/s
Explanation:
Speed = Distance/Time
Speed = 800/14
Speed = 57.1 m/s (3sf)
7
Select all the correct answers.
The distance from Earth to the moon is 384.400 kilometers. What is this distance expressed in scientific notation?
Answer:
3.844 x 10 to the 5th power
Explanation:
(01.06 LC)
When is equilibrium reached? (5 points)
a
When supply is greater than demand
b
When demand equals supply
С
When supply is less than demand
d
When demand and supply both change
Answer:
Equilibrium is reached when demand equals supply.
Explanation:
Demand is the amount that consumers want and can buy of a certain product or service in a specific period of time and at a certain price. On the other hand, the supply is the amount that producers want and can sell of a certain product or service in a specific period of time and at a certain price.
In market equilibrium, the quantity demanded of the product or service equals the quantity supplied, so the price also equals. In other words, when market equilibrium is reached, demand and supply are the same, with their corresponding equilibrium price and quantity.
Two situations can occur:
When the quantity demanded is greater than the quantity supplied, the market is in a situation of excess demand. On the other hand, it may happen that the price at which the products are being offered is greater than the equilibrium price and the quantity supplied is greater than the quantity demanded. Then there is an excess supply.Equilibrium is reached when demand equals supply.
A quantity that has magnitude & direction is called
Explanation:
VECTORS DEF: A vector is a quantity that has both magnitude and direction.
A ball is released from rest at the top of a ramp and rolls with an acceleration of 0.5 m/s2 for 10 seconds. How far does it travel during this time?
Answer:
the ball travels 0.85 miles per second
Explanation:
Answer:
0.85
Explanation:
Mrs. Ernest wants to know how much light her daisies need. She places one pot of daisies under a sunlamp and another pot of daises on a windowsill. Each day she gives both plants the same amount of water. Which term BEST describes the amount of water given to the plants each day?
Answer:
Control Variable
Explanation:
A control variable is a variable that is held constant throughout the cause of an experiment, in order to test accurately the relationship between the dependent and the independent variables. The control variable, which is amount of water needed by the plants in this case, has the property of affecting the growth of the daisies, hence if it is not held constant, the result of the experiment might not be accurately attributed to the light source alone.
Therefore, to say with certainty that the difference seen in both categories of plants was from the difference in lighting alone, other variables (amount of water, type of soil, temperature etc.) has to be held constant
WHO CAN ANSWER BOTH 14 and 15 WITH UNITS ILL PUT U AS BRAINLEST!
Answer:
14. V=8
15. V=40
Explanation:
simplifying:
14. 4 32/8
V=8
15. 20 1000/50
V=40
In scientific notation 674.3mm equals
Answer:
6.743 x 10² mm
Explanation:
Which scientist's idea what "gases are formed from tiny particles so small you can't see them. The particles are spread out into a certain area and move when people walk through them."
Answer:
Bernoulli
Explanation:
Hello! I took the k12 science quiz! I hope you get an A!
Have a blessed day! :)
Bernoulli was the scientist who gave the idea that "gases are formed from tiny particles so small you can't see them. The particles are spread out into a certain area and move when people walk through them."
What is an ideal gas?It is an imaginary gas for which the volume occupies by it is negligible, this gas does not exist in a practical situation and the concept of an ideal gas is only the theoretical one,
Bernoulli was the scientist who gave the idea that "gases are formed from tiny particles so small you can't see them. The particles are spread out into a certain area and move when people walk through them."
The kinetic molecular theory of gases is stated via Bernoulli's principle. The hypothesis states that gas particles are tiny and separated from one another. But when things travel through them, they change from their position as a result of fluid dynamics.
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Why is the handle made of a different material than the rest of the pot?
Answer:
Hi there!
Your answer is:
The handle is made from a different material than the rest of the pot because you want to be able to safely move & touch the handle without getting burnt. The pot is made of conductors, like metal, to help it get hot quickly and cook evenly. You need to be able to touch the handle without being in danger, so the handle is made of an insulator, like wood, which doesn't get hot easily
I hope this helps!
Answer: the handle is made up of different material than the rest of the pot because the handle can conduct heat into your hand if its the same material.
Describe what happens to the water molecules as heat energy is added and the water changes from solid to liquid to gas
Answer:
Explanation:
Adding heat can cause ice (a solid) to melt to form water (a liquid). Removing heat causes water (a liquid) to freeze to form ice (a solid). When water changes to a solid or a gas, we say it changes to a different state of matter. Even though the water's physical form changes, its molecules stay the same.
The atomic mass tells us how many______
and _______
an element has.
A. protons and electrons
B. protons and neutrons
C. electrons and neutrons
Answer:
A
The atomic mass tells us how many protons and electrons an atom has.
The answer is A.
Please help!!
If you move 3 meters East and move 4 meters north what is the distance and what is the displacement?
Answer:
Si un objeto se mueve en relación a un marco de referencia (por ejemplo, si una profesora se mueve a la derecha con respecto al pizarrón, o un pasajero se mueve hacia la parte trasera de un avión), entonces la posición del objeto cambia. A este cambio en la posición se le conoce como desplazamiento. La palabra desplazamiento implica que un objeto se movió, o se desplazó.
Explanation:
El desplazamiento se define como el cambio en la posición de un objeto. Se puede definir de manera matemática con la siguiente ecuación:
\text{desplazamiento}=\Delta x=x_f-x_0desplazamiento=Δx=x
f
−x
0
start text, d, e, s, p, l, a, z, a, m, i, e, n, t, o, end text, equals, delta, x, equals, x, start subscript, f, end subscript, minus, x, start subscript, 0, end subscript
x_fx
f
x, start subscript, f, end subscript se refiere al valor de la posición final.
x_0x
0
x, start subscript, 0, end subscript se refiere al valor de la posición inicial.
\Delta xΔxdelta, x es el símbolo que se usa para representar el desplazamiento.
Debemos ser cuidados al usar la palabra distancia, ya que hay dos maneras de usar el término en física. Podemos hablar acerca de la distancia entre dos puntos, o podemos hablar de la distancia recorrida por un objeto.
La distancia se define como la magnitud o el tamaño del desplazamiento entre dos posiciones. Observa que la distancia entre dos posiciones no es la misma que la distancia recorrida entre ellas.
Es importante darse cuenta que la distancia recorrida no tiene que ser igual a la magnitud del desplazamiento (es decir, la distancia entre dos puntos). De manera específica, si un objeto cambia de dirección en su trayecto, la distancia total recorrida será mayor que la magnitud del desplazamiento entre esos dos puntos. Ve los ejemplos resueltos a continuación.
Ina shoots a large marble (Marble A, mass: 0.08 kg) at a smaller marble (Marble B, mass: 0.05 kg) that is sitting still. Marble A was initially moving at a velocity of 0.5 m/s, but after the collision it has a velocity of −0.1 m/s. What is the resulting velocity of marble B after the collision? Be sure to show your work for solving this problem along with the final answer.
Answer:
2.4 m/s
Explanation:
Momentum is conserved.
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
(0.08 kg)(0.5 m/s) + (0.05 kg)(0 m/s) = (0.08 kg)(-0.1 m/s) + (0.05 kg) v
0.04 kg m/s = -0.08 kg m/s + (0.05 kg) v
0.12 kg m/s = (0.05 kg) v
v = 2.4 m/s
The law of____suggests that the orbit of planets is not circular but____.
A student planted bean seeds in two cups and placed the cups on a sunny windowsill. One cup was given 10 mL of water and the other cup was given no water. What are two things that should be kept constant in this experiment?
Answer: The water and sun.
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____________ occurs when heat is transferred into an object through motion or movement; an example would be boiling water. a conduction b convection c radiation d heat
Its a Conduction NO FOR REAL ITS A
Answer:
c, convection
Explanation:
edge 2020
a mountain biker cycling a trail traveling at 5.4 m/s begins to slow down when she notice a wooden bridge ahead has flooded. if she begins braking when she is 15.0 m from the bridge and comes to a stop just before reaching the bridge, how long did it take her to stop ?
Answer:
t = 5.56 s
Explanation:
In order to calculate the time interval taken by the mountain biker to come to a stop, we will use third equation of motion and first find the deceleration:
2as = Vf² - Vi²
where,
a = deceleration = ?
s = distance = 15 m
Vf = Final Velocity = 0 m/s
Vi = Initial Velocity = 5.4 m/s
Therefore,
2a(15 m) = (0 m/s²) - (5.4 m/s)²
a = - 0.972 m/s²
Now, we use 1st equation of motion:
Vf = Vi + at
therefore,
0 m/s = 5.4 m/s + (-0.972 m/s²)(t)
t = (5.4 m/s)/(0.972 m/s²)
t = 5.56 s
The time taken should be t = 5.56 s
Calculation of the time taken:here we used the third equation of motion
But first we determine the deceleration.
We know that
2as = Vf² - Vi²
here,
a = deceleration = ?
s = distance = 15 m
Vf = Final Velocity = 0 m/s
Vi = Initial Velocity = 5.4 m/s
So,
2a(15 m) = (0 m/s²) - (5.4 m/s)²
a = - 0.972 m/s²
Now, we use 1st equation of motion:
So,
Vf = Vi + at
0 m/s = 5.4 m/s + (-0.972 m/s²)(t)
t = (5.4 m/s)/(0.972 m/s²)
t = 5.56 s
Hence, The time taken should be t = 5.56 s
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A stunt man projects himself horizontal from a height of 60m. He lands 150m away from where he was launched. How fast was he launched?
A.) 54.87 m/s
B.) 43.98 m/s
C.) 47.46 m/s
D.) 42.87 m/s
Answer:
D) 42.87 m/s
Explanation:
First, find the time it takes him to land. Given in the y direction:
Δy = 60 m
v₀ = 0 m/s
a = 9.8 m/s²
Find: t
Δy = v₀ t + ½ at²
60 m = (0 m/s) t + ½ (9.8 m/s²) t²
t = 3.5 s
Next, find the speed needed to travel the horizontal distance in that time. Given in the x direction:
Δx = 60 m
a = 0 m/s²
t = 3.5 s
Find: v₀
Δy = v₀ t + ½ at²
150 m = v₀ (3.5 s) + ½ (0 m/s²) (3.5 s)²
v₀ = 42.87 m/s
Which of the following did the doll experiment not suggest?
A. African Americans attributed more positive characteristics to the white dolls.
B. African Americans had feelings of inferiority because of school segregation.
C. African Americans preferred to play with the white dolls when given a choice.
D. African Americans felt more secure and positive because of school segregation.
Answer: I do believe the answer is D if not then sorry and let others know in the comment section
The doll experiment did not suggest the African Americans felt more secure and positive because of school segregation. The correct option is D.
What is school segregation?School segregation in the United States is the segregation of students based on their colors and caste. An institution can be predominantly owned by the black and only black students can study into it.
The Americans who are black belonged to the African continent. They felt more safety and secure by studying into this segregated school.
Thus, the correct option is D.
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Position-Time Graph
30
Position (m)
10-
8)
Time (s)
The graph above represents the motion of a car. Based on the graph, the car is most
likely-
A) driving up a steep hill
B) speeding up
C) driving at constant speed
D) decelerating
Answer:
Option (C)
Explanation:
From the graph attached,
Position of a car is changing with time.
Let the two points (1, 5) and (2, 10) define the positions of a car at the different moment of time.
Since, speed = [tex]\frac{\text{Distance traveled by the car}}{\text{Time taken}}[/tex]
= [tex]\frac{10-5}{2-1}[/tex]
= 5 meter per second
Speed of the car = slope of the line on the graph
Since slope of the line is constant, speed of the car will be constant.
Therefore, Option (C) will be the answer.
Explain what major mistake producers made when editing the battle scenes for the movie Star Wars
Answer: Air
Explanation:
Roffns dn b bdd
A ball rolling down a ramp accelerates from 0 m/s to 40 m/s in 10 seconds. What is its acceleration?
Answer:
4
Explanation:
you have to divide the velocity by time so 40 divided by 10 and the answer should be 4
Answer:
Its acceleration is 4 m/s^2.
What are a few questions Civics can help you answer?
Answer:
go on Quizlet they mosly have answers for civics
Explanation:
a chemical reaction a temperature change may occur because of the breaking or formation of chemical bonds that release excess energy. Since there is a change in temperature why wouldn't this reaction be considered a physical change instead of a chemical change ?
Answer:
well, a chemical change will have to have something about its physically feature to be changed and it cannot be undone, say you burned wood, thats a chemical change as you cannot unburn it or remove the markings of the burn
:
HEY CAN ANYONE HELP ME OUT IN DIS RQ!!!!!!
Answer:
40 laps
Explanation:
400/10
40
PLS MARK ME AS THE BRAINLIEST
What forces come in pairs? Give an example help ASAP
Select ALL that apply.The displacement method of measuring volume:
A. is the only way to measure volume.
B. can be used to measure the volume of solids.
C. can yield inaccurate results.
D. is always accurate.
E. is not affected by solubility.
Answer:
Explanation:
C. Can be used to measure the volume of solids
If I was of help mark as brainliest I am 1 short
Answer:
is not always accurate and may yield incorrect results if the matter is soluble in liquid.
1. what is the displacement of the car between 0s and 24 s?
2. what is the distance of the car between 0s and 24s?
Answer:
1). Displacement = 24 m
2). Distance = 28 m
Explanation:
We will use the concept that distance is a scalar quantity and displacement is a vector quantity.
1). Displacement of the car between 0 s and 24 s
Displacement = distance between origin (0, 0) and a point on x - axis (24, 0)
= 24 - 0
= 24 meters
2). Distance traveled by the car = Distance traveled by the car on the ramp
= Distance traveled on the tracks (AB + BC + CD)
AB = [tex]\sqrt{6^2+8^2}[/tex]
= [tex]\sqrt{36+64}[/tex]
= [tex]\sqrt{100}[/tex]
= 10 m
BC = 16 - 8
= 8 m
CD = [tex]\sqrt{8^2+6^2}[/tex]
= 10 m
Therefore, distance traveled by the car = 10 + 8 + 10
= 28 m
Answer:
1). Displacement = -12 m
2). Distance = 12 m
Explanation:
This protects the surrounding environment, human beings, and the
reactor itself from radiation,
Answer:
renewable sources
Explanation:
