Answer:
c
Explanation:
it is impossible to have negative acceleration
can someone mark the brainliest?
Answer:
I think I can have a good day
Answer:
What do you mean by your question?
How do I solve this problems
What is the relationship between an electromagnetic wave and the vibrations of the electric and magnetic fields it moves through?
O A. The vibrations of the fields move in a direction opposite to that of the wave.
O B. The vibrations of the fields are in the same direction but perpendicular to the motion of the wave.
O C. The vibrations of the fields are perpendicular to the direction of motion of the wave.
OD. The vibrations of the fields and wave motion are parallel to each other.
Answer:
c
Explanation:
The correct statement is: "The vibrations of the fields are perpendicular to the direction of motion of the wave."
To find the correct statement among all the options, we need to know more about the Electromagnetic wave.
What is electromagnetic wave?
Electromagnetic wave is a combination of electric field and magnetic field. It's a transverse wave and travels at the speed of light.How does the electromagnetic wave travel?
In the electromagnetic wave, both the electric field and magnetic field travel perpendicular to each other i.e. the vibration of both the fields are perpendicular to each other as well as perpendicular to the direction of propagation.Thus we can conclude that the option (C) is correct.
Learn more about electromagnetic wave here:
https://brainly.com/question/13874687
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If the incident angle of a light ray is 30 degrees to the normal, what will the reflected angle be?
17. A volleyball weighs about 300 grams.
Calculate the potential energy of a volleyball
that is in the air at a height of 15 m. (g = 9.8
m/s-). Round your answer to two decimals
and show the correct units of measure. Be
sure to convert units if necessary.
Answer:
PE = 44.1 J
Explanation:
Ok, to have the specific data, the first thing we must do is convert from grams to kilograms. Since mass must always be in kilograms (kg)
We have:
1 kilograms = 1000 grams.We convert it using a rule of 3, replacing, simplifying units and solving:
[tex]\boxed{\bold{x=\frac{gr*1\ kg}{1000\ gr}=\frac{300\ gr*1\ kg}{1000\ gr}=\frac{300\ kg}{1000}=\boxed{\bold{0.3\ kg}}}}[/tex]==================================================================
Earth's gravity is known to be 9.8 m/s², so we have:
Data:
m = 0.3 kgg = 9.8 m/s²h = 15 mPE = ?Use formula of potencial energy:
[tex]\boxed{\bold{PE=m*g*h}}[/tex]Replace and solve:
[tex]\boxed{\bold{PE=0.3\ kg*9.8\frac{m}{s^{2}}*15\ m}}[/tex][tex]\boxed{\boxed{\bold{PE=44.1\ J}}}[/tex]Since the decimal number, that is, the number after the comma is less than 5, it cannot be rounded, then we have this result.
The potential energy of the volleyball is 44.1 Joules.
Greetings.
How does the intensity of light change for a location depending on the season?
Answer:
The intensity of light can change with the time of the day, season, geographic location, distance from the equator, and weather. It gradually increases from sunrise to the middle of the day and then gradually decreases toward sunset; it is high during summer, moderate in spring and fall, and low during winter time.
Explanation:
translational movement with the tilt of the earth's axis we can explain the change in intensity that an area receives determined with the weather station.
In summer the axis points to the sun, which is why more intensity per unit area arrives. In winter the axis moves away from the sun intensity per unit area is less
The intensity of the radiation is defined by the relationship between the power on the irradiated surface
I = P / A
where I is the intensity, P is the power emitted by the sun and A is the area.
The intensity of the radiation that reaches it is around 1400 W / m² in the upper part of the Earth's atmosphere, this amount varies slightly when the planet passes from its furthest point from the sun to its closest point, that is, perihelion to aphelion.
The most important variation of this intensity is due to the fact that it has its axis inclined and the normal to the area changes in relation to the incident radiation during the translational movement around the sun.
In the summer the axis of the earth is inclined towards the sun, so the rays fall more perpendicularly, therefore their absorption over the area is maximum and the temperature rises.
In winter, the earth's axis is tilted away from the sun, so the rays they carry are distributed over a larger surface area and therefore less energy is absorbed per unit area and the temperature decreases.
In the spring and autumn seasons, the Earth's axis is almost vertical, so the absorption is intermediate and the temperature of the Earth is between the two maximums.
Using an analysis of the translational movement with the inclination of the earth's axis, we can explain the change in intensity received by an area determined with the weather station.
To learn more about solar intensity here: brainly.com/question/14375282
A small car and a large bus have the same kinetic energy, which is traveling faster?
a.) car
c.) same speed?
b.) bus
A balloon with a charge of 4.0 x 10 -5C is held a distance of 0.10 m from a second balloon having the same charge. Calculate the magnitude of the repulsive force.
Answer:
1438.4 N
Explanation:
Applying,
F = kqq'/r²................... Equation 1
Where F = Electrostatic force on the balloons, k = coulomb's constant, q = charge on the first balloon, q' = charge on the second balloon, r = distance between the two ballons.
From the question,
Given: q = q' = 4.0×10⁻⁵ C, r = 0.1 m
Constant: k = 8.99×10⁹ Nm²/C²
Substitute these values into equation 1
F = ( 4.0×10⁻⁵×4.0×10⁻⁵×8.99×10⁹)/0.1²
F = 14.384/0.01
F = 1438.4 N
The magnitude of the repulsive force will be 1438.4 N.Opposite charges repel each other by a force known as the repulsive force.
What is repulsive force ?The forces repel each other is known as the repulsive force.According to Coulomb's law, like charges repel each other.In Magnetism repulsive force between magnets of same orientation occurs.
The given data in the problem is;
q₁,q₂ is the charges =4.0 x 10 -5C 78
d is the distance = 0.10 m
F is the magnitude of the repulsive force=?
The magnitude of the repulsive force will be;
[tex]\rm F =\frac{ Kq_1q_2}{r^2} \\\\ \rm F =\frac{ 8.99 \times 1^9 \times 4.0 \times 10^-5 \times 4 \times 10^-5}{(0.10)^2} \\\\ \rm F =1438.4 N.[/tex]
Hence the magnitude of the repulsive force will be 1438.4 N.
To learn more about the repulsive force refer to the link;
https://brainly.com/question/807785
The electric potential 5.54 m from
a charge is -3680 V. What is the
value of the charge?
Include the sign, + or - .
(The answer is *10^-6 C. Just fill in
the number, not the power.)
Answer:
q = - 2.26 x 10⁻⁶ C
According to answering format:
q = - 2.26
Explanation:
The potential at a distance r from a charge q is given as follows:
[tex]V = \frac{kq}{r}[/tex]
where,
V = Potential = -3680 V
k = Colomb's Constant = 9 x 10⁹ Nm²/C²
r = distance = 5.54 m
Therefore,
[tex]-3680\ V = \frac{(9\ x\ 10^9\ Nm^2/C^2)q}{5.54\ m}\\\\q = \frac{(-3680\ V)(5.54\ m)}{9\ x\ 10^9\ Nm^2/C^2}[/tex]
q = - 2.26 x 10⁻⁶ C
What are the reasons for the establishment of UGA?
Answer:
In February 1784, just after the close of the Revolutionary War, the General Assembly of Georgia earmarked 40,000 acres of land to endow "a college or seminary of learning." The following year, Abraham Baldwin, a lawyer and minister educated at Yale University in New Haven, Connecticut, who had settled in Georgia
Explanation:
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Spring 1 has a small spring constant and spring 2 has a large spring constant. Which spring will stretch further when 100 g is added to them?
1
2
yeah it definitely 2 .:) :)
Which is a benefit of a scientific model?
A.) It provides a complete image of the concept it is modeling.
B.) It provides an accurate scale of the concept it is modeling.
C.) It provides an accurate visual representation of the texture and coloring of the concept it is modeling.
D.) It provides a useful understanding of the concept it is modeling.
Which weather event is most likely to occur if there are warmer than average ocean waters in the Pacific? Group of answer choices Flooding in the southern United States due to El Niño Wet conditions in the Pacific Northwest due to El Niño Weak trade winds due to La Niña Drought in the southern United States due to La Niña
Answer:
Flooding in the southern United States due to El Nino
Explanation:
An El Nino is said to be taking place during the period of a rise in the temperature of the water at the equatorial Pacific above average combined with a weaker than normal east winds.
The opposite condition is La Nina
The effects of an El Nino includes an higher amount of rainfall and can sometimes cause destructive flooding which is observed in the Southern United States from during the fall through spring
The weather that is most likely to occur if there are warmer than average ocean waters in the pacific is flooding due to El Nino in the southern United States.
Which nucleus completes the following equation?
Answer:
I think B but I could be wrong
Explanation:
What is the frequency of a wave traveling at 10 m/s with a wavelength of 2 m?
Answer:
5 Hz
Explanation:
Given:
Wave velocity ( v ) = 10 m / sec
wavelength ( λ ) = 2 m
We have to calculate Frequency ( f ) :
We know:
v = λ / t [ f = 1 / t ]
v = λ f
= > f = v / λ
Putting values here we get:
= > f = 10 / 2 Hz
= > f = 5 Hz
Hence, frequency of sound is 5 Hz.
What is the total kinetic energy of a hoop of radius 1 m and mass 2 kg that rolls at an
angular velocity of 1 rad/s?
Answer:
12
Explanation:
What is the total kinetic energy of a hoop of radius 1 m and mass 2 kg that rolls at an
angular velocity of 1 rad/s?
Why would African Americans like the song "Respect"?
A. It represented African Americans and their struggle for equality.
B. It represented African Americans and their success in achieving
equality.
C. It represented African Americans and their fight for African
independence.
D. It represented African Americans and their struggle to end slavery.
B. It represented African Americans and their struggle for equality.Answer:
Explanation:
Who can help me do some 8th grade Science if so i will mark you the brainliest and also no links
Answer:
yes I help what is the question
Warming up and cooling down should be dond before and after
Answer:
while changing the temperature
Pulling a boat forward into a docking area requires 157J of work. The boat must be pulled a distance of 5.3m. What is the force with which the boat is pulled?
Answer:
29.62 N.
Explanation:
Work = 157 J
Distance = 5.3 m
Force = ?
Work = Force * Distance
157J = Force * 5.3 m
157 J/ 5.3 m = Force
29.62 N = Force (or) Force =29.62 N
What is the mathematical relationship between current, resistance, and voltage?
Answer:
q=IR
Explanation:
q is voltage
I is current
R is resistance
why do plants on the floor of a rainforest often have reddish-colored leafs?
A, to help absorb as much sunlight as possible.
B, to camouflage themselves from predators.
C, to attract pollinators
D, To warn animals that the leaves are poisonous.
PLEASE HELP BY TODAY THANKS :)
Answer:
c i hope this helps
Explanation:
.- Una esfera hueca de acero a 28°C tiene un volumen de 0.4 m³, calcular a) ¿qué volumen final tendrá a -6°C en m³ y en litros? B) ¿Cuánto disminuyó su volumen en litros?
Answer:
Ve respuesta abajo.
Explanation:
Para hacer esto, podemos asumir que la presión es constante, pues es un proceso adiabatico, por tanto se aplica la ley de Charles a presión constante:
V₁/T₁ = V₂/T₂ (1)
De ahí podemos despejar V₂, ya que conocemos las condiciones iniciales de temperatura y volúmen, y la temperatura final:
V₂ = V₁ T₂ / T₁ (2)
Las temperaturas deben estar en grados Kelvin, y solo es cuestión de sumarle 273 al valor de la temperatura dada en °C:
T₁ = 28 + 273 = 301 K
T₂ = -6 + 273 = 267 K
El volúmen podemos pasarlo a litros ahora o al final. En este caso, podemos dejarlo en m³ como está y luego pasarlo a Litros. Resolviendo tenemos:
V₂ = 0.4 * 267 / 301
V₂ = 0.35482 m³Pasando este volumen a Litros, sabiendo que 1 m³ son 1000 L:
V₂ = 0.35482 * 1000
V₂ = 354.82 LFinalmente para saber cuanto disminuyó el volumen en Litros, pasemos el volumen inicial a Litros y luego se hace la resta con el volumen final:
V₁ = 0.4 * 1000 = 400 L
V₁ - V₂ = 400 - 354.82
V₁ - V₂ = 45.18 LEsto es lo que disminuyó. Espero te ayude.
Which type of electromagnetic radiation is used in cancer treatment?
A. X-rays
B. Visible light
C. Gamma rays
D. Infrared radiation
Answer:
C. Gamma Rays
Explanation:
A P E X
Answer:
C. Gamma rays
Explanation:
got it right
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What is the difference between heat and temperature?
Heat is caused by the sun, and temperature is caused by conditions in the atmosphere.
Heat is measured in calories, and temperature is measured in joules.
Temperature measures the motion of molecules, and heat is the energy of that motion.
Temperature is measured by a thermometer, and heat is measured by a barometer.
Answer:
Temperature measures the motion of molecules, and heat is the energy of that motion.
Explanation:
Answer:
Temperature measures the motion of molecules, and heat is the energy of that motion.
Explanation:
when you hear sounds made by a speaker, it is because air molecules have moved from the speaker to the ear
TRUE OR FALSE
refractive index of water is 1.3. calculate the speed of light in water.
Answer:
The speed of light is faster in water. The Refractive index of water is 1.3 and the refractive index of glass is 1.5. From the equation n = c/v, we know that the refractive index of a medium is inversely proportional to the velocity of light in that medium. Hence, light travels faster in water.
Answer:
[tex]2.31*10^{8} m/s[/tex]
Explanation:
Employ the formula attached below,
n = c/v
1.3 = (3.0*10^8)/ x
(solve for x)
x= (3.0*10^8) / 1.3
x= [tex]2.31*10^{8} m/s[/tex]
A ball is released from a height of 20 metres. Calculate; 1. The time it takes to fall 2. The velocity with which it hits the ground
Answer:
Final velocity of ball = 20 m/s
Explanation:
Given:
Height when ball released = 20meter
Find;
Time taken to fall
Final velocity of ball
Computation:
Initial velocity of ball = 0 m/s
Acceleration due to gravity = 10 m/s²
Using equation of motion;
S = ut + (1/2)(g)(t²)
20 = (0)(t) + (1/2)(10)(t²)
20 = 5(t²)
(t²) = 20 / 5
(t²) = 4
Time taken to fall = 2 second
V = u + at
V = 0 + (10)(2)
Final velocity of ball = 20 m/s
Which change would create light?
A. An electron in an atom jumping from a lower energy state to a higher one.
B. Two electrons from the same atom colliding
C. An electron in an atom jumping from a higher energy state to a lower one.
D. Two electrons from two different atoms colliding.
Answer:
Im not 100% sure but i think the answer is A. An electron in an atom jumping from a lower energy state to a higher one.
Explanation:
lmk if its wrong
A wave is moving at 300m/s and has a frequency of 25Hz, what is the wavelength?
Answer:
12 metre
Explanation:
Wavelength = Velocity / Frequency
Wavelength = 300m/s / 25 Hz
Wavelength = 12 metre
