Answer: A.visible light
Explanation:
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 380 to 740 nanometers.
Final answer:
Humans can see the part of the electromagnetic spectrum known as visible light, which ranges from 380 nm to 740 nm in wavelength. (option A)
Explanation:
The part of the electromagnetic spectrum that humans can see is known as visible light. This is a small portion of the larger electromagnetic spectrum which also includes other types of waves such as radio waves, gamma rays, x-rays, ultraviolet light, infrared light, and microwaves.
The visible light spectrum for humans ranges from wavelengths of approximately 380 nanometers (nm) to 740 nanometers. Beyond the scope of human vision, other species can detect different parts of the spectrum; for example, bees can see ultraviolet light and some snakes can detect infrared radiation.
Lightning bolts occur when negative charges in clouds:
A. Flow positively to the ground
B. Flows negatively to the ground
C. Flows to the negatively charged clouds
D. cause thunder to sound
(PLEASE HELP) Georgia dropped a glass in the kitchen and it shattered. What happened?
A. A chemical change
B. A physical change
C. A chemical reaction
D. The destruction of matter
Answer:
A physical change
Explanation:
This is a chemical change because, the glass only changed in its form, not its composition. The glass is glass but in a form a shattered pieces of glass. This is not a chemical change because the glass did not change in its composition; this is not a chemical reaction because no other substance caused the glass to break. And, this is not the destruction of matter because matter cannot be destroyed.
The physical change has occurred in the glass dropped by Georgia in the kitchen. Option B is correct.
What is Physical change:The change in the shape, size of the object is considered as the physical change. Chemical change:The change in the constituting chemicals in the matter is called a chemical change. Here, the glass has been dropped and changed in the shape of the glass.Therefore, the physical change has occurred in the glass dropped by Georgia in the kitchen.
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What is created when charged particles are moving in a single direction and path?
I think it is Drift Velocity.
the substance dinitrogen monoxide is a molecule with 3 atoms?
options :
true
false
Answer:
True
Explanation:
You can find it with the abbreviation of N2O
some energy is free but other types must be bought true or false
Answer:
energy is free or can be bought
Explanation:
Its true
Answer:
The correct answer is true!
Explanation:
Have a horse-some day!!!!
-Alaska
6. Oxygen has an atomic number of 8. What can you
conclude from this fact?
a. An atom of oxygen weighs 8 grams.
b. An atom of oxygen has 4 protons and 4 electrons.
c. An atom of oxygen has 8 positrons.
d. An atom of oxygen has 8 protons.
Answer:
Explanation:
Oxygen has an atomic number of 8,
Then, it has eight electrons revolving round its nucleus.
And since it a neutral atoms.
Number of neutron ≈ number of electron
Number of proton = Number of electron.
Then, the number of proton is 8
So, we can find it mass number of molecular weight
Molecular weight = number of proton + number of neutron
Molecular weight = 8 + 8
Molecular weight = 16g/mol
So, the correct answer is D
An atom of oxygen has 8 protons.
On the electromagnetic spectrum, the waves with the shortest wavelength have the most energy.
True
False
Answer:
I believe it's True
Explanation:
The shortest the wavelength is the faster the molecules travel producing more energy.
How does Mr. Anderson define solubility in the video?
2. What is the solubility of talc in 100 mL of 25 °C water? Explain why talc has this solubility. 3. Describe how increasing temperature affects the solubility of solid and liquid solutes.
4. Why is there less oxygen in ocean water near the equator than in water at higher latitudes? 5. A factory discharges clean, warm water into a nearby stream. Fish keep dying in this part of stream. Explain why.
Solubility is the capacity of a solute to dissolve in a solvent. Warm temperatures often increase the solubility of solids and liquids, but reduce the solubility of gases like oxygen. This is why warmer ocean waters and artificially warmed waters can contain less oxygen, potentially leading to negative effects on aquatic life.
Explanation:In the video, Mr. Anderson defines solubility as the maximum amount of solute that can be dissolved in a specific amount of solvent at a given temperature. For instance, the solubility of talc in water at 25 °C is fundamentally none because talc is a mineral compound that does not interact with water molecules to any significant extent. Talc particles will simply settle to the bottom rather than dissolve.
The solubility of both solid and liquid solutes usually increases with temperature, although there are exceptions. The increase in kinetic energy that comes with higher temperatures allows solute particles to break apart more easily and become dispersed throughout the solvent.
Ocean water near the equator contains less dissolved oxygen than water at higher latitudes due to the effect of temperature on gas solubility. The higher temperatures near the equator decrease the solubility of oxygen, leading to lower concentrations. In the scenario of fish dying in the part of a stream into which a factory discharges clean, warm water, the likely cause is a decrease in the solubility of oxygen due to the temperature rise, leading to insufficient oxygen for the fish to survive.
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una bala de 20 g choca con un fango como se muestra en la figura y penetra una distancia de 6 cm antes de detenerse. calcule la fuerza de frenado f si la velocidad de entrada fue de 80m/s
Answer:
A 20g bullet collides with a mud as shown in the figure and penetrates a distance of 6cm before stopping. calculate the braking force f if the input speed was 80m/s
Explanation:
Given that,
A bullet of mass
M = 20g = 0.02kg
The bullet is fired into a mud initially at rest
The bullet penetrate a distance of 6cm in the mud
S = 6cm = 0.06m
The input velocity into the mud is 80m/s, this implies that, the initial velocity is 80m/s
U = 80m/s
So, the bullet stop after a distance of 6cm, so the final velocity is 0m/s
V = 0m/s
So, we need to find the braking force
Breaking force (F) is given as
F = ma
Where m is mass and 'a' is deceleration
So, we need to find the deceleration, using equation of motion
V² = U² + 2as
0² = 80² + 2 × a × 0.06
0 = 6400 + 0.12a
0.12a = -6400
a = -6400 / 0.12
a = - 53,333.33 m/s²
So, the negative sign shows that the bullet is decelerating
So, a = 53,333.33 m/s²
So, breaking force
F = ma
F = 0.02 × 53,333.33
F = 1066.67 N
The breaking force is 1066.67 N
In spanish
Dado que,
Una bala de masa
M = 20 g = 0.02 kg
La bala se dispara en un lodo inicialmente en reposo
La bala penetra una distancia de 6 cm en el barro.
S = 6 cm = 0.06 m
La velocidad de entrada al lodo es de 80 m / s, esto implica que la velocidad inicial es de 80 m / s
U = 80 m / s
Entonces, la bala se detiene después de una distancia de 6 cm, por lo que la velocidad final es de 0 m / s
V = 0 m / s
Entonces, necesitamos encontrar la fuerza de frenado
La fuerza de ruptura (F) se da como
F = ma
Donde m es masa y 'a' es desaceleración
Entonces, necesitamos encontrar la desaceleración, usando la ecuación de movimiento
V² = U² + 2as
0² = 80² + 2 × a × 0.06
0 = 6400 + 0.12a
0.12a = -6400
a = -6400 / 0.12
a = - 53,333.33 m / s²
Entonces, el signo negativo muestra que la bala se está desacelerando
Entonces, a = 53,333.33 m / s²
Entonces, fuerza de ruptura
F = ma
F = 0.02 × 53,333.33
F = 1066.67 N
La fuerza de ruptura es 1066.67 N
A ray diagram without the produced image is shown.
A car acting as an object in front of a biconvex lens between F and 2 F on the object side of the lens. There is a light ray parallel to the principal axis that is bent through F on the image side of the lens. There is a ray straight through the center of the lens. The rays intersect below the x axis further than 2 F away from the lens and farther from the principal axis than the object is tall.
Which describes the image produced by the lens?
upright and real
inverted and real
smaller than the object and upright
smaller than the object and inverted
A car acting as an object in front of a biconvex lens between F and 2 F on the object side of the lens. There is a light ray parallel to the principal axis that is bent through F on the image side of the lens. There is a ray straight through the center of the lens. The rays intersect below the x axis further than 2 F away from the lens and farther from the principal axis than the object is tall.
The image produced by the lens is (b) inverted and real
Explanation:
A real image occurs where the rays converge.
Real images can be produced both by the concave mirrors or converging lenses, but the condition is that the object of consideration is always placed far away from the mirror or the lens than the focal point, and thus the real image produced is inverted.
A car acting as an object in front of a biconvex lens between F and 2 F on the object side of the lens. There is a light ray parallel to the principal axis that is bent through F on the image side of the lens. There is a ray straight through the center of the lens. The rays intersect below the x axis further than 2 F away from the lens and farther from the principal axis than the object is tall.
The image produced by the lens is (b) inverted and real
Answer:
b
Explanation:
edge 2021
What would happen if you shone a ray of light at right angles to the surface of the glass block?
Answer:
it would reflect at a 90 degree angle
Explanation:
when light is shone onto glass, it will reflect the direction it is facing no matter what. right angles will shine it at a 90 degree angle if you shine light at the exact angle above it
Which of the following best represents a neutralization reaction?
a) acid + salt > base + water
b) acid + base > salt + water
c) water + salt > acid + base
d) acid + water > base + salt
Answer:
It’s B
Explanation:
Hope it helps
The equation that best represents a neutralization reaction is acid + base > salt + water. The correct option is b.
An acid and a base combine to generate a salt and water in a neutralization process.
Acids are chemicals that emit hydrogen ions (H+) in water, whereas bases emit hydroxide ions (OH-) in water.
When an acid and a base react, the acid's hydrogen ions join with the base's hydroxide ions to generate water (H2O). Simultaneously, the leftover ions from the acid and base combine to create a salt.
Thus, option b) acid + base > salt + water appropriately describes a neutralization reaction in which an acid and a base combine to form a salt and water.
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What is air resistance a form of? Define air resistance
Answer:
By definition, air resistance describes the forces that are in opposition to the relative motion of an object as it passes through the air. These drag forces act opposite to the oncoming flow velocity, thus slowing the object down.
Explanation:
Air resistance is a form of frictional force that slows down the motion of objects as they travel through the air.
Explanation:In the subject of physics, air resistance is a form of frictional force that slows down the motion of objects as they travel through the air. It is caused by the interaction between the moving object and the molecules in the air.
For example, when an object falls through the air, air resistance acts in the opposite direction of its motion, causing it to fall slower than it would in a vacuum. Similarly, when a car moves forward, it pushes the air in its direction of motion, which creates air resistance that opposes the car's movement.
Which of the following is an example of a push?
A. Throwing a baseball
B. Doing chin-ups
C. Reeling in a fish with a fishing pole
D. Opening a car door from the outside.
Answer:
throwing a baseball.
Explanation:
chin ups are also called pull ups
reeling in a fish is pulling it in
opening a car door is pulling it open
What event led to the birth of the sun
Explanation:
A massive concentration of interstellar gas and dust created a molecular cloud that would form the sun's birthplace. Cold temperatures caused the gas to clump together, growing steadily denser, gradually to form the sun.
The birth of the sun and other stars is attributed to a process called stellar nucleosynthesis, which occurs within vast clouds of gas and dust known as nebulae.
What events led to it?The specific event that led to the birth of the sun is commonly referred to as "solar nebula hypothesis" or "solar nebula theory and is based on current understanding and observations of star formation and the early solar system.
The solar nebula hypothesis has it that :
About 4.6 billion years ago, a region of space within the Milky Way galaxy experienced the gravitational collapse of a massive molecular cloud. This molecular cloud was composed mostly of hydrogen and helium, along with trace amounts of other elements.
The gravitational collapse led to an increase in density and temperature at the center of the cloud, resulting in the formation of a protostar.
The protostar is the early stage of the sun, where nuclear fusion reactions have not yet initiated.
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If a positive metal sphere touches a negative metal sphere what will happen?
Kinetic Energy - What does it depend on?
The greater the ______________ of a moving object, the _____________________ it has.
Help!
Answer:
faster; more kinetic energy
Explanation:
The potential energy an object has due to it position Is called _______ potential energy
Final answer:
The potential energy an object has due to its position is called gravitational potential energy. It is related to an object's height relative to a gravitational source, typically Earth, and increases with elevation. Another form, elastic potential energy, is stored in stretched or compressed objects.
Explanation:
The potential energy an object has due to its position is called gravitational potential energy. This type of energy is a function of an object's position relative to a source of gravitational force, usually Earth for problems encountered in middle and high school physics. Gravitational potential energy increases as the height of an object increases relative to a reference point, commonly ground level. For example, a book placed on a higher shelf has more gravitational potential energy compared to when it is on a lower shelf because it has the potential to do more work if it falls.
Another form of potential energy relevant in physics is elastic potential energy, which is stored in objects like springs and rubber bands when they are stretched or compressed. This energy is a function of the displacement and the stiffness of the object, as described by Hooke's Law.
Based on Kepler's third law of motion, what is the relationship between a planet's orbital velocity and its distance from the sun?
A)The greater the distance, the greater the orbital velocity.
B)Distance has no effect on orbital velocity.
C)As distance is cut in half orbital velocity decreases.
D)The greater the distance, the slower the orbital velocity.
Based on Kepler's third law of motion, the relationship between a planet's orbital velocity and its distance from the sun is
D)The greater the distance, the slower the orbital velocity.
Explanation:
A planet's orbital speed changes, depending on how far it is from the Sun. The farther it is from the Sun, the weaker the Sun's gravitational pull, and the slower it moves in its orbit.A planet's orbital speed changes, depending on how far it is from the Sun. The closer a planet is to the Sun, the stronger the Sun's gravitational pull on it, and the faster the planet moves. The farther it is from the Sun, the weaker the Sun's gravitational pull, and the slower it moves in its orbit.Kepler's first law - sometimes referred to as the law of ellipses - explains that planets are orbiting the sun in a path described as an ellipse. The resulting shape will be an ellipse. An ellipse is a special curve in which the sum of the distances from every point on the curve to two other points is a constant.Kepler's second law of planetary motion describes the speed of a planet traveling in an elliptical orbit around the sun. It states that a line between the sun and the planet sweeps equal areas in equal times. Thus, the speed of the planet increases as it nears the sun and decreases as it recedes from the sun.Kepler's Third Law. “The square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit” That's Kepler's third law. In other words, if you square the 'year' of each planet, and divide it by the cube of its distance to the Sun, you get the same number, for all planetsAnswer:
hi i thinks its a
Explanation:
if many household substances classify as acids or bases what is the ph scale
Answer: Some household items that contain acids include: yogurt, vinegar,lemon juice, citric acid, apples, jelly, pineapples, cranberry sauce, milk, and batteries and In chemistry, pH is a scale used to specify how acidic or basic a water-based solution is. Acidic solutions have a lower pH, while basic solutions have a higher pH. At room temperature, pure water is neither acidic nor basic and has a pH of 7.
What factors affect the strength of electronic and magnetic force? Use evidence to support your answer
Answer:
Explanation:
Factors Affecting the Strength of the Magnetic Field of an Electromagnet: Factors that affect the strength of electromagnets are the nature of the core material, strength of the current passing through the core, the number of turns of wire on the core and the shape and size of the core
a farmer moves along the boundary of a square field of side 10 m in 40 s.what will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position ?
Answer:
i think 80 m.
Explanation:
someone pls help with question 4
Answer:
given.. mass of copper 2kg
initial temperature is copper(I)=100°cvolume of water(5l)=5kg of waterinitial water temperature =20°cwhat's the final temperature(f)??from the concept
heat lost from an object=heat gained by the other object
Heat=McΔT
Mč x Cč x ΔTč = Mw x Cw x ΔTw
2kg x 385J/kg°C x (100°c - {F}) = 5kg x 4200J/kg°C x ({f} - 20°C)
77000 - 770F = 21000F - 420,000
21770F =497000
....divide both sides....
F=22.83°C
therefore the final temperature of the water was 22.83°C
If a car has a velocity of 40 km/h west and then comes to a stop in 5 s, what is its acceleration in m/s2?
acceleration = change in velocity /change in time
convert 40km to meter then divide it with 5
Acceleration in m/s² is 2.2 m/s²
Given that;Initial velocity of car = 40 km/h
Time taken to stop = 5 s
Find:Acceleration in m/s²
Computation:Initial velocity of car = 40(1000) / [(60)(60)]
Initial velocity of car = 40,000 / 3600
Initial velocity of car = 11.11 m/s
v = u + at
0 = 11.11 + (a)(5)
5a = -11.11
a = 2.2 m/s²
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A motorcycle travels 15 km west in an hour. The motorcycle then travels 35 km east in another hour. If east is taken as the positive direction, what is the velocity of the motorcycle?
A. -10 km/h
B. 10 km/h
C. 50 km/h
D. -50 km/h
Answer:10km/hr
Explanation:
Displacement=35-10
displacement=20km
Velocity =displacement/time
Velocity =20/2
Velocity =10km/hr
James decides to walk home from school today. He lives 3 miles from school and can walk home in 45 minutes. At what rate is James traveling?
A) 1 mile/10 minutes
B) 1 mile/15 minutes
C) 1 mile/20 minutes
D) 1 mile/30 minutes
Jackie Chan is filming a stunt for his new movie The Last Emperor of Des Moines. In the scene, Jackie is running across the top of a charter bus as it speeds down the highway directly into the path of an oncoming semi-truck. The bus is traveling at 20 m/s due west, Jackie is running 2 m/s due east, and the semi-truck is traveling 15 m/s due east. Describe Jackie's motion from the perspective of the driver of the semi-truck. Be sure to explain your reasoning.
Answer:
33m/s to the west
Explanation:
To describe the motion of Jackie you use the simple sum of velocities in a classical frame of reference. First of all you compute the speed of Jackie measured by an observer at rest. This velocity is the difference between the velocity of the bus and the velocity of Jackie because their motion are opposite.
[tex]v_J'=v_B-v_J[/tex]
v'J: velocity of Jackie as seen by an observer at rest
vJ: velocity of Jackie = 2m/s
vB: Bus velocity = 20m/s
By replacing you obtain:
[tex]v_J'=20m/s-2m/s[/tex] = 18m/s
Now, due to the semi-truck is traveling in the same direction of Jackie, you sum this velocities, in order to calculate the velocity of Jackie as seen by the driver in the semi-truck:
[tex]v_J''=v_J'+v_s=18m/s+15m/s=33m/s[/tex]
hence, the driver of semi-truck sees that Jackie is moving with a velocity of 33m/s to the west
From the semi-truck driver's perspective, Jackie Chan appears to be moving 3 m/s to the west, calculated using the principles of relative motion.
Explanation:The question involves analyzing Jackie Chan's motion from the perspective of the driver of the semi-truck in a scene from a fictitious movie. Here's how you can understand this scenario using basic physics principles:
The bus is moving at 20 m/s to the west.Jackie Chan is running at 2 m/s to the east, relative to the bus.The semi-truck is moving at 15 m/s to the east.From the semi-truck driver's perspective, we calculate relative motion to understand how fast Jackie appears to be moving. Since the semi-truck and Jackie are moving in the same direction (east), you subtract the speed of the bus from the sum of Jackie's speed and the truck's speed. The calculation is as follows:
Effective speed of Jackie from the semi-truck = (Jackie's speed + Truck's speed) - Bus's speed
Effective speed of Jackie = (2 m/s + 15 m/s) - 20 m/s = -3 m/s
This means, from the driver's perspective, Jackie appears to be moving 3 m/s to the west, opposite to the semi-truck's direction. The negative sign indicates the direction opposite to the positive convention, which is east in our initial setup.
What's wrong with the following statement? “The racing car turns around
the corner with a constant velocity of 80 m/s."
in what state of matter can conduction occur
Conduction can occur in all states of matter, including solid, liquid, gas, and plasma. This process involves the transfer of heat through stationary matter by direct physical contact, a result of the thermal motion of atoms and molecules.
Explanation:Conduction, which in the context of physics refers to heat transfer through stationary matter by physical contact, can occur in all three common states of matter - solids, liquids, and gases. This transfer is due to the thermal motion of atoms and molecules at any temperature above absolute zero. For instance, heat is transferred between an electric burner of a stove and the bottom of a pan by conduction. This is because the energetic motion of particles in one area spreads to other regions, and even to adjacent objects in close contact.
In the solid state, conduction is quite efficient because the particles are closely packed and can readily transfer energy to their neighbors. In liquids and gases, the particles are more spread out, but conduction still occurs, albeit at a slower pace. A fourth state of matter, plasma, also exists and conductive heat transfer occurs within this state because it contains appreciable numbers of electrically-charged particles.
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How much voltage is required to run 0.64 A of current through a 240 resistor? Use V= IR.
A. 6.5 x 10^-3 V
B. 1.5 x 10^2 V
C. 3.8 x 10^2 V
D. 2.7 x 10^-3 V
Answer:
B
Explanation:
Math