Answer:
oxygen
Explanation:
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
(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 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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Help me please! 25 points
Answer:
1.A compound is a substance formed when two or more elements are chemically joined.
2.3 things that can be consider compounds are water,sugar and methane
Explanation:
Answer:
1.A compound is a substance formed when two or more elements are chemically joined.
2.3 things that can be consider compounds are water,sugar and methane
Explanation:
to easy
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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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:
What's wrong with the following statement? “The racing car turns around
the corner with a constant velocity of 80 m/s."
What is created when charged particles are moving in a single direction and path?
I think it is Drift Velocity.
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
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.
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.
A reflectance curve is produced when ___________ analysis is used to describe the light wavelengths reflected by objects.
Answer:
Spectral
Explanation:
I just answered this question on USA test prep
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
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
A circuit with a current of 400 amp has several lights that have a total resistance equal to 30 ohms. Find the voltage.
Answer:
V= 12000 V
Explanation:
Using Ohm's Law
V= I x R
V= 400 x 30
V= 12000 v
The voltage in a circuit can be found using Ohm's law (V = I * R). In the given circuit with a current of 400 Amps and a resistance of 30 Ohms, the voltage would be 12,000 volts.
Explanation:The subject of this question is related to electricity in Physics, specifically dealing with calculating voltage in a circuit. The relation between voltage, current, and resistance in a circuit can be given by Ohm's law, which states that voltage equals current times resistance (V = I * R). In this case, to find the voltage, you would multiply the given current (400 amps) and resistance (30 ohms). Thus, the voltage in this circuit would be 400 Amp * 30 ohms = 12,000 volts.
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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
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
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
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.
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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Kinetic Energy - What does it depend on?
The greater the ______________ of a moving object, the _____________________ it has.
Help!
Answer:
faster; more kinetic energy
Explanation:
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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1. Oxygenated blood is necessary for proper bodily functions. If there isn’t enough oxygen in a person’s blood they can become light headed, disoriented, and feel extremely tired. How does the oxygen enters the blood?
Answer:
Explanation:
The oxygen enters the bloodstream from the alveoli, tiny sacs in the lungs where gas exchange takes place.
The transfer of oxygen into the blood is through simple diffusion.The oxygen molecules move, by diffusion, out of the capillaries and into the body cells.
Answer:
The oxygen enters the bloodstream from the alveoli, tiny sacs in the lungs where gas exchange takes place. The transfer of oxygen into the blood is through simple diffusion. ... The oxygen molecules move, by diffusion, out of the capillaries and into the body cells.
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
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:
Starting from rest, how long does it take a moving man to reach a velocity of 5 m/s if his acceleration is +1.75 m/s2?
Answer:
time=20/7 seconds
Explanation:
Initial velocity(u)=0
Final velocity(v)=5m/s
Acceleration(a)=1.75m/s2
Time(t)=?
V=u+at
5=0+1.75xt
5=1.75t
t=5/1.75
t=20/7 seconds
GIVING BRAINLIEST Which statement best explains how Earth's magnetic field is generated? Earth's core spins slower than its crust Heat exchange between the mantle and crust The convection of heat within the mantle Rotation of liquid iron in the outer core
Answer C is INCORRECT. The correct answer is "Rotation of liquid iron in the outer core." For example the text from my course states that "As Earth spins on its axis, rotation of the liquid outer core generates Earth's magnetic field."
The statement best explains how Earth's magnetic field is generated by the Rotation of liquid iron in the outer core
What is magnetic field of earth?Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from Earth's interior out into space, where it interacts with the solar wind, a stream of charged particles emanating from the Sun.
The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in Earth's outer core
The inner core (which is solid) is the hottest layer of the earth. It, therefore, contributes to heating up the outer core. The outer core is liquid and rotation of the earth (Coriolis effect) causes the molten rocks to swirl like a tornado.
Because the outer core is mostly made of metals, that have lost electrons and hence charged (due to the enormous heat), the swilring effect causing an electric effect.
This consequently causes the dynamo effect that creates a magnetic field. This magnetic field covers the earth and protects it from harmful radiation from the solar storms.
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Human activies that impact water cycle include
a. Use of toxic chemicals in agriculture and manufacturing run-off
b. A decreased use of water by animals
c. An increase of sedimentation of rivers
d. A decrease in the erosion of creek beds
Answer:
a. Use of toxic chemicals in agriculture and manufacturing run-off
Explanation:
it is the only activity listed the rest are possible impacts
Answer:
A
Explanation:
An ice cube (n = 1.31) has a layer of water (n = 1.33) on it. What is the critical angle for a ray in water trying to enter the ice?
(Unit=deg)
Answer:
Explanation:
Given that,
The Refractive index of glass is
n(ice) = 1.31
The refractive index of water is
n(water) = 1.33
What is the critical angle?
From water to ice
Critical angle is given as.
Using Snell's Rule.
Sin( θc ) = n1 / n2
for total internal reflection the incident ray is always in the denser medium! So, water is the more denser than ice.
Then, .
Sin( θc ) = n(ice) / n(water)
Sin( θc ) = 1.31 / 1.33
Sin( θc ) = 0.98496
θc = arcSin(0.98496)
θc = 80.05°
The critical angle is 80.05°
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.