If I can't open the lid of a jelly jar, I'd keep trying and if I can't open the lid of a jelly jar after the MANY tries I took, I'd ask for help.
Hit in the center of the top, and it will let some air out, that will make it easier.
Which provides the best analogy for an electron in an atomic orbital?
A. a bee moving from flower to flower in a garden
B.a bird resting on a tree branch
C.an ant crawling on the surface of a leaf
D.a bee trying to escape from a closed jar
In an atom the electrons will occupy orbitals so that their energy is as small as possible. That is why the orbitals are ordered based on their energy level in an increasing order, which is associated with a particular range of energy based on its distance from the atom nucleus.
In this sense, an electron "jumps" from one level to another in the atom in the same way a bee tries to escape from a closed jar.
Which of the following experiments or phenomena provided evidence for the particle nature of light?
Interference patterns observed during the double slit experiment.
Expulsion of electrons with varying frequencies of light observed in the photoelectron effect.
Polarization of light
The observed bending of light thought a prism and resulting spectrum.
Expulsion of electrons with varying frequencies of light observed in the photoelectron effect.
Explanation;The photoelectric effect supports a particle theory of light in that it behaves like an elastic collision between two particles, the photon of light and the electron of the metal.Albert Einstein observed the photoelectric effect in which ultraviolet light forces a surface to release electrons when the light hits. He explained the reaction by defining light as a stream of photons, or energy packets.Answer:
Expulsion of electrons with varying frequencies of light observed in the photoelectron effect.
Explanation:
HELP!!
When a coil of wire is moved through a magnetic field, _____.
A. the voltage is first raised and then lowered
B. a solenoid is created
C. mechanical energy is transformed into electrical energy
D. electrical energy is transformed into mechanical energy
Answer:
Faradays Law
Explanation:
Any change in the magnetic environment of a coil of wire will cause a voltage (emf) to be "induced" in the coil. No matter how the change is produced, the voltage will be generated. The change could be produced by changing the magnetic field strength, moving a magnet toward or away from the coil, moving the coil into or out of the magnetic field, rotating the coil relative to the magnet.
how does gravity affect the velocity of falling objects?
please help asap I need this question answered by tommorow
When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity, and velocity, in turn, is a measure of the speed and direction of motion. Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls
Gravity causes objects to accelerate at [tex]9.8 m/s^2[/tex] towards the Earth, meaning their velocity increases uniformly as they fall.
In the absence of other forces, such as air resistance, all objects will experience the same acceleration of [tex]9.8m/s^2[/tex] and thus their velocity will increase at the same rate as they fall.
To understand this, consider Galileo's discovery that, regardless of their mass, objects will fall at the same rate when only gravity is acting upon them. However, air resistance plays a crucial role in real-world scenarios, affecting lighter and more aerodynamically inefficient objects more significantly. For instance, a golf ball falls faster than a flat sheet of paper due to lower air resistance.Mathematically, the velocity of an object in free-fall can be calculated using the formula [tex]v = g t[/tex] , where [tex]v[/tex] is velocity, [tex]g[/tex] is the acceleration due to gravity, and [tex]t[/tex] is the time passed. The position of the falling object can also be determined with [tex]s = 1/2 g t^2[/tex] , where [tex]s[/tex] is the displacement.Experimental evidence supporting this includes the famous 1971 Apollo 15 moon landing experiment where a feather and hammer were dropped simultaneously in the moon's vacuum, showing they fell at the same rate.how is the speed of light affected when it passes through air, water, or glass ?
Answer:
It decreases
Explanation:
The speed of light in a vacuum is
[tex]c=3.0\cdot 10^8 m/s[/tex]
When it travels into a medium, however, light slows down. the speed of light in a medium is given by the equation
[tex]v=\frac{c}{n}[/tex]
where
v is the speed of light in the medium
c is the speed of light in a vacuum
n is the refractive index of the medium
We see that the larger the refractive index of the medium, the lower the speed of light in that medium. For air, water and glass we have:
Air: [tex]n=1.000277[/tex]
Water: [tex]n=1.33[/tex]
Glass: [tex]n=1.52[/tex]
So we can calculate the speed of light in the three mediums:
Air: [tex]v=\frac{3.0\cdot 10^8 m/s}{1.000277}\sim 3.0\cdot 10^8 m/s[/tex]
Water: [tex]v=\frac{3.0\cdot 10^8 m/s}{1.33}\sim 2.26\cdot 10^8 m/s[/tex]
Glass: [tex]v=\frac{3.0\cdot 10^8 m/s}{1.52}\sim 1.97\cdot 10^8 m/s[/tex]
Please help- award 30 points
Brad and Lee are cycling in opposite directions. Brad is cycling at 24mph and Lee is cycling at 33mph
Why does it seem to Brad that Lee is travelling faster than he actually is?
Brad perceives Lee as moving faster because their speeds add up when they're cycling in opposite directions. This combined relative speed is 57 mph, which is much faster than Lee's actual speed of 33 mph.
Explanation:When both Brad and Lee are cycling in opposite directions, the speed at which they appear to be moving away from each other is the sum of their individual speeds. Since Brad is cycling at 24 mph and Lee is cycling at 33 mph, to Brad it would appear that Lee is moving away at a speed of 24 mph + 33 mph = 57 mph, much faster than Lee's actual speed. This is because when two objects are moving in opposite directions, their speeds relative to each other are additive. Therefore, it seems to Brad that Lee is travelling faster than his actual speed of 33 mph.
PLEASE HELP!
What information might you be able to find from the gun and bullets found at the crime scene?
information you might be able to find is the type of gun used and you can collect the fingerprints from the gun and you can possibly locate from where they shot at
Answer:
Explanation:
A crime scene is a location where evidences relating to the crime can be found. The bullets and guns can be useful evidences which can be used to link the criminal with the crime.
Over the gun and bullets fingerprints of the culprit can be found. The gun and bullets may exhibit the class and individual characteristics which can be observed and analyzed.
The class characteristics will include the name of the maker, make and model, design which could be common to many guns and bullets from the same manufacturing company.
The individual characteristics will include the features develop due to wear and use of the gun and the bullet. The barrel of the gun may contain trace amounts of gun shot residues, these will also be present on the surface of the fired bullets.
This is also required to be find out that the bullet can be fired from the gun obtain from the scene of crime or not. The test bullet can be fired from the same gun so as to determine whether the bullet found at the crime scene was fired from the same firearm by comparing the diameter of the barrel with that of the size of the bullets. The striation marks, breech face marks, firing pin marks can be found over the surface of the surface of the bullets generated due to the firing process from gun.
HELP me with this please !!!
The image produced by a plane mirror is because the incident rays coming from the real object (point W in the diagram) reach the mirror and are reflected following the law of Reflection. The prolongation of those reflected rays converge at a point that does not coincide with the actual position of the object. At that point the virtual image of the object is formed.
Then, the reflected divergent rays are captured by our eye converging on the retina (point Z in the diagram).
Now, it is important to note the image produced is virtual because it is a copy of the object that looks as if the object is behind the mirror and not in front of it or on the surface, but it is not really there.
In addition, the image formed is:
symmetrical, because apparently it is at the same distance from the mirror
the same size as the object.
upright, because it retains the same orientation as the object.
So, according to all these, the image will be produced in X
Please Help!!!!!!!!!!!!!!!!!!!!!
How would the tides be different if the Moon revolved around Earth twice a month instead of once a month?
A) High and Low Tide would be more intense
B) There would be no change in the tide
C) There would be 4 spring tides and 4 neap tides a month instead of two
D) There would be 4 spring tides and no neap tide
The correct answer is C.
Explanation:Neap tides are those tidal waves that have the smallest range between high tide and low tide and occur twice in a month.
Spring tides are the tidal waves that have the biggest range between high tide and low tide, and are also seen to occur twice a month.
If the moon revolved twice a month around the Earth, it would mean that the lunar cycle would be of 15 days -meaning 30 days/a month would incorporate two lunar cycles. As the spring and neap tides occur twice each in one lunar cycle, they will occur four times in 30 days.
Hope this helps!When an acrobat reaches the equilibrium position, the net force acting along the direction of motion is zero. Why does the acrobat swing past the equilibrium position
at equilibrium, velocity is at it's maximum. So it keeps going because an object in motion stays in motion.
The statement that is chemical reaction the total mass of the reaction equals the total mass of the products is the law of
Hi, the answer to this would be the conservation of mass.
Some history on this: The law of the conservation of mass was founded by a french chemist named Antoine Lavoisier, and stated that: matter cannot be created or destroyed in a chemical reaction.
Hope this helps and if you have any more questions you can message me and I'll be glad to help. :)
Predict: During a solar eclipse, our view of the sun is blocked by the moon. In the diagramam, draw where you think the moon is located when the observer on Earth is experiencing a solar eclipse
☀️
As it states, the "Sun is blocked by the moon". This means, you'd draw the moon in front of the sun, filling most of sun in the diagram. In 2017, we actually got to experience this! Try and think back to any memories you may have looking through solar glasses.
Object A and B are 10m apart. Which of the following will cause the greatest increase in gravitational force between the objects?
A. Increase the mass of object A.
B. Increase the mass of object B.
C. Increase the distance between objects A and B.
D. Increase the mass of both object A and object B.
D. Increase the mass of both object A and object B
If you increase the mass of object-A (choice-A) OR object-B (choice-B), the gravitational force between them will increase. So naturally, if you increase the mass of both object A and object B, you'll get both increases. (D)
Increasing the distance between the objects (choice-C) will DEcrease the gravitational force between them. This is a big part of the reason why we never feel especially attracted toward Jupiter.
What is the definition for nebula
The definition for nebula is : A cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.
Nebulae "plural" are huge clouds of dust and gasses in outer space. Most of the gas is made up helium and also hydrogen. Nebulae are very big and can be be many light years away.
Which of the following is smaller than a single atom?
Proton
Molecule
Element
Solution
proton boisssssssssssssssssssssssssssssss
if an object looks blue , it reflects_____ light
blue
Because, That object absorbs all colors light waves but does not absorbs Blue. So The blue light is reflected because it is not absorbed.
A centripetal force causes circular motion because it accelerates an object
The answer is option A.
Centripetal force is always directed towards the centre and does not change the speed of the body,but there is a change in the direction.
Answer:
Towards the center of circle, which changes the direction of motion but not speed
Explanation:
The force acting on an object when it is moving in circular path is called centripetal force. The formula for centripetal force is given by :
[tex]F=\dfrac{mv^2}{r}[/tex]
Where
m = mass
v = velocity
r = radius of circle
In a circular path, the velocity of object changes continuously while its speed remains constant. The centripetal force acts towards the center of circle. Hence, the correct option is (a) " towards the center of circle, which changes the direction of motion but not speed ".
Suppose that two pith balls, each with a charge of 1 Coulomb, are hanging in the lab room, seperated by a distance of 1 meter, and applying a force on eachother. What will be the magnitude of the electrostatic force between them?
Using Coulomb's Law, the electrostatic force between two 1 Coulomb charges separated by 1 meter is calculated to be [tex]8.99 \times 10^9[/tex] Newtons. This significant repulsive force illustrates the power of electrostatic forces at even relatively large distances.
Calculating Electrostatic Force Between Two Charges
To determine the electrostatic force between two pith balls, each with a charge of 1 Coulomb, separated by a distance of 1 meter, we use Coulomb's Law. Coulomb's Law is given by the formula:
[tex]F = k \times (|q_1 \times q_2|) / r^2[/tex]
where:
F is the magnitude of the force between the chargesk is Coulomb's constant, approximately [tex]8.99 \times 10^9 N.m^2/C^2[/tex][tex]q_1[/tex] and [tex]q_2[/tex] are the charges (1 C each in this case)r is the distance between the charges (1 meter in this case)Substituting the given values:
[tex]F = 8.99 \times 10^9 N.m^2/C^2 \times (1C \times 1 C) / (1 m)^2[/tex]
This simplifies to:
[tex]F = 8.99 \times 10^9 N[/tex]
a 60 kg gila monster on a merry go round is travelling in a circle with a radius of 3 m at a speed of 2m/s
What is acceleration and net force and compare this with monster weight
Apply the equation for objects that move in circles:
[tex]a = \dfrac{v^2}{r}[/tex],
where
[tex]a[/tex] is the acceleration of the object, [tex]v[/tex] is the tangential speed of the object, and[tex]r[/tex] is the radius of the circular path.For this monster:
[tex]a[/tex] is to be found, [tex]v = 2\;m\cdot s^{-1}[/tex], and[tex]r = 3\;\text{m}[/tex].[tex]\displaystyle a = \frac{({2\;\text{m}\cdot\text{s}^{-1}})^{2}}{3\;\text{m}} = \frac{2^2}{3}\;\text{m}\cdot\text{s}^{-2}= 1.3\;\text{m}\cdot\text{s}^{-2}[/tex].
By Newton's Second Law,
[tex]\Sigma F = m\cdot a[/tex],
where
[tex]\Sigma F[/tex] is the net force on an object,[tex]m[/tex] is the mass of the object, and[tex]a[/tex] is the acceleration of the object.[tex]\Sigma F[/tex] is to be found,[tex]m = 60\;\text{kg}[/tex] for this monster, and[tex]a = 1.33333\;\text{m}\cdot\text{s}^{-2}[/tex] from previous calculations.[tex]\Sigma F = m\cdot a = 60\;\text{kg} \times 1.33333\;\text{m}\cdot\text{s}^{-2} = 80\;\text{N}[/tex].
Weight of an object near the surface of the earth:
[tex]W = m\cdot g[/tex],
where
[tex]m[/tex] is the mass of the object, and[tex]g[/tex] is the gravitational acceleration "constant" (a.k.a. gravitational field strength.) [tex]g \approx 9.81\;\text{N}\cdot\text{kg}^{-1}[/tex] near the surface of the earth.[tex]W = 60\;\text{kg} \times 9.81\;\text{N}\cdot\text{kg}^{-1}=5.9\times 10^{2} \;\text{N}[/tex].
what do sun spots allow us to know about the sun
sun spots allow us to know it hurts and its hot
Sunspots. Sunspots are areas that appear dark on the surface of the Sun. They appear dark because they are cooler than other parts of the Sun's surface. ... These magnetic fields are so strong that they keep some of the heat within the Sun from reaching the surface. you should be carfull of this it can cause the skin to look dirty
A car impacting another car head on will double the force of impact
Answer:
The given statement is True.
Explanation:
A car impacting another car head on will double the force of impact - it is true.
The force of impact will be considered as double when a car is impacting another car head.
This situation is a good example of the law of conservation of momentum according to which the momentum which is present there in a system is always constant unless an external force is applied to it.
A head-on car collision does not double the impact force. Instead the changes in momentum among the two cars are equal and opposite and the total momentum remains constant. Safety features like airbags and seatbelts help to reduce the impact force by increasing the time over which it is applied.
Explanation:The question refers to the physics concept of momentum and force during a collision, particularly a head-on crash between two cars. Momentum change represented by ΔP₁ and ΔP₂ in cars 1 and 2 respectively is determined by the product of the force exerted and duration of the collision in each car. From Newton's third law, this force and change in momentum are proportionate and opposite among the two vehicles, hence ΔP₁ + ΔP₂ = 0. This implies the total momentum of the system – cars 1 and 2, before and after the collision, remains constant.
During a collision, safety mechanisms like airbags and seatbelts influence the net force and momentum. These devices extend the time the force acts on (At) reducing the actual force (Fnet) on the car and its occupants while conserving the total change in momentum (Δp).
Therefore it would be incorrect to say that a car impacting another head-on doubles the force of impact. The changes in momentum are equal opposite and the total momentum remains constant if no external forces are involved.
Learn more about Momentum Conservation here:https://brainly.com/question/33316833
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15. A girl pushes a box that has a mass of 85 kg up an incline. If the giri exerts a force
of 200 N along the incline what is the mechanical advantage of the incline?
M.A = 4.25
Explanation;Mechanical advantage is the ratio of the force required to do something in comparison to the actual force required using a simple machine.
It is the ratio of output force to the input force.
M.A = Output Force/ Input Force
Out put force 85 Kg = 850 N
Input force = 200 N
Therefore;
M.A = 850 N/200 N
= 4.25
If a boy (m = 25 kg) at rest on skates is pushed by another boy who exerts a force of 500 N on him and if the first boy's final velocity is 20 m/s, what was the contact time?
Answer:
1 second
Explanation:
The impulse exerted on the boy is equal to its change of momentum:
[tex]I = \Delta p\\F \Delta t = m \Delta v[/tex]
where
F = 500 N is the push on the boy
[tex]\Delta t[/tex] is the contact time
m = 25 kg is the mass of the boy
[tex]\Delta v = 20 m/s[/tex] is the change in velocity of the boy
Solving the formula for the contact time, we find
[tex]\Delta t=\frac{m\Delta v}{F}=\frac{(25 kg)(20 m/s)}{500 N}=1 s[/tex]
What are the standard units of specific gravity?
g/cm3
kg/L
kg/cm3
none
the answer is b.kg/L
the proper answer is 1.0 kg per litre
Answer:
The answer is: g / cm3.
Explanation:
Specific gravity is a comparison of the density of a substance with the density of water.
The specific gravity of water at a standard temperature and pressure is considered as one, so if the specific gravity of a substance is five, it means that it is five times denser than water.
It is common that said substance is always water, since it is known that it has 1 gram per milliliter or 1 gram per cubic centimeter.
The answer is: g / cm3.
the speed at which an object falls and the acceleration at which it falls are always the same value
True or False
The statement can't possibly be true, simply because speed and acceleration are two different things. They can change separately.
Answer:
False
Explanation:
Air pressure is caused by the density of gas molecules in the air. Please select the best answer from the choices provided T F
Answer: The given statement is true.
Explanation:
Density is defined as mass per unit volume.
Mathematically, Density = [tex]\frac{mass}{volume}[/tex]
So, when more is the density of air molecules then it means there will be more mass per unit volume. This will lead to more number of collisions between the molecules. Hence, more will be the air pressure.
Thus, we can conclude that the statement air pressure is caused by the density of gas molecules in the air, is true.
Answer:
TRUE!
Explanation:
:)
What is the difference between mass and weight? In at least three sentences, explain the difference and give an example.
Mass and weight are different. Mass is the measurement of how much matter an object has, while weight deals with the pull of gravity. For example, an astronaut floating in space is weightless, due to the limited influence of gravity. But he will still have mass, that is because mass and weight are different :)
Mass is entirely a property of the object. So the conditions and environment surrounding the object have no effect on it, and it doesn't change.
Weight is a measurement of the interaction between the object and its environment, so its weight changes as it moves from place to place.
Example:
A standard brass cylinder in a laboratory set of calibrated masses is marked "1 kilogram".
When you weigh it on Earth, the scale says "9.8 Newtons" or "2.2 pounds".
If you take the set of calibrated masses to the Moon with you, and weigh the same "1 kilogram" piece, it weighs "1.62 Newtons" or "5.8 ounces" up there.
Sort the characteristics of solids liquids and gases into the correct colums
Solids have molecules that move slowly and are close together and are very attracted to eachother.
Liquids have molecules that move freely and are slightly attracted to eachother.
Gases have molecules that move, but aren't attracted to eachother.
The characteristics of solids, liquids, and gases differ by density, shape, volume, and how sensitive they are to changes in temperature and pressure. Solids are dense with a definite shape, liquids have a definite volume but take the shape of their container, and gases have the lowest density and fill their containers completely.
Understanding the characteristics of the three common phases of matter—solids, liquids, and gases—is fundamental in chemistry. Here's how these states typically compare:
Density: Solids usually have the highest density, followed by liquids, and gases have the lowest density.
Shape: Solids have a definite shape, liquids take the shape of their container, and gases fill the entire volume of their container.
Volume: For a given mass, solids and liquids have a definite volume, while the volume of gases can change markedly with temperature and pressure.
Sensitivity to Temperature: Gases are most sensitive to changes in temperature, followed by liquids, with solids being the least sensitive.
Sensitivity to Pressure: Gases are also highly sensitive to changes in pressure, while the volumes of liquids and solids are relatively incompressible, meaning they are less affected by pressure changes.
The arrangement of atoms or molecules within these phases: In solids, atoms are tightly packed in a fixed arrangement; in liquids, they are close but can slide over each other; and in gases, they are far apart and move freely.
Propane (C3H8combines with oxygen gas (O2to form carbon dioxide (CO2and water (H2O). Describe the number and type of atoms for a molecule of each substance.
The balanced equation for the combustion of propane is C₃H₈(g) + 5O₂(g) → 3CO₂(g) + 4H₂O(l), indicating that one molecule of propane reacts with five molecules of oxygen to produce three molecules of carbon dioxide and four molecules of water, keeping the atom count consistent on both sides of the reaction.
Combustion of Propane
To balance the chemical equation for the combustion of propane (C₃H₈), we must account for the number and type of atoms in both the reactants and the products to comply with the law of conservation of mass. The balanced equation is C₃H₈(g) + 5O₂(g)
ightarrow 3CO₂(g) + 4H₂O(l). Each molecule of propane contains 3 carbon atoms and 8 hydrogen atoms. When propane combusts in the presence of oxygen gas, it forms carbon dioxide and water. For carbon dioxide, each molecule contains 1 carbon atom and 2 oxygen atoms, and for water, 2 hydrogen atoms are bonded to 1 oxygen atom.
In the balanced reaction, we can break down the numbers further:
1 molecule of propane (C₃H₈) reacts with 5 molecules of oxygen (O₂).
3 molecules of carbon dioxide (CO₂) are produced.
4 molecules of water (H₂O) are formed.
This ensures that we have the same number of each type of atom on both the reactant and product sides of the equation.
As a transverse wave travels through a rope from left to right, the parts of the rope _______.
In a transverse wave traveling through a rope, parts of the rope move perpendicular to the wave's direction, with oscillations being vertical or horizontal, corresponding to vertical or horizontal polarization.
Explanation:As a transverse wave travels through a rope from left to right, the parts of the rope move up and down or side to side, perpendicular to the direction of the wave travel. The motion of part of the rope depends on the orientation of the oscillations. If the oscillations of the transverse wave are in a vertical plane, they are described as vertically polarized, and correspondingly, if in a horizontal plane, they are horizontally polarized.
Considering the case of a vertically polarized wave, if a vertical slit is positioned in relation to the rope, it allows the passage of the wave.
However, the same vertical slit would block transverse waves that are horizontally polarized. This concept of polarization is important not only when studying waves in ropes but also for electromagnetic (EM) waves, where the direction of the electric field represents similar behavior to the disturbances seen in rope waves.
Therefore, when we think about the parts of a rope where a transverse wave is traveling from left to right, we focus on the unique movement of those parts of the rope in relation to the direction of energy transfer—illustrating the key behavior of transverse waves.