Using the mirror formula.
1/v + 1/u = 1/f
1/9.5 + 1/3.2 = 1/f
1/f = 3.2 + 9.5 / 9.5 * 3.2
1/f = 4.82 cm
Radius = 2f
Radius = 2 x 4.82
Radius = 9.64 cm
Answer:
Radius of curvature, R = 9.64 cm
Explanation:
It is given that,
Object distance, u = -9.5 cm
Image distance, v = 3.2 cm
We have to find the radius of curvature of the mirror. The relationship between focal length and the radius of curvature as R = 2 f where f is the focal length of the mirror.
Using Mirror's formulas as :
[tex]\dfrac{1}{v}+\dfrac{1}{u}=\dfrac{1}{f}[/tex]
[tex]\dfrac{1}{3.2}+\dfrac{1}{-9.5}=\dfrac{1}{f}[/tex]
f = 4.82 cm
And radius of curvature of the mirror becomes, R = 9.64 cm. Hence, this is the required solution.
Which example best illustrates the transfer of energy between two waves? A) A buoy rises in the water as a boat speeds past. B) A basketball rebounds from the backboard during a missed shot. C) An egg that rolls off the counter falls and breaks on the floor. D) A car that rear ends another car causes damage to both vehicles.
Answer:
A.
Explanation:
Answer: Option A
Explanation: Waves (mechanical and electromagnetic) can transfer energy when they impact into something.
When a boat speeds in the water, the boat itself pushes water around it generating mechanical waves in the water, those mechanical waves now travel on the surface of the water. When those mechanical waves impact the buoy, the waves also move the buoy, and now the buy is in a "wave-like" motion (you can model the movement of the buoy as a mechanical wave, that goes up and down), so this is a good example of energy transfer.
You have two steel solid spheres. sphere 2 has twice the radius of sphere 1. part a by what factor does the moment of inertia i2 of sphere 2 exceed the moment of inertia i1 of sphere 1?
The moment of inertia [tex]\( I_2 \)[/tex] of sphere 2 exceeds the moment of inertia [tex]\( I_1 \)[/tex] of sphere 1 by a factor of 4.
The moment of inertia I of a solid sphere is given by the formula:
[tex]\[ I = \frac{2}{5} m r^2 \][/tex]
Where:
- m = mass of the sphere
- r = radius of the sphere
Given that sphere 2 has twice the radius of sphere 1, we can express the radius of sphere 2 as 2r, where r is the radius of sphere 1.
Now, let's consider the moment of inertia for each sphere:
1. Sphere 1 (with radius r):
[tex]\[ I_1 = \frac{2}{5} m r^2 \][/tex]
2. Sphere 2 (with radius (2r):
[tex]\[ I_2 = \frac{2}{5} m (2r)^2 \][/tex]
We can simplify [tex]\( I_2 \)[/tex] as follows:
[tex]\[ I_2 = \frac{2}{5} m (4r^2) = \frac{8}{5} m r^2 \][/tex]
Now, to find the factor by which [tex]\( I_2 \)[/tex] exceeds [tex]\( I_1 \)[/tex], we divide [tex]\( I_2 \)[/tex] by [tex]\( I_1 \)[/tex]:
[tex]\[ \text{Factor} = \frac{I_2}{I_1} = \frac{\frac{8}{5} m r^2}{\frac{2}{5} m r^2} \][/tex]
[tex]\[ \text{Factor} = \frac{\frac{8}{5}}{\frac{2}{5}} = \frac{8}{2} = 4 \][/tex]
So, the moment of inertia [tex]\( I_2 \)[/tex] of sphere 2 exceeds the moment of inertia [tex]\( I_1 \)[/tex] of sphere 1 by a factor of 4.
Complete Correct Question:
You have steel solid spheres. Sphere 2 has twice the radius of sphere 1. by what factor does the moment of inertia of sphere 2 exceed the moment of inertia of sphere 1?
A. 2
B. 4
C. 32
D. 8
E. 16
F. 64
Gel electrophoresis is a technique used to separate nucleic acids by their _______.
Gel electrophoresis is called to the technique used by scientists for analytical purposes, in life sciences laboratories to separate macromolecules (DNA, RNA, and proteins from various sources).
The process consists of separating the molecules according to their size and electric charge. This is done with a gel (a gelatinous substance extracted from seaweed, called agarose) of controllable porosity placed in an ionic buffer environment. This is how the gel acts as a molecular sieve that separates larger molecules from the smaller ones, because each molecule has different size and charge and will move through the gel at different speeds.
That is, the smaller molecules move more quickly through the gel while the larger ones are left behind.
Gel electrophoresis is a technique used in biology to separate nucleic acids such as DNA based on size. The negatively charged nucleic acids move through a semisolid gel when an electric field is applied, with smaller molecules moving faster than larger ones. The fragments can be observed as bands on the gel, their distance from the top depending on their size.
Explanation:Gel electrophoresis is a technique used to separate nucleic acids, such as DNA fragments, based on their size. This separation occurs because nucleic acids, which carry a negative charge, move through a semi-solid, porous gel when subjected to an electric field. They load near the gel's negative electrode and move towards the positive one at the opposite end. The speed at which these molecules move depends on their size, with smaller ones moving faster through the gel's pores than larger ones. This difference in migration rate enables the separation. When observed with fluorescent or colored dyes, distinct fragments of nucleic acids appear as bands at specific distances from the top of the gel, based on their size.
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You push a box across the floor with a force of 30 N. You push it 15 meters in 8 seconds. How much work did you do? How much power did you use?
PLZZZZZZ ANSWER BOTH PARTS
Work = (force) x (distance)
Work = (30 N) x (15 m)
Work = 450 Joules
Power = (work done) / (time to do the work)
Power = (450 Joules) / 8 seconds)
Power = 56.25 watts
determining the dates of old objects using radioactive elements is called what_______ dating?
help fast!!!!!!
determining the dates of old objects using radioactive elements is called what radiometric dating
Answer: radiometric
Answer: Radiometric
Explanation: Apex
The color of an opaque object is the same as the light that is
a) transmitted b) absorbed c) reflected d) all of these
Answer: reflected
A material is opaque when it does not allow light to pass through itself.
In other words:
When light illuminates an opaque object, no ray passes through it, as most of the light is reflected or absorbed by the object.
In this context, the main characteristic of this type of objects is that the color of the material depends on the light it absorbs. It means that depending on its chemical composition they can absorb certain wavelengths (colors) and reflect others.
Therefore, the color we see in an object is the light it reflects. For example, if we see a red table, this means that when light iluminates it, this table absorbed all the visible wavelengths, except the red, which is the light that is reflected and perceived by our eyes.
Which of the following statements are true about bar magnets?
a. The direction of the magnetic field are considered to flow from the south pole to the north pole around the outside of the magnet.
b. If a bar magnet is cut in half, two new magnets will be formed each with a south and north pole
c. The north pole of a bar magnet will align itself with the South Pole of the earth.
d. All magnets have a similar magnetic field as a bar magnet.
Answer:
b. If a bar magnet is cut in half, two new magnets will be formed each with a south and north pole
Explanation:
As we know that magnetic field lines always originates from north pole of magnet and then terminate at south pole.
Also all magnets must have two poles (i) North pole (ii) South Pole
now if we break a magnet into two parts then this magnet will again form two new poles on the opposite sides so that each half will again have two different poles of magnet
So here we can say that when a bar magnet is cut into two parts then each part will behave like a new magnet.
so correct answer will be
b. If a bar magnet is cut in half, two new magnets will be formed each with a south and north pole
Final answer:
Bar magnets have a magnetic field direction from the north pole to the south pole externally, and cutting a bar magnet in half results in two new magnets each with a north and a south pole. The north pole of a magnet aligns with the Earth's magnetic South Pole.
Explanation:
The truth about bar magnets can be understood by examining their properties and behaviors:
Statement a is incorrect. The direction of the magnetic field lines around a magnet is from the north pole to the south pole externally, and it's the opposite inside the magnet.Statement b is correct. When you cut a bar magnet in half, you end up with two new magnets, each with a north and a south pole.Statement c is correct as the north pole of a bar magnet will align with the Earth's magnetic South Pole, which is geographically near the Earth's North Pole.Statement d is overly general. While it is true that all magnets have a north and south pole and the field lines form closed loops, their magnetic field shapes can vary based on the physical shape of the magnet.Will these balloons be repelled or attracted? Why? Enter your answer in the space provided.
Answer:
They will be attracted.
Explanation:
They will be attracted because the negatives block the positive in the right balloon and positive attracts negative. Also, the positive attracts the negative in the left balloon. Therefore, they will be attracted. Hope this helps.
Answer:
they will atract eachother
Explanation:
Which form of radioactive decay would you be most likely to detect if it was happening in the room next to the one you are currently in?
Answer:
gamma, becasue the alpha particals would be blocked by the wall between you. radiation gives off gamma particals and Alpha particals mostly.
Explanation:
Gamma decay would be most likely deflected.
What is meant by radioactive decay ?When an unstable atomic nucleus loses energy by radiation, the process is referred to as radioactive decay.
A substance is defined as radioactive if it has unstable nuclei. The three most common kinds of decay are alpha decay, beta decay, and gamma decay, all of which involve the emission of one or more particles.
The definition of alpha decay refers to a typical kind of radioactive decay when a nucleus generates an alpha particle.
A nucleus releases beta particles as it undergoes beta decay, a typical kind of radioactive decay.
A nucleus undergoes gamma decay when it transforms from a state with a greater energy to one with a lower energy by emitting electromagnetic radiation (photons).
Hence,
Gamma decay would be most likely deflected.
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8. A vacuum tube can be used to
A. change alternating current into direct current
B. increase the strength of a signal
C. turn a current on or off
D. all of the above
9. A solid-state component with three layers of semiconductors is a
A. transistor
B. diode
C. vacuum tube
D. resistor
10. What is the primary use of transistors in a mobile phone?
A. store electric charge
B. maintain proper voltage
C. store data
D. amplify the phone's incoming signal
answers to electronic devices quiz
DCCABDADAD
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Compare the water pressure directly below the hull of the yacht (point
a.to the pressure at the same depth, but to the side of the ship (point b).
Answer:water is more dense
Explanation:
Answer:
[tex]P_a = P_b[/tex]
Explanation:
As per Pascal's law we know that when liquid is at rest then the pressure due to liquid at all points lying at the same level will be same
So here as per given figure we know that two points are lying at the same level under the water level
As per pascal's law the pressure at point points will be same
So correct answer will be
[tex]P_a = P_b[/tex]
What are the variables in Gay-Lussac's law? pressure and volume pressure, temperature, and volume pressure and temperature volume, temperature, and moles of gas
Answer:
pressure and temperature (assuming volume is constant)
Explanation:
Answer:
the answer is C on edge.
Explanation:
Which was the first object made by humans to orbit earth?
The first human made object made to orbit earth was the Soviet Union's Sputnik 1, it launched the 4th of October 1957.
Final answer:
The first human-made object to orbit Earth was the Soviet satellite Sputnik 1, launched on October 4, 1957. It marked the beginning of the Space Age and initiated the study of orbitography.
Explanation:
The first object made by humans to orbit Earth was Sputnik 1, launched by the Soviet Union on October 4, 1957. This pioneering artificial satellite emitted a beeping radio signal, symbolizing the commencement of the Space Age and marking a historically significant moment in human exploration of space. It didn't carry cameras, but it transmitted a signal that brought awareness to the world about human capabilities in space.
Sputnik's launch set the scene for the future of orbital space, initiating a new field of knowledge referred to as orbitography, which studies the movements and characteristics of objects in Earth's orbital space. Following Sputnik, thousands of satellites and space debris have since populated Earth's orbit, with scientific and technological advancements continuing to push the boundaries of space exploration.
How many days does it take for the moon to make a quarter orbit
Answer: 27.3 days.
Explanation: The Moon actually takes 27.3 days to complete one orbit around Earth. The Moon takes 29.5 days to complete one cycle of phases.
when water vapor condenses on the inside of a window, the window becomes
Answer:The window becomes wet.
Explanation: When the water vapor condenses, the vapor is changing into its liquid form. In this case, the vapor condenses into liquid water.
Humid/ wet. You will see drops on the inside of the window. Condensation is the change from a gas to a liquid.
A 200-loop coil of cross sectional area 8.5 cm2 lies in the plane of the page. An external magnetic field of 0.060 T is directed out of the plane of the page. The external field decreases to 0.020 T in 12 milliseconds. (a) What is the magnitude of the change in the external magnetic flux enclosed by the coil? (b) What is the magnitude of the average voltage induced in the coil as the external flux is changing? (c) If the coil has a resistance of 4.0 ohms, what is the magnitude of the average current in the coil?
(a) 0.0068 Wb
Since the plane of the coil is perpendicular to the magnetic field, the magnetic flux through the coil is given by
[tex]\Phi = NBA[/tex]
where
N = 200 is the number of loops in the coil
B is the magnetic field intensity
[tex]A=8.5 cm^2 = 8.5\cdot 10^{-4} m^2[/tex] is the area of the coil
At the beginning, we have
[tex]B_i = 0.060 T[/tex]
so the initial magnetic flux is
[tex]B_i = (200)(0.060 T)(8.5\cdot 10^{-4} m^2)=0.0102 Wb[/tex]
at the end, we have
[tex]B_f=0.020 T[/tex]
so the final magnetic flux is
[tex]B_f = (200)(0.020 T)(8.5\cdot 10^{-4} m^2)=0.0034 Wb[/tex]
So the magnitude of the change in the external magnetic flux through the coil is
[tex]\Delta \Phi = |\Phi_f - \Phi_i|=|0.0034 Wb-0.0102 Wb|=0.0068 Wb[/tex]
(b) 0.567 V
The magnitude of the average voltage (emf) induced in the coil is given by Faraday-Newmann law
[tex]\epsilon= \frac{\Delta \Phi}{\Delta t}[/tex]
where
[tex]\Delta \Phi = 0.0068 Wb[/tex] is the variation of magnetic flux
[tex]\Delta t = 12 ms = 0.012 s[/tex] is the time interval
Substituting into the formula, we find
[tex]\epsilon=\frac{0.0068 Wb}{0.012 s}=0.567 V[/tex]
(c) 0.142 A
The average current in the coil can be found by using Ohm's law:
[tex]I=\frac{V}{R}[/tex]
where
I is the current
V is the voltage
R is the resistance
Here we have:
V = 0.567 V (induced voltage)
[tex]R=4.0 \Omega[/tex] (resistance of the coil)
Solving for I, we find
[tex]I=\frac{0.567 V}{4.0 \Omega}=0.142 A[/tex]
We calculate the change in magnetic flux with ΔΦ = n*A*(Bf - Bi). The average induced voltage (or emf) can be computed using Faraday’s Law (ΔV = - ΔΦ / Δt). The average current is calculated using Ohm's Law (I = ΔV / R).
Explanation:This question involves the concepts of electromagnetic induction and Ohm's Law. To solve the problem, we'll use Faraday's Law of electromagnetic induction and Ohm's law.
(a) The magnitude of change in external magnetic flux enclosed by the coil is calculated using the formula: ΔΦ = n*A*(Bf - Bi) where ΔΦ is the change in flux, n is the number of loops, A is the cross-sectional area, Bf is the final magnetic field strength, and Bi is the initial magnetic field strength. Using the given values, ΔΦ = 200 * (8.5E-4 m²) * (0.020 T - 0.060 T) = -0.0068 Weber.
(b)The average voltage (or emf) induced in the coil as the external flux is changing is given by Faraday’s law: ΔV = - ΔΦ / Δt, where Δt is the change in time. Thus, ΔV = - (-0.0068 Wb) / 12E-3 s = 0.57 V.
(c)Finally, the average current in the coil can be found using Ohm's Law: I = ΔV / R, where R is the resistance. Hence, I = 0.57 V / 4.0 Ω = 0.1425 A.
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Find the de broglie wavelength of an electron in the ground state of the hydrogen atom.
de Broglie wavelength (λ) is given by the equation
λ = h/p
where h=Planck’s constant whose value is 6.62 x 10^(−34) joule-seconds and
p = momentum of the particle(here electron)
In terms of kinetic energy(E) momentum(p) can be written as,
p=(2mE)^1/2
where m=mass of the particle.
Hence λ becomes
1 λ = h(2mE)^-1/2
Given here, E = 13.6 eV = 13.6×1.6×10^-19 joule
m(mass of electron)= 9.1×10^-31 kg
Putting these values in equation (1) we get ,
λ =0.332×10^(-9) meter
=3.32×10^(-10) meter
=3.32 Å
De Broglie wavelength of an electron in the ground state of the hydrogen atom is about 3.33 × 10⁻¹⁰ m
[tex]\texttt{ }[/tex]
Further explanationThe term of package of electromagnetic wave radiation energy was first introduced by Max Planck. He termed it with photons with the magnitude is :
[tex]\large {\boxed {E = h \times f}}[/tex]
where:
E = Energi of A Photon ( Joule )
h = Planck's Constant ( 6.63 × 10⁻³⁴ Js )
f = Frequency of Eletromagnetic Wave ( Hz )
[tex]\texttt{ }[/tex]
Let's recall De Broglie's Wavelength Formula as follows:
[tex]\boxed{\lambda = \frac{h}{mv}}[/tex]
where:
λ = wavelength ( m )
h = Planck's Constant ( 6.63 × 10⁻³⁴ Js )
m = mass of object ( kg )
v = velocity of object ( m/s )
Let us now tackle the problem !
[tex]\texttt{ }[/tex]
Given:
energy of the ground state of the hydrogem atom = E = 13.6 eV = 2.176 × 10⁻¹⁸ J
Asked:
wavelength of electron = λ = ?
Solution:
Firstly , we will calculate the speed of the electron :
[tex]E = E_k[/tex]
[tex]E = \frac{1}{2}mv^2[/tex]
[tex]v^2 = 2E \div m[/tex]
[tex]\boxed{v = \sqrt{ 2E \div m } }[/tex] → Equation A
[tex]\texttt{ }[/tex]
Next, we will use the formula of The Broglie's Wavelength:
[tex]\lambda = \frac{h}{mv}[/tex]
[tex]\lambda = \frac{h}{m\sqrt{ 2E \div m }}[/tex] ← Equation A
[tex]\lambda = \frac{6.63 \times 10^{-34}}{9.11 \times 10^{-31} \sqrt{ 2 \times 2.176 \times 10^{-18} \div 9.11 \times 10^{-31} }}[/tex]
[tex]\boxed{\lambda = 3.33 \times 10^{-10} \texttt{ m}}[/tex]
[tex]\texttt{ }[/tex]
Learn morePhotoelectric Effect : https://brainly.com/question/1408276Statements about the Photoelectric Effect : https://brainly.com/question/9260704Rutherford model and Photoelecric Effect : https://brainly.com/question/1458544[tex]\texttt{ }[/tex]
Answer detailsGrade: College
Subject: Physics
Chapter: Quantum Physics
A radioisotope has a half-life of 5.50 min and an initial decay rate of 7200 Bq. What will be the decay rate after 22 min? Show all work and include units of measure.
Explanation:
This problem can be solved using the Radioactive Half Life Formula:
[tex]A=A_{o}.2^{\frac{-t}{h}}[/tex] (1)
Where:
[tex]A[/tex] is the final amount of radioisotope (decay rate)
[tex]A_{o}=7200Bq[/tex] is the initial amount of the radioisotope
[tex]t=22min[/tex] is the time elapsed
[tex]h=5.50min[/tex] is the half life of the radioisotope
Knowing this, let's find [tex]A[/tex] from (1):
[tex]A=(7200Bq).2^{\frac{-22min}{5.50min}}[/tex] (2)
[tex]A=(7200Bq).2^{(-4)}[/tex]
[tex]A=(7200Bq)(0.0625)[/tex] (3)
Finally:
[tex]A=450 Bq[/tex]>>> This is the decay rate of the radioisotope
Note it is in Becquerels (Bq), which is the derived unit approved by the International System of Units for radioactivity
distinguish the differences between diamagnetic and paramagnetic materials. Give examples of each type of material
Answer:
Paramagnetic materials are attracted by external magnetic fields whereas diamagnetic materials are repelled. Paramagnetic materials have at least one unpaired electron in the system, but diamagnetic materials have all their electrons paired.
Explanation:
Diamagnetic materials are weakly repelled by magnetic fields due to induced dipoles aligning oppositely, while paramagnetic materials are weakly attracted due to their unpaired electrons aligning with the field. Copper and gold are examples of diamagnetic materials, whereas aluminum and magnesium are examples of paramagnetic materials.
Diamagnetic and paramagnetic materials respond differently to magnetic fields due to their distinct atomic properties.
Diamagnetism is characterized by a weak repulsion from magnetic fields. This occurs because the atoms in diamagnetic materials have no permanent magnetic dipole moments. When an external magnetic field is applied, it induces magnetic dipoles within the atoms. These induced dipoles align oppositely to the applied field, creating a repulsive effect. When the field is removed, the induced magnetic effect vanishes.
Examples of diamagnetic materials include copper, gold, and silicon.
Paramagnetism involves a weak attraction to magnetic fields. The atoms in paramagnetic materials have unpaired electrons, which results in permanent magnetic dipole moments. When an external magnetic field is applied, these dipoles tend to align with the field, enhancing its effect. However, this alignment is temporary and disappears when the external field is removed.
Examples of paramagnetic materials include aluminum, magnesium, and platinum.
Which resistors in the circuit must have the same amount of charge passing through each second?
Answer:
Option B) C and D
Explanation:
The amount of charge passing through a resistor each second corresponds to the definition of current, so the problem is asking "which resistors have the same amount of current".
Let's keep in mind that:
- When two resistors are in series (=they are connected into the same branch of the circuit), the current flowing through each resistor is the same
- When two resistors are in parallel (=they are connected into different branches), the potential difference across each resistor is the same
Looking at the previous definitions, we have to find the two resistors in the circuit that are connected in series. We see that resistors C and D are in the same branch, so they are in series: therefore, the current flowing through resistor C and D is the same.
The action of property being taken directly from a person or in that person's presence must be an element in which type of crime?
A) theft
B) Larceny
B, larceny because that's theft of personal property.
How do you explain the fact that sometimes less work is done in a situation in which more force is used than in a situatio in which less force is used
rank planets left to right based on distance from the sun
from farthest to the nearest
Neptune
Uranus
saturn
Jupiter
mars
earth
venus
mercury
Answer:
I mean since this is just telling where the normal line of the planets is and not a Jovian etc.
MercuryVenusEarthMarsJupiterSaturnUranusNeptuneExplanation:
It's just asking the order from smallest to greatest. Just flip it the other direction if it's largest to smallest.
Describe how electric potential energy, kinetic energy, and work change when two charges of opposite sign are placed near each other.
potential energy is energy that is stored and kinetic energy is energy in motion and I believe that if you try to put them together it might not work potential energy would be a minus in the side for kinetic energy would be a plus sign
As opposites attract, Potential energy is pulled to Kinetic energy. The force from Kinetic energy is working on potential energy over a distance. This means the potential energy (q )started with is being converted into kinetic energy (Q). Potential energy is accelerating and picking up speed.
What are potential energy and kinetic energy?Potential energy is what we call stored energy. Kinetic energy is a form of energy that an object or a particle has by reason of its motion.When the electric field does positive work on a charge (as in the example above), the potential energy of the field decreases as the tank is depleted of energy. Conversely, the potential energy increases when the electric field steals energy by doing negative work (by slowing down a charge, for instance).To learn more about potential and kinetic energies, refer to: https://brainly.com/question/18556454
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The molecular weight of carbon dioxide (CO2) is 44.00 a.m.u., and the molecular weight of propane gas (C3H8) is 44.10 a.m.u. Thus CO2 diffuses_______ C3H8.
Slower Than
Faster Than
The Same As
The molecular weight of carbon dioxide (CO2) is 44.00 a.m.u., and the molecular weight of propane gas (C3H8) is 44.10 a.m.u. Thus CO2 diffuses_______ C3H8.
Slower Than
Faster Than
The Same As
Slower than
Answer: [tex]CO_2[/tex] gas diffuses faster than [tex]C_3H_8[/tex]
Explanation:
Diffusion of a gas is defined as the amount of volume of gas displaced in a given amount of time. The diffusion of gas is determined by using Graham's Law.
This law states that the rate of diffusion of gas is inversely proportional to the square root of its molar mass. The equation given by this law follows:
[tex]\text{Rate of diffusion}\propto \frac{1}{\sqrt{\text{Molar mass of the gas}}}[/tex]
More the molar mass of the gas, its rate of effusion will be less and vice-versa.
We are given:
Molar mass of carbon dioxide = 44 g/mol
Molar mass of propane = 44.10 g/mol
As, the molar mass of carbon dioxide is less than the molar mass of propane by 0.1 unit, so rate of diffusion of carbon dioxide is faster than the rate of effusion of propane.
Hence, [tex]CO_2[/tex] gas diffuses faster than [tex]C_3H_8[/tex]
A neutral atom of tin (Z = 50) has 69 neutrons. (a) How many protons does it have? (b) What is its mass number?
Answer:
Protons = 50
Mass number = 119
Explanation:
A neutral of tin, Sn, has a Z value of 50 and neutrons are 69.
Z is the atomic number. The atomic number is equal to number of protons or number of electrons in an atom that is neutral i.e:
Z = PROTONS = ELECTRONS
So the number of protons = 50 since Z is 50
>>>>>>>>>>>>>>>¦
The bulk of the mass of an atom is concentrated in the nucleus. To calculate mass number, we simply sum all the elementary particles in the nucleus i.e protons and neutrons. These particles are called the nucleons.
Mass number (A) = P + N
= 50 + 69
= 119
Answer: 119
Explanation:
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! I CANNOT RETAKE THIS AND I NEED ALL CORRECT ANSWERS ONLY!!!
In a magnet, what type of poles are attracted to each other?
B.
because N -pole and S-pole attrack
Answer:
Opposite poles attract each other, similar poles repel.
Explanation:
(Unlike or different poles)
An electric light is plugged into a 120-V outlet. If the current in the bulb is 0.50 A, how much electrical energy does the bulb use in 15 minutes?
Answer:
= 54,000 Joules or 54 kJ
Explanation:
Electrical energy is given by the formula;
E = VIt; where V is the potential difference in volts, I is the current and t is the time in seconds.
Therefore;
Electrical energy = 120 V × 0.50 A × 15 ×60 seconds
= 54,000 Joules
Thus; the electrical energy is 54,000 joules or 54 kJ
While the furnace is operating, heated air and flue products spill out of burner compartment. what is the problem?
Answer:
ligma
Explanation:
An atom with an imbalance of electrons to protons is
An ion is an atom that is electrically charged by gaining or losing one or more electrons.
To understand it better:
An atom has a nucleus with electrons around it and has a neutral charge. When an electron is added or detached, this atom is electrically charged, that is, it ceases to have a neutral charge and becomes an ion.
In this sense, there are two types of ions:
-Anions: ions negatively charged, by the gain of electrons in the atom.
-Cations: ions positively charged, by the loss of electrons in the atom.
Final answer:
An atom that has an unequal number of electrons and protons is called an ion. This imbalance creates an ion with a net positive or negative charge, called a cation or an anion respectively.
Explanation:
An atom with an imbalance of electrons to protons is known as an ion. Atoms are normally electrically neutral because they have an equal number of protons and electrons. However, when atoms gain or lose electrons, they become ions, which can be either positively or negatively charged. This imbalance in charge leads to electrical forces that can cause the ion to interact with other ions or molecules.
A positive ion, called a cation, is formed when an atom loses one or more electrons. Conversely, a negative ion, referred to as an anion, is created when an atom gains electrons. The process of an atom becoming an ion is called ionization, and these ions play a crucial role in chemical reactions and the formation of compounds.