when a beta particle is emitted from the nucleus, how does the atomic number and the mass number change?

Answer:

To holds the legs apart without rupturing any vein

Explanation:

The purpose of using string to tie the forelegs and hind legs during dissection is to hold the legs apart without rupturing ant vein or artillery for easy dissection procedure( the dismembering of the body of a deceased animal or plant to study its anatomical structure)

when tieing the forelegs and the hind legs the same string is used to tie them and the string is then passed/looped under the dissecting table/tray this way the legs will be held apart and the dissection can commence.

The Western USA is a region of the United States

Group of answer choices Wind Turbine[ Choose ]

No carbon dioxide produced Photovoltaic Tar Sands Mountain top Removal Geothermal Power

Albert Einstein[ Choose ] No carbon dioxide produced Photovoltaic Tar Sands Mountaintop Removal Geothermal

PowerCoal[ Choose ] No carbon dioxide produced Photovoltaic Tar Sands Mountaintop Removal Geothermal

PowerAlberta, Canada[ Choose ] Tar Sands No carbon dioxide produced Mountaintop Removal Geothermal Power

Albert EinsteinWestern USA[ Choose ] No carbon dioxide produced Photovoltaic Tar Sands Mountaintop Removal Geothermal

PowerAlbert Einstein is related to the theory of relativity.

The Wind Turbine is a device that converts the kinetic energy of wind into mechanical energy.

No carbon dioxide is produced in photovoltaic, Geothermal Power, and Wind Turbine as they do not involve combustion.

A tar sand is a sandstone that contains bitumen.

Mountaintop Removal is the practice of mining through the summit of a mountain.

Coal is a combustible black or brownish-black sedimentary rock.

Alberta, Canada is one of the largest oil reserves in the world, known as Tar Sands.

Finally, the Western USA is a region of the United States.

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The ratio of the canister's velocity, as measured on Earth, to the speed of light is 0.972c/c = 0.972. The ratio of the canister's velocity, as measured on Earth, to the speed of light is 0.172c/c = 0.172.

a) If the canister is shot directly at Earth, we need to use the relativistic velocity addition formula to find the velocity of the canister as measured on Earth. Using v = (v1 + v2)/(1 + v1v2/c^2), we get v = (0.75c + 0.55c)/(1 + 0.75c x 0.55c/c^2) = 0.972c. Therefore, the ratio of the canister's velocity, as measured on Earth, to the speed of light is 0.972c/c = 0.972.

b) If the canister is shot directly away from the Earth, we use the same formula but with v2 being negative. Therefore, v = (0.75c - 0.55c)/(1 - 0.75c x -0.55c/c^2) = 0.172c. Therefore, the ratio of the canister's velocity, as measured on Earth, to the speed of light is 0.172c/c = 0.172.

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Most cells in an organism, such as leaf cells in a plant, are somatic cells. Somatic cells contain two sets of chromosomes, one inherited from each parent, and are diploid. In humans, for example, somatic cells contain 46 chromosomes, arranged in 23 pairs.

On the other hand, reproductive cells, such as sperm and egg cells, are sex cells or gametes. Gametes are haploid, which means they contain only one set of chromosomes, half the number found in somatic cells. In humans, gametes contain 23 chromosomes, which are not arranged in pairs.

The purpose of gametes is to combine during fertilization to produce a zygote, which contains a complete set of chromosomes (i.e., diploid). This ensures that the offspring will have genetic diversity and not be identical to either parent.

The process of reducing the number of chromosomes in gametes from diploid to haploid is called meiosis. Meiosis is a type of cell division that occurs only in gamete cells, and results in the production of four haploid daughter cells, each containing a unique combination of chromosomes.

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Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

Answer:

the visible part of the electromagnetic spectrum is somewhere between 2 and 10 1.24 eV and x rays 1 to 12 keV

Explanation:

the visible part of the electromagnetic spectrum is somewhere between 2 and 10 1.24 eV and x rays 1 to 12 keV

Answer:

Wave-Particle Duality.

The correct option is the third option that is we integrate the negative of the electric field along a path from i to f.

We can find the electrostatic potential at any point due to each individual charge by considering the other charges absent. We then add all the charges algebraically. Hence, the electric potential at a point due to a group of point charges is the algebraic sum of all the potentials due to individual charges. To find the change in the electric potential from point/to point f, we have the following options a. We find the ratio of the electric field to the distance between the points. b. We find the ratio of the distance between the points to the electric field. c. We integrate the negative of the electric field along a path from i to f. d. We integrate the negative of the electric field along a path from f to i. e. We differentiate the electric field with respect to distance along the path from i to f. Hence with this information we can consider that the correct option is the third option that is we integrate the negative of the electric field along a path from i to f.

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Answer:

\(a=0.45\ m/s^2\)

Explanation:

Given that,

The radius of a bend, r = 20 m

Velocity of motorcyclist, v = 3 m/s

The combined mass of motorcyclist and the motorcycle is 50 kg

We need to find the motorcyclist’s centripetal acceleration. The formula used to find the centripetal acceleration is given by :

\(a=\dfrac{v^2}{r}\\\\a=\dfrac{(3)^2}{20}\\\\a=0.45\ m/s^2\)

So, the acceleration of the motorcyclist is \(0.45\ m/s^2\).

Conductor:

Aluminum foil

Insulator:

Plastic

Air

Wood

Soil

Foam

Glass

What is Conductor?

A conductor is a material or substance that allows electric charge to flow freely through it, offering little or no resistance to the flow of an electric current. Common conductors include metals such as copper, silver, and gold.

A conductor is a material or substance that allows electrical current to flow freely through it. This is due to the presence of free electrons that can move easily through the material when an electric field is applied. Common conductors include metals such as copper, silver, and aluminum.

In contrast, an insulator is a material or substance that does not allow electrical current to flow through it easily. Insulators have very few free electrons and resist the flow of electric current. Common insulators include rubber, plastic, glass, and air.

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Answer:

Prats of the bicycle are a seat and tires

Simple Machines are brakes and a handler

The expression for the energy stored in a capacitor is given by:

E = (1/2) * Q * V

where:

E is the energy stored in the capacitor,

Q is the magnitude of the charge on each plate of the capacitor, and

V is the voltage across the capacitor.

So, the correct expression for the energy stored in the capacitor is: QV.

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Each resistor's voltage is proportional to its resistance. So, in a series circuit with a 10- and a 20-resistor in series, the current through both resistors is the same. The voltage across the 20-resistor, on the other hand, is double that of the 10-resistor.

Voltage, often known as electric pressure, electric tension, or (electric) potential difference, is the difference in electric potential between two places. It is the labor required per unit of charge to transfer a test charge between two places in a static electric field. Volt is the derived unit for voltage in the International System of Units (SI).

The voltage between points can be created by the accumulation of electric charge (e.g., a capacitor) or by an electromotive force (e.g., electromagnetic induction in generators, inductors, and transformers). A potential difference can be created on a macroscopic scale by electrochemical processes (such as cells and batteries), the pressure-induced piezoelectric effect, and the thermoelectric effect.

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Answer:

magnet b

Explanation:

because it has a stronger current so it attracts more paper clips

Answer:

1.)When you arrive from school and you smell cookies baking in the kitchen your brain will tell you that you are hungry and that you should go to the kitchen at that point your sense organs like your nose helps you to detect that something is baking(cookies)and your nervous system (brain)will tell you that you are hungry and it will command/direct your brain to go to the kitchen then for you to eat the cookies and drink the milk the digestive system is going go help you to chew,swallow and digest the food which has been taken and when you also run to the kitchen at the beginning your brain will direct your skeletal and muscular system because the skeletons and muscles work hand in hand,and when you finish your meal the body will circulate some nutrients or minerals from the food or snack taken to other parts of the body for energy.

2.)When you sleep the whole body is asleep except the heart which needs to continue circulating blood around the whole system and sometimes the brain may not rest when you are sleeping it may continue to do it's work that's why some people usually sleep walk or sleep talk,it means the brain is not at rest and still doing some things....Thank you for the question I hope it is very useful to you.

The required volume of the gas when pressure remains constant is calculated to be 1029.65 ml.

Charles law gives the relation between temperature and volume when the pressure of the gas is kept constant.

Mathematically, it is given as,

V₁/T₁ = V₂/T₂

It is given that the sample of argon gas occupies 950 mL at 25°C.

So, V₁ = 950 ml

T₁ = 25°C = 25 + 273.15 = 298.15 K

The volume of the gas occupied at 50°C is to be found out.

V₂ = ?

T₂ = 50°C = 50 + 273.15 = 323.15 K

Placing all the values in the above equation, we have,

V₁/T₁ = V₂/T₂

950/298.15 = V₂/ 323.15

V₂ = 950/298.15 × 323.15 = 1029.65 ml

Thus, the required volume is calculated to be 1029.65 ml.

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Maximum theoretical efficiency is 67.2%.

What is Maximum theoretical efficiency?
The utmost efficiency that a heat engine may achieve when working

between two temperatures is known as the Carnot Efficiency.
The degree of heat that the high temperature reservoir runs at ( T Hot ).
The degree of heat in the low temperature reservoir ( T Cold ).
The two temperatures in the case of a car are:

the temperature of the engine's combustion gases ( T Hot ).

The temperature at which the engine's gases are released ( T Cold ).

The maximum theoretical efficiency of this engine is the efficiency of a Carnot engine connected between the same two reservoirs, found from Equation
e C=1− T h

Substitute numerical values:
e C​ =1− 2143.15
703.15
=0.672
=67.2%
Maximum theoretical efficiency is 67.2%.

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The seven types of waves are radio waves, microwaves, infrared, visible,  ultraviolet rays, x-rays and gamma rays.

The electromagnetic spectrum is a broad spectrum consisting of various waves. It contains very long radio waves to very short gamma rays. However, the human eye can detect only a small portion of this spectrum called as visible light.

The other waves that are invisible to the eye have their applications in various fields.

For example, radio waves have the longest waves on the spectrum and are said to have lowest energy. An MRI machine uses these waves to see tissues and bones up close.

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The angular momentum of the moon in its orbit around the earth is 28854.80* 10³⁰ kg.m²/s.

Given that,

Mass of the moon = 7.35 * 10²² kg

Radius of the orbit = 3.84 * 10⁸ m

Let us find the tangential velocity,

v = 2π* r/ T = (2π* 3.84 * 10⁸ )/ 2.36 * 10⁶ = 1022.35 m/s

T is transformed from days to seconds.

T = 27.3 * 86400 sec/ 1 day = 2.36 * 10⁶ s

The formula to find out angular momentum is, L = r *m* v

where, L is the angular momentum

r is the radius

m is the mass

v is the tangential velocity

L = 3.84 * 10⁸ * 7.35 * 10²² * 1022.35 = 28854.80* 10³⁰ kg.m²/s

Thus, the angular momentum of the moon in its orbit around the earth is 28854.80* 10³⁰ kg.m²/s.

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A photon with a wavelength of approximately 203 nm can cause an electron to be emitted from a metal surface with a kinetic energy of 50 eV, assuming the metal has a work function of 4 eV.

hν = \(E_k\) + φ

\(E_k\) = 50 eV x (1.602 x \(10^{-19\)J/eV) = 8.01 x \(10^{-18\) J

Assuming the metal has a work function of 4 eV (typical for many metals), we can rearrange the equation to solve for the frequency of the photon:

ν = (\(E_k\) + φ) / h

ν = (8.01 x \(10^{-18\) J + 4 eV x (1.602 x \(10^{-19} J\)/eV)) / 6.626 x \(10^{-34}\)J.s

ν = 1.47 x \(10^{15\) Hz

The wavelength of the photon can be calculated using the formula:

λ = c / ν

where c is the speed of light (3.00 x \(10^8\) m/s):

λ = 3.00 x \(10^8\) m/s / 1.47 x \(10^{15\)Hz

λ ≈ 203 nm (nanometers)

Wavelength is the distance between two consecutive peaks or troughs in a wave. It is typically denoted by the Greek letter lambda (λ) and is measured in units of length, such as meters (m) or nanometers (nm). Wavelength is an important characteristic of all types of waves, including light waves, sound waves, and electromagnetic waves.

The wavelength of a wave is determined by its frequency and speed. Higher-frequency waves have shorter wavelengths, while lower-frequency waves have longer wavelengths. Similarly, waves traveling at higher speeds have longer wavelengths, while waves traveling at lower speeds have shorter wavelengths. The concept of wavelength is fundamental to many areas of physics, including optics, quantum mechanics, and electromagnetism.

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Answer:

Initial velocity = 4 m/s

Explanation:

Acceleration, a = 1.2 m/s²

Final velocity, v = 16 m/s

Initial velocity, u = ?

Time, t = 10 seconds

So, we must use the formula:

v = u + at

Insert all the values into the formula.

16 = u + 1.2 × 10

16 = u + 12

Make 'u' the subject of the equation, and solve to find the value of u.

u = 16 - 12

u = 4 m/s

The radio frequency that will cause transitions between spin states for free neutrons in a 1.2 T magnetic field is4.34x 10^6 Hz.

The Larmor frequency of a particle with magnetic moment μ in a magnetic field B is given by:

f = μB / 2π

For a neutron with magnetic moment μ = -1.91 μn and a magnetic field B = 1.2 T, we can substitute the values and solve for the frequency f:

f = (-1.91 μn)(1.2 T) / 2π = -2.28 x 10^6 Hz

However, this is the frequency for transitions between spin states in a magnetic field of zero. In a non-zero field, the frequency is shifted by a factor called the gyromagnetic ratio, which is approximately equal to 1.91. Therefore, the correct frequency is:

f = 1.91(-2.28 x 10^6 Hz) = -4.36 x 10^6 Hz

But the question asks for a positive frequency, so we take the absolute value:

f = 4.36 x 10^6 Hz

This is still not the final answer, because the question asks for the frequency in a radio wave, which is in the range of MHz to GHz. Therefore, we need to convert the frequency from Hz to MHz:

f = 4.36 x 10^6 Hz / 10^6 = 4.34 MHz

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The maximum value of the average normal stress in the links connecting (a) points b and d is 101.56MPa and (b) points c and e is -21.7MPa.

Stress refers to the measure of an external force acting over the cross-sectional area of an object and is given as units of force per area: N/m2 (SI) or lb/in2 (US). The SI units are commonly referred to as Pascals (Pa). There are two types of stress experienced by normal stress and shear stress. When a force acts perpendicular to the surface of an object, it exerts a normal stress while when a force acts parallel to the surface of an object, it exerts a shear stress. In order to determine the average normal stress in the links provided, consider the bar ABC as a free body as attached. The moment of a force is the product of the force and the distance from the axis of rotation. Hence,

∑Mc = 0 where Mc is the summation of moment at point C

(0.04)FBD – (0.025 + 0.04)(20x10^3) = 0

(0.04)FBD – 1.3x10^3 = 0

FBD = 32.5x10^3 N (Link BD is in tension)

∑MB = 0 where MB is the summation of moment at point B

-(0.04)FCE – (0.025)(20x10^3) = 0

-(0.04)FCE – 0.5x10^3 = 0

FCE = -12.5x10^3 N (Link CE is in compression)

Net area of one link in tension = (0.008)(0.036-0.016) = 160x10^-6 m^2

Hence for two parallel links A = 320x10^-6 m^2

Net area of one link in compression = (0.008)(0.036) = 288x10^-6 m^2

Hence for two parallel links A = 576x10^-6 m^2

a) σBD = FBD/A = 32.5x10^3/320x10^-6 = 101.56x10^6 = 101.56MPa

b) σCE = FCE/A = -12.5x10^3/576x10^-6 = -21.7x10^6 = -21.7MPa

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Answer:

Harder

Explanation:

The more force that is exerted on an object the greater the resulting velocity. Using Newton’s 2nd law:

Force = Mass x Velocity

we can derive for Velocity to show that

Velocity = Force/Mass

So, the more force on an object (of any mass) the greater the velocity.

hope that helps :)

Answer:

200 meters+1000 meters+800 meters=2000 meters or 2km

Explanation:

1km=1000m

The standard deviation of the process is 0.55. With z = 3, is the fast-food operation currently capable of meeting management specifications. = 0.49, so the process is not capable of meeting management specification. Hence option A is correct.

Process capacity () is a metric that accounts for both process variability and process departure from the goal specification. It is determined as the smaller of two ratios: the ratio of the difference between the target specification and the process mean divided by three times the process standard deviation; and the ratio of the difference between the upper and lower specification limits divided by three times the process standard deviation.

= min[(USL - x)/(3σ), (x - LSL)/(3σ)]

where USL is the upper specification limit, LSL is the lower specification limit, x is the process mean, and σ is the process standard deviation.

= min[(12.65 - 11) / (3 × 0.55), (11 - 9.35) / (3 × 0.55)] = min[0.49, 1.17] = 0.49

Since the number is below 1, the process cannot satisfy management requirements. The correct response is (a), meaning that the process cannot fulfil management specifications since = 0.49.

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Answer:

b. 2.27 N

Explanation:

Fe = (k)(Q1)(Q2) / d²

k ≈ 9 × 10⁹ N m² / C² [Coulomb's Constant] or 8.98 × 10⁹ (nearest hundredth).

q = particle charge [Coulombs; C]

d = distance [Meters; m]

Fe = Electrostatic force [Newtons; N]

________________________________

Fe = (9×10⁹)(3.5 × 10^(-8)(-4.5 × 10^(-6))/(.25)² N =

(9)(3.5)(-4.5) × (10^(9))(10^(-8))(10^(-6) / (.25)² N =

(9)(3.5)(-4.5) × (10^(9 - 8 - 6)) / (.25)² N =

(-141.75) × 10^(-5) / (.0625) N =

141.75 × 10^(-5) / (.0625) N

[opposite direction] =

(1.4175 × 10^(2)) × 10^(-5) / (.0625) N

[opposite direction] =

1.4175 × 10^(-3) / .0625 N

[opposite direction] =

1.4175 × 10^(-3) / 6.25 × 10^(-2) N =

14.175 / 6.25 N [opposite direction] =

2.268 N ≈ 2.27 N [opposite direction].

Answer:

A- The image of the moon on the waters surface is distorted.

Explanation: