The graph shows neutron number versus proton number for stable nuclei. What conclusions can be drawn from the graph

The radius of a nucleus is determined by measuring the energies of alpha or other particles that are scattered by it. The radius of a nucleus, in general, is determined by determining the nuclear density.

The density of the nucleus is roughly constant, implying that the radius is proportional to the cube root of the nucleon number.For example, the radius of a 208Pb nucleus is given by the following equation:r = r0A1/3, whereA is the mass number of the nucleus,r0 is a constant equal to 1.2 × 10−15 m.Using this equation.

Thus, the approximate radius of a 208Pb nucleus is 6.62 × 10−15 m.Part B:What is the value of A for a nucleus whose radius is 3.0 × 10−15 m?The radius of a nucleus, in general, is determined by determining the nuclear density. The density of the nucleus is roughly constant, implying that the radius is proportional to the cube root of the nucleon number.

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Answer:

the world won't move with out kinetic energy

Explanation:

We are not heavy enough to move the ground. Gravity is much stronger than our tiny jump

Answer:

because of the gravity of the earth and the mass. you cant move that much because you fell that instantly

Answer:

Electronics (mainly), discovery of quantum mechanics, transistors, element properties, etc.

Explanation:

Great question. I think that it's widely agreed upon that the existence of handheld gadgets, as well as most electronics such as these, came from the advent of quantum mechanics (QM). Quantum mechanics allowed us to look at the behavior of electrons, as they are different from everyday objects. You can think of QM at the interface of chemistry and physics. Quantum mechanics is important, considering it predicts how electrons have to flow through your phone. This was especially helpful in determining their behavior regarding solid materials like the ones that make up your phone. Also, there are several materials that go into a phone, among these certain elements, such as silicon (a semiconductor) and copper/silver, which are great at conducting electrons. Eventually we started using things called transistors, which can amplify and switch electronic signals when needed. These can thought to be a direct product of QM. There are also all kinds of diodes and things that can emit light, among other things.

Also, you have to get the electricity from somewhere, and that can come from a controlled chemical reaction that you can charge right in your phone! That is basically what a battery does, it converts chemical energy (using chemical reactions) into electrical energy that powers your phone. So in short, electronics, chemistry of materials (governed by physics) and especially understanding of how electrons work with tiny transistors in your phone come together to even show you this answer. Wow.

The mechanism that is responsible for the formation of snowflakes is the nucleation of ice crystals.

This is defined as a piece of snow which falls from the sky as a result of an extremely cold climate condition and is common in the arctic regions of the world.

Snow flakes are formed when ice crystals stick together to form the flakes which usually has a dust or pollen being formed around the area being talked about.

This is also regarded as a type of precipitation such as rain etc and is therefore the most appropriate choice.

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The reason for the initial angular momentum is law of conservation of momentum and its value is constant.

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Answer:

Since the two colliding objects travel together in the same direction after the collision, the total momentum is simply the total mass of the objects multiplied by their velocity.

Explanation:

The induced current produced due to moving sliding rod having resistance 0.05 is 2.4 A.

Induced current:

Any change in the magnetic field associated with a coil of wire will cause an emf to be induced in the coil. This emf is called induced emf and if the conductor circuit is closed, current will also circulate through the circuit. This current is called induced current.

Given, length of sliding rod, l= 0.1 m

Magnetic field = 0.60T

Velocity = 2m/s

Resistance of the loop = 0.05

Emf Induced = Blv

induced current = Blv/R

\(i = \frac{0.6 \times 0.1 \times 2}{0.05} \)

\(i = \frac{0.12}{0.05} \)

\(i = 2.4\)

so, the current produced in sliding rod moving withspeed of 2m/s in magnetic field 0.6 T and having resistance of loop 0.05, is 2.4 A

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Answer:

Rocks from early Earth that contained copper are red in color

Explanation:

"Copper, a red mineral, reacts with oxygen to form a green-colored compound. In early years, rocks containing copper were red. This fact shows that there was no oxygen in the early atmosphere to oxidize red copper into the green-colored compound."

The momentum of the car = 12978.9 kgm/s

The mass of the car, m = 1881 kg

The speed, v = 6.9 m/s

The momentum, ρ, is given by the formula:

ρ = mv

Substitute m = 1881, v = 6.9 into the formula

ρ = 1881 x 6.9

ρ = 12978.9 kgm/s

The momentum of the car = 12978.9 kgm/s

The correct statement is "I only." One of the pre-loss objectives of risk managers is to meet any legal requirements the company may face.

The use of fire-resistive materials when constructing a building is an example of risk control. This is because risk control involves taking proactive steps to reduce the likelihood or severity of loss when an incident occurs. Fire-resistive materials are designed to withstand fire, and they are meant to slow down or contain the spread of fire in a building, thus reducing the risk of loss or damage.

In risk management, risk control is one of the four basic methods used to handle or mitigate risks. The other methods include risk transfer, risk avoidance, and risk retention. Risk transfer involves shifting the risk of loss to another party, such as through insurance or contract agreements. Risk avoidance involves eliminating the activity that could lead to loss or harm, while risk retention involves accepting the risk and dealing with any losses that may occur. As for the second question, the correct statement is "I only."

One of the pre-loss objectives of risk managers is to identify, assess, and evaluate potential risks that could negatively affect an organization. They also work to develop strategies to manage these risks and to ensure that the company is meeting any legal or regulatory requirements. On the other hand, one of the post-loss objectives of risk managers is to minimize the impact of losses that occur. They work to evaluate the effectiveness of the company's risk management strategies and to ensure that the company recovers from the loss as quickly as possible. Maximizing the risk manager's wealth is not a post-loss objective of risk managers.

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Size exclusion chromatography is the method by which scientists determine the molecular size (not the weight), of a particular substance.

Size-exclusion chromatography (SEC), also known as molecular sieve chromatography, is a chromatographic method in which molecules in solution are separated by their size, and in some cases molecular weight. It is usually applied to large molecules or macromolecular complexes such as proteins and industrial polymers.

Typically, when an aqueous solution is used to transport the sample through the column, the technique is known as gel-filtration chromatography, versus the name gel permeation chromatography, which is used when an organic solvent is used as a mobile phase. The chromatography column is packed with fine, porous beads which are commonly composed of dextran, agarose, or polyacrylamide polymers. The pore sizes of these beads are used to estimate the dimensions of macromolecules.

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An ultrasound is a scan of a pregnant womens stomach, to see the baby. Typically they do this to see if the baby is healthy and okay.

Explanation:

Radioactive decay

In nuclear physics, beta decay is a type of radioactive decay in which a beta particle is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide

Answer:

In alpha decay, mass number of the nucleus decreases by 4 unit and atomic number is decreased by 2 unit. Alpha decay : ZAX→Z−2A−4Y+24He. When a parent nucleus emits an electron (beta particle) along with the daughter nucleus, then the nuclear reaction thus is called as beta decay.

Explanation:

1 For a sound wave, the pitch is determined by which wave characteristic?

A - Frequency

2 Which of the following waves cannot be transmitted through a vacuum?

C - Sound waves

3 Which of the following could be the value of a wavelength that is found in the visible region of the electromagnetic spectrum?

B - 5 × 10^-7 m

4 Sophie is trying to measure the speed of sound. She stands 24.0 m away from a wall and claps repeatedly, changing the frequency until the echo synchronized with her claps. If she calculates the speed of sound as 325 m • s-1 how long did she wait between claps?

The time between her claps and the echo is twice the time it takes for the sound to travel from her to the wall. Therefore, the time between her claps is:

time = distance/speed = 2 x 24.0 m/325 m/s = 0.148 seconds (to three significant figures).

So the answer is 0.148, without units and correct to three significant figures

Answer: A

Explanation:

Explanation:

centripetal force is a force that makes a body follow a curved path. for example, twirling,a lasso, cream seperator etc.

A force that causes an objectmoving in a circular path to move out and away from the centres of it's path is centrifugal force. for example,drifting, banked roads, washing machine etc.

Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. for example, stirring batter, stone tied to a string etc

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Answer:

constellation is just a name for a set of stars that are perceived, from an earth viewpoint, to make a form in tge night sky…. the Plough, the Great Bear, for example. A galaxy is a formation of stars that are revolving around a centre, our own solar system lies in the outer edge of the galaxy known as the Milky Way.

Explanation:

A highway department is studying the relationship between traffic flow and speed. Traffic flow is the movement of individual drivers and vehicles between two points, as well as their interactions with one another.the value of the coefficient of determination is R− sq = 0.984

Speed is one of the basic parameters of traffic flow, and the two representations of speed are time mean speed and space mean speed. Enter data in excel. Make new column for values x2.,Now click on Data->Data Analysis and select regresion. In y data range, give range of y values. In x data range, give range of x and x2 values. Click ok.

From the above output:

The estimated regression equation is: y = 612.223+26.215x0.233.x

The coefficient of determination is: R− sq = 0.984

The F test statistic is: F= 90.14

The exact p-value is 0.0021. Therefore, correct option is: less than 0.01.

Can conclude a curvilinear relationship exists for traffic flow and speed because p-value is very small.

When x = 39

y =612.223 + 26.215(39)-0.233(39)2: 1280.58= 1281

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Answer:

first negative and then positve

Temperature is a measure of the average kinetic energy  energy of particles in a substance.

Temperature and kinetic energy have a directly proportional relationship.

Kelvin, Celsius, and Fahrenheit are three types of Temperature scales.

The average kinetic energy of the particles in a substance is measured by temperature. The overall kinetic energy of the particles in a substance is measured by its thermal energy. The temperature and thermal energy of a substance increase with particle mobility.

The average kinetic energy of a substance's particles is directly proportional to the substance's temperature.

The three temperature scales that are now in use are Kelvin, Celsius, and Fahrenheit.

Typically, calories or joules per gramme per degree Celsius are used as the units of specific heat. For instance, water has a specific heat of 1 calorie (or 4.186 joules) per gramme per degree Celsius.

Temperature is a measurement of that energy in substances, whereas kinetic energy is the energy of motion.

Temperature is a measurement of that energy in substances, whereas kinetic energy is the energy of motion. According to Zoe, a material has a temperature of 12 degrees Celsius. What does this indicate to Zoe regarding the substance? It has an average kinetic energy of 12 Celsius.

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Temperature is a measure of the average kinetic energy  energy of particles in a substance.

Temperature and kinetic energy have a directly proportional relationship.

Kelvin, Celsius, and Fahrenheit are three types of Temperature scales.

The average kinetic energy of the particles in a substance is measured by temperature. The overall kinetic energy of the particles in a substance is measured by its thermal energy. The temperature and thermal energy of a substance increase with particle mobility.

The average kinetic energy of a substance's particles is directly proportional to the substance's temperature.

The three temperature scales that are now in use are Kelvin, Celsius, and Fahrenheit.

Typically, calories or joules per gramme per degree Celsius are used as the units of specific heat. For instance, water has a specific heat of 1 calorie (or 4.186 joules) per gramme per degree Celsius.

Temperature is a measurement of that energy in substances, whereas kinetic energy is the energy of motion.

Temperature is a measurement of that energy in substances, whereas kinetic energy is the energy of motion. According to Zoe, a material has a temperature of 12 degrees Celsius. What does this indicate to Zoe regarding the substance? It has an average kinetic energy of 12 Celsius.

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(i) The hydraulic gradient is 0.45.

(ii) The flow rate is approximately 0.00000167 cubic meters per second.

(iii) The hydraulic conductivity is approximately 0.000037 meters per second.

(i) Hydraulic gradient:

The hydraulic gradient (i) can be calculated by dividing the head difference (h) by the distance (L) between the manometer tappings:

i = h / L

Given:

Head difference (h) = 45 mm

Distance between manometer tappings (L) = 100 mm

Converting the units to meters:

h = 45 mm / 1000 = 0.045 m

L = 100 mm / 1000 = 0.1 m

Substituting the values into the formula:

i = 0.045 m / 0.1 m = 0.45

(ii) Flow rate:

The flow rate (Q) can be calculated using the equation:

Q = (V / t) / A

Where V is the quantity of water collected, t is the duration of the test, and A is the cross-sectional area of the test sample.

Given:

Quantity of water collected (V) = 500 ml = 0.5 L

Duration of test (t) = 300 seconds

Diameter of test sample (d) = 100 mm

Converting the units to meters:

V = 0.5 L = 0.5 / 1000 = 0.0005 m³

t = 300 seconds

d = 100 mm / 1000 = 0.1 m

Calculating the cross-sectional area (A) using the formula for the area of a circle:

A = π * (d/2)^2

Substituting the values:

A = π * (0.1/2)^2 = π * 0.005^2 = 0.00007854 m²

Substituting the values into the formula for flow rate:

Q = (0.0005 m³ / 300 s) / 0.00007854 m²

Calculating the flow rate:

Q = 0.00000167 m³/s

(iii) Hydraulic conductivity:

The hydraulic conductivity (K) can be calculated using Darcy's Law:

K = Q / (A * i)

Given the values we calculated:

Q = 0.00000167 m³/s

A = 0.00007854 m²

i = 0.45

Substituting the values into the formula:

K = 0.00000167 m³/s / (0.00007854 m² * 0.45)

Calculating the hydraulic conductivity:

K ≈ 0.000037 m/s

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QUESTION 10: The feedback operated on the radiative forcing from the previous question is the Ice-albedo feedback.

QUESTION 11: The Ice-albedo feedback is a positive feedback.

QUESTION 12: A positive feedback can either warm or cool the climate, depending on the sign of the initial forcing. This statement is True.

QUESTION: The feedback in question is a positive feedback.

QUESTION 8: The radiative forcing that allowed the Earth to escape from the Snowball and return to "normal" temperatures was caused by Volcanoes.

QUESTION 9: The forcing from volcanoes was a positive forcing.

QUESTION 4: The change in chemical weathering would increase the amount of CO2 in the atmosphere.

QUESTION 5: The increase in CO2 would warm the planet.

QUESTION 6: The feedback that operated on the radiative forcing to bring about Snowball Earth was the Ice-albedo feedback.

QUESTION 2: If all of the Earth's continents were located near the equator 700 million years ago, it would not affect the rate of chemical weathering of rocks.

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Answer:

there are conversion scales used for doing that

to convert Celsius to Fahrenheit we use the formula,

T(°F) = T(°C) × 9/5 + 32

and to convert Fahrenheit to Celsius we use,

T(°F) = T(°C) × 5/9 + 32

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Explanation:

Answer:

"total" resistance

The current will have the option of going thru more than 1 resistor so the total resistance of the circuit will be less than any resistance in the circuit.

The principle of cross-cutting relationships states that a fault or intrusion is younger than the rocks that it cuts. The fault labeled 'E' cuts through all three sedimentary rock layers (A, B, and C) and also cuts through the intrusion (D). So the fault must be the youngest formation that is seen.

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Answer: The principle of cross-cutting relationships states that a fault or intrusion is younger than the rocks that it cuts through. The fault cuts through all three sedimentary rock layers (A, B, and C) and also the intrusion (D). So the fault must be the youngest feature.

The velocity of first object after the collision is 16.62cm/s and the velocity of second object after collision is 32.783cm/s.

Given initial mass of object (m1) = 26g = 26x10-3kg

initial velocity of object (u1) = 19cm/s = 0.19m/s

mass of second object (m2) = 11g = 11x10-3kg

initial velocity of second object (u2) = 15cm/s = 0.15m/s

Let the velocity of first object after collision = v1

the velocity of second object after collision = v2

These objects are elastically collided. Then from law of conservation of momentum we can see that m1u1+m2u2 = m1v1+m2v2

Here kinetic energy is also conserved. Then

1/2m1u1^2 + 1/2m2u2^2 = 1/2m1v1^2 + 1/2m2v2^2

Then v1 = (m1-m2)/(m1+m2)×v1 + 2×m2/(m1+m2)×v2

v1 = (26-11)/(26+11)×(19) + 2×(11)/(26+11)×(15)

v1 = 7.702 + 8.918 = 16.62cm/s

Then v2 = 2×m1/(m1+m2)×v1 + (m2-m1)/(m1+m2)×v2

v2 = 2×(26)/(26+11)×(19) + (11-26)/(26+11)×(15)

v2 = 26.702 + 6.081 = 32.783cm/s

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Air pressure becomes lower as water molecules are added to the air because water molecules have a lower molecular weight than the nitrogen and oxygen molecules that make up the majority of the atmosphere.

As water evaporates from a surface and enters the air, it displaces some of the heavier gas molecules and decreases the overall density of the air. This decrease in density leads to a decrease in air pressure, which is the force exerted by air molecules on surfaces.

Moreover, water molecules can absorb some of the energy from air molecules through hydrogen bonding, which causes the air molecules to move slower and collide less frequently, leading to a lower pressure. This is because the water molecules attract the air molecules, slowing them down and making it harder for them to hit a surface.

The decrease in air pressure due to water vapor is significant in weather patterns, as humid air masses tend to have lower air pressure than dry air masses. It can also affect the performance of machinery that relies on air pressure, such as engines and turbines.

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The force required to accelerate  is 28 N.The acceleration of a cart with a mass of 25 kg and applied force of 50 N is 2 m/s².

F = ma

F = 3.5 kg x 8 m/s²

F = 28 N

Acceleration that cart

The acceleration of a cart with a mass of 25 kg and applied force of 50 N is calculated as follows;

a = F/m

a = 50/25

a = 2 m/s²

Mass of the block of ice

The mass of a block of ice that is accelerated to 6 m/s2 by a force of 3 Newtons is calculated as follows;

m = F/a

m = 3 N / 6 m/s²

m = 0.5 kg

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The magnitude of the boat’s acceleration while it travels 12.0 m is b. 2.5 \(ms^{-2}\)

u= 9.5 \(ms^{-1}\)

v= 5.5 \(ms^{-1}\)

s= 12 m

From the given data we can use,

\(v^{2} -u^{2} =2as\)

to calculate acceleration.

\(v^{2} -u^{2} =2as\),

Where,

v is the final velocity,

u is the initial velocity,

a is the acceleration and

s is the distance covered.

Substituting the values we have,

\(v^{2} -u^{2}\)= 2×a×s

\((5.5)^{2}\) - \((9.5)^{2}\)= 2 ×a×12

a= \(\frac{(5.5)^{2} -(9.5)^{2}}{(2)(12)}\)

a= \(\frac{(30.25)^{2} -(90.25)^{2}}{(24)}\)

a=\(\frac{-60}{2000}\)

a=-2.5 \(ms^{-1}\)

(The negative sign says that it is a negative acceleration  )

Therefore the magnitude of the boat's acceleration is -2.5 \(ms^{-1}\)

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