How could physics be useful in weather prediction?

(b) the presence of technetium in giant star spectra. Astronomers have direct evidence supporting the formation of heavy elements in stars through the observation of certain elements in their spectra.

Here correct answer is B.

One such element is technetium (Tc), which is not naturally occurring on Earth and has no stable isotopes. The presence of Tc in the spectra of certain types of stars, particularly red giants and Mira variables, is a strong indicator of heavy element nucleosynthesis in stars.

This is because Tc is a radioactive element with a short half-life, so any Tc present in a star's atmosphere must have been produced relatively recently through nuclear reactions within the star itself.

Gamma-ray emissions from cobalt 56 decay in supernovae (a) and observed elemental abundances (c) are also used to support the idea of heavy element formation in stars, but they are not direct evidence.

The light curves of type-I supernovae (d) are used to study the expansion and evolution of these events and are not directly related to heavy element formation in stars. Therefore, the correct answer is (b) the presence of technetium in giant star spectra.

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Answer:

Mitochondria and chloroplast are organelles found in a plant cell. However, chloroplast is absent in an animal but mitochondria is found in both. Mitochondria generates energy for the cell in the form of ATP using oxygen and nutrients. Chloroplast is the site for photosynthesis in a plant cell.

The magnitude of the acceleration of the block after the system is released from rest is: ablock = 3.27

What is magnitude?

Just as the magnitude of an earthquake indicates its strength, the magnitude of a mathematical term indicates its magnitude. In mathematics, this means how far a mathematical term is from zero.

For numbers like 1, 2, 3, the magnitude is simply the number itself. If the number is negative, the magnitude is the absolute value of the number. For example, the magnitude of 10 is 10. The magnitude of -10 is the absolute value of -10, which is 10. In both cases, the magnitude is the distance from zero of the mathematical term. Both 10 and -10 are 10 distances from zero.

Thus, The magnitude of the acceleration of the block after the system is released from rest is: ablock = 3.27

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Answer: 15m/s

Explanation:

Answer:

by marketing the product

Answer:

bfhdjfndjckdkfmkfkckfj

Explanation:

hdjdkckfkvkfkfkxkfkck ex XD FB fact trees

The equation If the mass of a solute is known, the formula molar mass of solute = mass of solute/number of moles of solute can be used to calculate its molar mass.

To find a solution?

One mole of a substance is made up of Avogadro's number (6.022 x 1023) of molecules (or formula units) (ionic compound).

The molar mass of a chemical indicates its mass in one mole.

To put it another way, it gives you the quantity of grammes per mole of a substance.

Estimating the mass of the solute

Concentration in g/dm = mass of solute in g

0.358/3=  0.119

Volume in dm = 3.

A sodium chloride solution has a 10 g/dm concentration.

Concentration in g/dm = mass of solute in g

Volume in dm = 3.

3\s = 10 g/dm

0.358× 2 dm 3

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Answer:

when an external force applied on an object

Explanation:

there will be a change in velocity this means it is accelerating

Their relative speed would be 0.8C .

So, Speed of car 1 = v1 = c/2

     Speed of car 2= v2 =-c/2

(-ve sign indicates that car 2 is moving in thw opposite direction of car 1 motion)

Relative speed V 12 = v1-v2 / 1- v1v2/ c^2

= c/2 -(-c/2) / 1- ((c/2) (-c/2)) /c^2 = 0.8 C

Speed is measured because of the ratio of distance to the time wherein the distance became included. Speed is a scalar amount because it has the handiest route and no significance. SI unit of speed is m/s.

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Rotation period for a mass of 0.550 kg at the same radius is 1.45 s.

The rotation period of a mass in circular motion is given by:

T = 2πR/v

where T is the period, R is the radius of the circular path, and v is the velocity of the mass.

For the first mass with a mass of 0.45 kg, radius R of 0.140 m, and period T of 1.45 s, we can calculate the velocity as follows:

v = 2πR/T = 2π(0.140 m)/(1.45 s) = 0.6066 m/s

Now, we can use the velocity and radius values to find the period for the second mass with a mass of 0.550 kg:

T = 2πR/v = 2π(0.140 m)/(0.6066 m/s) = 1.45 s

Therefore, the rotation period for a mass of 0.550 kg at the same radius is 1.45 s.

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Answer:

D Elastic collision because momentum is conserved

Explanation:

this is the answer may i be marked brainliest?

Answer:

1, Coal,oil,natural gas,petroleum ...etc

2, -they pollute the environment

-In case of irresponsible use ,they can be

dangerous

-it is more reliable an renewable

The average density of the full gas can can be calculated by dividing the total mass of the can (2.00 kg) by the total volume (20.0 l).

Density is a measure of the mass of a substance per unit volume. It is an intensive property, which means it is independent of the amount of the substance present.

This gives an average density of 0.100 kg/m3, taking into account both the volume occupied by the steel and the gasoline.

To further break this down, the steel can itself has a density of 7.85 kg/m3 and the gasoline has a density of 690 kg/m3. Therefore, the proportion of the can's volume occupied by the steel is 0.00785 m3 and the proportion of the can's volume occupied by the gasoline is 0.19915 m3. When these proportions are multiplied by their respective densities, it gives the total mass of the steel (0.01553 kg) and the total mass of the gasoline (1.98447 kg). When added together, these two components give the total mass of the full gas can (2.00 kg).

Therefore, the average density of the full gas can (2.00 kg/20.0 l) is 0.100 kg/m3, taking into account both the volume occupied by the steel and the gasoline.

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Answer:

1a: Lead atoms are heavier than aluminum atoms, which means that a given mass of lead contains fewer atoms than the same mass of aluminum. Since the heat required to raise the temperature depends on the number of atoms, it takes less heat to raise the temperature of the lead than the temperature of the aluminum.

The average speed of swimmer is 10 km/hr.

Speed is the rate of change of position of an object in any direction.

Distance is the total movement of an object without any regard to direction.

Given distance of pond is 1 km.

She swims 20 laps , i.e. total distance = 20 * 1 km = 20 km

Time taken to complete = 2 hr

There a relation between speed distance and time which is given by:                      

                         Speed = Distance / Time

                      ⇒Speed = 20/2 = 10 km/hr

So the average speed of swimmer is 10 km/hr.

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Answer:

It is flammable.

Explanation:

Answer:

300,000=3×10^3

.000012=1.2×10^-6

Immediately after the string breaks, the ball will move in a straight line tangent to its circular path.

When the string breaks, the centripetal force that was keeping the ball in circular motion is removed. As a result, the ball will continue to move in accordance with Newton's first law of motion, which states that an object in motion will continue in a straight line at a constant velocity unless acted upon by an external force. Since the ball was moving horizontally in a circle before the string broke, it will continue moving horizontally but in a straight line tangent to the circular path at the exact moment the string broke. This trajectory will be determined by the ball's velocity and the direction in which it was moving at the instant of string failure.

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Answer:

1. c 2.d

Explanation:

we did this in middle school

The oldest stars in the galaxy, known as Population II stars and globular clusters, surround it in the shape of a sphere, tracing the contours of the cloud that gave rise to the galaxy.

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Answer: burning less fossil fuel

Explanation: I did the quick check and it was right :)

Answer:

0.4 g/cm^3

Explanation:

The density of an object can be found using the following formula.

d= m/v

where m is the mass and v is the volume.

The mass of the metal is 6 grams and the volume is 15 centimeters^3

m=6 g

v= 15 cm^3

Substitute these into the formula.

d= 6 g/ 15 cm^3

Divide 6 g by 15 cm^3 (6/15=0.4)

d= 0.4 g/ cm^3

The density of the metal is 0.4 grams per cubic centimeter.

Density = (mass) / (volume)

Density = (6 g) / (15 cm³)

Density = (6/15) (g/cm³)

Density = 0.4 g/cm³

This 'metal' has less than half the density of water, and it floats on water !  It cannot be of Earthly origin, and must have been dropped here by aliens.

Either that, or else the metal has been hammered and stretched and beaten out and shaped so that it has an artificially large volume ... something like the way sailing ships are made out of thick plates of steel.

Answer:-50 J

Explanation:

Answer: -50 N

Explanation:

The statement that describes an energy measurement is one gram of wood stores 16,000 J, therefore the correct answer is option D

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

Thermal energy can be produced with help of various means such as by burning fossil fuels, with the help of solar energy.

The Joule is the recognized unit of measurement for energy (J). Kilowatt/hour (kWh), which is used specifically for electric energy, should be listed among the most used units for measuring energy (in fact it is used to calculate electricity bills). The Terawatt/hour (TWh), or one billion kW/h, is used to calculate the output of big power facilities or the country's consumption.

Thus, The statement that describes an energy measurement is one gram of wood stores 16,000 J, therefore the correct answer is option D

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Answer:

The work done in winding the spring gets stored in the wound up spring in the form of elastic potential energy (i.e potential energy due to change in shape). ... During this process, the potential energy stored in it gets converted to kinetic energy. This turns the wheels of the toy car.

Explanation:

Answer:

Both elastic potential energy and kinetic energy at t initial are converted to internal energy t f.

Explanation:

Apply the principle of Conservation of Energy to the system, where friction is present. Between t i and t f, the elastic potential energy in the spring and the kinetic energy of motion are being transformed into internal energy.

(I can't put t and f together because it got censored so that's why there is a space. Usually they are together.)

Thermodynamics can be said to be a branch of Physics which involves the transfer of heat and other energy forms.

Thermal energy is the energy possesed by a system due to its temperature.

In thermodynamics, during the transfer of thermal energy, energy is wasted due to entryopy. And entropy is the measure of disorder of a system.

Therefore, in amy thermodynamic system that deals with the transfer of thermal energy, the most ideal state for that system is Entropy

ANSWER:

A. Entropy

Answer:

answer should be 10 because the line goes from (0,0) then to (1,10) and so on

Answer:

Explanation:

The work done by an object can be found by using the formula

workdone = force × distance

From the question we have

workdone = 5 × 10 = 50

We have the final answer as

Hope this helps you

La actividad física posee muchos beneficios para la salud. Algunos de estos beneficios son la reducción en el riesgo de padecer enfermedades, control del peso, fortalecimiento de huesos y músculos, etc.

La actividad física regular previene la aparición de enfermedades cardiovasculares al evitar la acumulación de colesterol en las arterias que transportan sangre a diferentes áreas del organismo.

La actividad física consume calorías, especialmente aquellas provenientes de los lípidos (grasas), con lo cual permite controlar el peso y reducir el riesgo de obesidad.

La actividad física también ayuda al fortalecimiento de los tejido oseo, con lo cual previniendo enfermedades relacionadas tales como la osteoporosis.

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The tension in the string supporting the rod and the attached weights is 7.11 N.

The tension in the string supporting the rod and the attached weights is the sum of the weights supported by the strings.

T = (m1 + m2)g

where;

0.4lb + 1.2lb = 1.6lb = 0.725 kg

T = 0.725 x 9.8

T = 7.11 N

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The velocity of the gorilla of mass 50 kg, sitting 4 meters above the ground just before hitting the ground is 8.85 m/s.

Velocity is the rate of change of displacement.

To calculate the velocity of the gorilla, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1 and solve for v

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