Identify the following as Newton's 1st, 2nd, or 3rd Law.
All dropdowns have the same options.

Answer:

The dog's mass is 15.3kg.

Explanation:

Given that the formula for kinetic energy is k.e = 1/2×m×v² where m represents mass and v is the velocity. Then, you have to substitute the following values into the formula :

\(k.e = \frac{1}{2} \times m \times {v}^{2} \)

Let k.e = 6000,

Let v = 28,

\(6000 = \frac{1}{2} \times m \times {28}^{2} \)

\(6000 \div 784 = \frac{1}{2} \times m\)

\( \frac{1}{2} \times m = \frac{375}{49} \)

\(m = \frac{375}{49} \div \frac{1}{2} \)

\(m = \frac{375}{49} \times 2\)

\( m = \frac{750}{49} \)

\(m = 15.3kg \: (3s.f)\)

Answer:

The work efficiency formula is efficiency = output / input, and you can multiply the result by 100 to get work efficiency as a percentage. This is used across different methods of measuring energy and work, whether it's energy production or machine efficiency.

Explanation:

Hope this helped!!!

Using the visual spectrum, we can distinguish between various light wavelengths.

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Answer:

D is the answer

Explanation:

6.45×7.44= 47.98800

Which if we round of we get 48m

The object with the highest mass is the one on planet D. This is because mass is a measure of the amount of matter an object contains, and is not affected by gravity. Therefore, although the weight of the object on planet D is lower than that of the other planets, its mass remains the same.

Weight, on the other hand, is a measure of the gravitational force acting on an object. Therefore, the weight of an object will vary on different planets due to different gravitational forces. As shown in the drawings, the object on planet A has the greatest weight, but nevertheless the greatest mass.

In summary, the object with the greatest mass is on planet D, while the object with the greatest weight is on planet A.

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the answer is speaker it transform electrical energy into sound energy

Answer:

Lightbulb.

Electric stove element.

Electric space heater.

lightning but it's not a device

Explanation:

Lightning converts electrical energy into light, heat and sound energy

The term you are looking for is "chemical battery". Chemical batteries work by converting chemical energy into electrical energy through a series of chemical reactions. These reactions take place within the battery's cells, which are composed of two electrodes and an electrolyte.

When the battery is connected to a circuit, the chemical reactions produce an electrical current that can be used to power devices. Chemical batteries are widely used in many applications, including consumer electronics, electric vehicles, and renewable energy systems. They are a crucial component of our modern technological society, and ongoing research is focused on developing more efficient and sustainable battery technologies to meet growing energy demands.

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Answer:

Your a genius!

Explanation:

When an object travels in a circle, it experiences a centripetal force which is directed towards the center of the circle. This force is given by:

F = m * v^2 / r

where F is the centripetal force, m is the mass of the object, v is its speed, and r is the radius of the circular path.

In this case, the mass of the vehicle is 1500 kg, the speed is 22 m/s, and the radius of the circle is 85 m. Plugging these values into the equation above, we get:

F = 1500 kg * (22 m/s)^2 / 85 m = 906.35 N

So, the centripetal force acting on the vehicle is 906.35 N.

The direction of the centripetal force is towards the center of the circle, which provides the necessary force to keep the vehicle moving in a circular path.

In conclusion, when a 1500-kg vehicle travels at a constant speed of 22 m/s around a circular track that has a radius of 85 m, it experiences a centripetal force of 906.35 N, which is directed towards the center of the circular path. This force is necessary to maintain the circular motion of the vehicle and prevents it from moving in a straight line.

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The diameter of sun is 1.392 million km. It is the smallest among the given distances. Then, distance from the sun to planet Neptune and the largest here is distance from earth to Sirius , i e., 8.6 light years.

Light year is a unit used to express the distance between planets or between planets and stars.

One light year = 9.46 × 10¹² kilometers.

The diameter of sun = 1.39 million km = 1392000 km.

distance of sun from the planet Neptune is 9.46 trillion years = one light year.

Then, distance from earth to star Sirius is 8.6 light years. This the the largest distance among the three.

Hence, the order of distance from largest to smallest is diameter of sun, distance from sun to Neptune and distance from earth to Sirius.

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Answer:

is d

Explanation:

There is no constant speed parameter ß that can satisfy the given conditions. The problem is not solvable as it leads to contradictory equations.

To determine the constant speed parameter ß required for the trip, let's break down the problem step by step.

1. Let's assume the daughter's age is represented by D and the father's age is represented by F.

2. We are given that the father is 22.00 years older than his daughter, so we can write the equation:
  F = D + 22.00

3. The father wants to travel outward from Earth for 3.000 years and then back to Earth for another 3.000 years. This means the total time elapsed for the father's journey is 6.000 years.

4. After the journey, the father wants to be 22.00 years younger than his daughter. So we can write the equation:
  F + 6.000 = D - 22.00

5. Now we have two equations:
  F = D + 22.00
  F + 6.000 = D - 22.00

6. We can solve this system of equations to find the values of F and D. Subtracting the first equation from the second equation gives:
  F + 6.000 - F = D - 22.00 - (D + 22.00)
  6.000 = -44.00

7. This is not a valid equation, which means there is no solution to the problem. The constant speed parameter ß cannot be determined in this case.

In summary, there is no constant speed parameter ß that can satisfy the given conditions. The problem is not solvable as it leads to contradictory equations.

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D. endure for many years and keep destroying ozone. Three oxygen atoms (O3) make up the chemical known as ozone, which is present in the Earth's atmosphere.

Three oxygen atoms make up the gas known as ozone, which is present in the Earth's atmosphere (O3). By absorbing dangerous UV light from the sun, it serves a crucial part in safeguarding life on Earth. A hole in the ozone layer over Antarctica has been caused by human activities like the creation of chlorofluorocarbons (CFCs), which have harmed the ozone layer. This hole makes the Earth's surface more vulnerable to dangerous UV light, which can harm crops and marine life as well as cause skin cancer. The ozone layer is no longer being destroyed as quickly because to efforts to minimise the usage of CFCs, but further monitoring and conservation measures are still required.

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Answer:

11.1s

Explanation:

Given parameters:

Height of cliff  = 600m

Unknown:

How long it takes to hit the ground  = ?

Solution:

To solve this problem, we use one of the kinematics equation;

    H  = ut  +  \(\frac{1}{2}\)gt²  

H is the height

u is the initial velocity  = 0m/s

t is the time taken

g is the acceleration due to gravity

             600 = \(\frac{1}{2}\) x 9.8 x t²  

              600  = 4.9t²  

                 t²  = 122.5

                 t  = 11.1s

The expected chain length (number of repeating units per chain) that would be formed in the experiment, assuming all initiators initiate chains and all monomers add onto the chains can be calculated using the following formula.

Expected chain length = (Number of moles of monomers used/Number of moles of initiators used) + 1Where,+ 1 denotes the length of the initiator's unit and is added to the average number of monomer units. Hence, it indicates the length of the polymer's first unit.The number of moles of monomers used can be determined as follows

The number of moles of initiators used can be determined as follows:Number of moles of initiators = (Mass of initiators used/Molecular weight of initiators)Example:If the mass of monomers used is 0.05 g and the molecular weight of monomers is 100 g/mol, then the number of moles of monomers used

= (0.05/100) mol

= 5 × 10⁻⁴ molIf the mass of initiators used is 0.01 g and the molecular weight of initiators is 200 g/mol

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Answer:

D. Registered dietitian

Answer:

D

Explanation:

The magnitudes of the accelerations of the two carts are equal.

Two carts are labeled A and B, and each cart is moving with constant acceleration. The velocities of each cart are measured at a start time t1 and a finish time t2 (same start and finish time for both carts). The magnitudes of the accelerations of two carts are the same. According to the given diagram, it is observed that the direction of velocity in both carts is in the same direction. The magnitudes of the velocity for Cart A and Cart B at time t2 are the same.

Therefore, the magnitudes of the accelerations of both carts will be the same, and the direction of acceleration will be the same as the direction of velocity.

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Answer:

Explanation:

Since the forces are only in the x-direction, you could just add the two forces. The West is to the left, so it would be -25N with the negative sign indicating direction. The East is to the right, so that would be +50N.

50 + (-25) = 25N to the right or the positive i-hat direction

Answer:

3.mechanical is the answer

Mechanical energy is missing in the windmill energy transformation.

Wind> Mechanical> Electrical. Hence option (3) is correct.

The process of using the wind to produce mechanical or electrical energy is known as wind power or wind energy. The kinetic energy of the wind is transformed into mechanical power by wind turbines. This mechanical energy can be used to particular activities (such pumping water or grinding grain) or can be transformed into electricity by a generator.

When the project size is created to match the energy requirements of the load while simultaneously monetizing economies of scale and equipment track record, wind turbine economics are maximized. A modest turbine (usually less than 10 kW) that can produce the amount of electricity needed by a residence for daily operation is needed for residential onsite energy consumption.

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Answer:

??????

Explanation:

Answer:

we add salt to conduct electricity

Answer:

D. Increasing resistance and keeping current from A P E X :))

Explanation:

The decreasing resistance and keeping current constant leads decreasing in voltage option (C) is correct.

Voltage is the force applied by the power source to charged electrons in a conducting loop, allowing them to perform tasks such as igniting light.

As we know according to the ohm's law:

V = IR

Where 'V' is the volatge,

'I' is the current.

'R' is the resistance.

If we assume 'I' is constant

Then V∝R

As the resistance increases the voltage increases and vice versa.

Thus, the decreasing resistance and keeping current constant leads decreasing in voltage option (C) is correct.

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The ratio of the speeds of ship B to ship A relative to the space station is approximately 0.647.

The observer on the space station measures the length of the meterstick in both ship A and ship B using a telescope. The measured length of the meterstick in ship A is 0.85 m, while in ship B, it is 0.55 m.

To find the ratio of the speeds of ship B to ship A relative to the space station, we can use the given measurements:

uB/uA = (length of meterstick in ship B) / (length of meterstick in ship A)

    = 0.55 m / 0.85 m

    ≈ 0.647

Therefore, the ratio of the speeds of ship B to ship A relative to the space station is approximately 0.647.

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The area of the trapezoid shown in the question is 110.5 m².

Area is the region bounded by a plane shape.

To calculate the area of the trapezoid, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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Answer: the atom is mostly empty space with a tiny, dense, positively-charged nucleus

Explanation: Rutherford's gold foil experiments involved firing positively charged alpha particles at a piece of gold/metal foil. The alpha particles that were fired at the gold foil were positively charged. Most of the time, the alpha particles would pass through the foil without any change in their trajectories, which is what was expected if JJ Thomson's plum pudding model of the atom was correct. However, occasionally the alpha particles would be deflected to some degree, and sometimes an alpha particle would bounce back directly toward the experimenter. Rutherford likened this to firing a 15-inch artillery shell at a sheet of tissue paper and the shell came back to hit you.

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Rutherford's gold foil experiment demonstrated the concept of the nucleus of the atom.What is Rutherford's gold foil experiment?

Rutherford's gold foil experiment is an experiment that was conducted by Ernest Rutherford in 1911 to determine the structure of the atom. Rutherford bombarded alpha particles at thin gold foil and noted their trajectory and path.The experiment was conducted to answer the prevailing model of the atom's structure, which was the Thomson atomic model.

According to the Thomson atomic model, the atom's positive charge is evenly distributed throughout the atom, like raisins in a pudding. Rutherford's experiment refuted this hypothesis and provided a new model that supported his findings.

The findings of the gold foil experiment:

Rutherford's experiment led him to conclude that the positive charge of the atom is concentrated in the nucleus, a central part of the atom. In this model, electrons orbit the nucleus, like planets orbiting the sun.

Rutherford's gold foil experiment demonstrated that the atom is made up of mostly empty space, with a small, dense, and positively charged nucleus at the center. This discovery paved the way for further research into atomic structure and the discovery of subatomic particles like protons and neutrons.

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To determine the average density of the NaCl crystal, we can use the formula:

Density = (Mass of Na + Mass of Cl) / Volume

The volume of the crystal can be calculated by considering the spacing of adjacent atoms. Since the spacing is given in nanometers (nm), we need to convert it to meters (m) for consistent units.

Given:

Spacing of adjacent atoms = 0.282 nm = 0.282 × 10^(-9) m

Mass of Na = 3.82 × 10^(-26) kg

Mass of Cl = 5.89 × 10^(-26) kg

Now, let's calculate the volume:

Volume = (Spacing of adjacent atoms)^3

Volume = (0.282 × 10^(-9) m)^3

Next, we can calculate the density:

Density = (Mass of Na + Mass of Cl) / Volume

Density = (3.82 × 10^(-26) kg + 5.89 × 10^(-26) kg) / [(0.282 × 10^(-9) m)^3]

Evaluate the above expression to obtain the average density of the NaCl crystal.

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NaCl crystal consists of sodium and chloride ions which interact in a 1:1 ratio confined in a face-centered cubic (FCC) structure. The inter-atomic separation is 0.282 nm. The ions are held together in place by ionic bonds, showing solid NaCl's stoichiometry.

The atoms in a NaCl crystal are arranged in a face-centered cubic (FCC) structure due to the ionic bonds that hold them together. The inter-atomic separation distance is 0.282 nm. Sodium and chloride ions interact in a 1:1 ratio, and their masses are 3.82*10^-26 kg (Na) and 5.89*10^-26 kg (Cl) respectively.

The crystal structure formed by these ions consists of octahedral holes occupied by sodium ions, while chloride ions form the FCC cell. Their interactions are balanced by electrostatic attraction, which also requires significant energy to break. Each unit cell of the crystal lattice contains both sodium and chloride ions, thus maintaining the 1:1 stoichiometry required by the formula NaCl.

The dimensions, structure, and interactions within a NaCl crystal are critical in understanding the properties of this common salt, including its unique crystalline structure, stability, and behavior in chemical reactions.

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Answer:

Option (A).

Explanation:

When a hot and a cold objects come in thermal contact with each other,exchange of heat takes place between them until thermal equilibrium is reached.

In this process thermal energy flows from high temperature to low.

Therefore, when a beaker of boiling water comes in touch with a block of ice,

Thermal energy starts flowing from boiling water to block of ice until equilibrium is established.

Option (A) will be the answer.  

Answer:

45 m/s

Explanation:

162 / 3.6 = 45 m/s

Divide by 3.6 to convert km/h to m/s.

Answer:

c is correct

Explanation:

Steel is a metal that is made from iron and carbon. During the steel making process, iron & carbon are melted together, and is allowed to harden into a solid. The iron and the carbon DO NOT chemically react with each other. After the steel was made, 20 samples were taken from one piece and tested. Each sample contained 98% iron and 2% carbon.

Which of the following terms BEST describes steel? homogeneous mixture

Answer:

The answer is C. Homogeneous Mixture  

Explanation:

In chemistry, a mixture is a material made up of two or more different substances which are physically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids