Nikolas had an idea that he could use the compressed carbon dioxide in a fire extinguisher to propel him on his skateboard.

Nikolas, the fire extinguisher, and the skateboard have a combined mass of 50 kg. What force would the fire extinguisher have to produce to propel Nikolas if he wanted to accelerate at a rate of 1.2 m/s2? Round your answer to the nearest whole newton.

60 N

Which of Newton’s laws did Nikolas have to use to calculate this force?

Answer:

Explanation:

For every action (or force), there is an equal and opposite action (or force).

If you are referring to the book "Fahrenheit 451" by Ray Bradbury, then the author describes a dystopian society in which books are banned and burned by the government. In the book, the reasons for the ban are not explicitly stated, but it is suggested that the government banned books to control and manipulate the thoughts and actions of the population.

However, if you are referring to a different book by an author named Beatty, please provide more context so I can provide an accurate answer.

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At any crime scene, the two greatest challenges to the physical evidence are contamination and loss of continuity.

In evidence law, physical evidence (also called real evidence or material evidence) is any material object that plays some role in the matter that gave rise to the litigation, introduced as evidence in a judicial proceeding (such as a trial) to prove a fact in issue based on the object's physical characteristics.

The two types of evidence at crime scenes:

Biological evidence (e.g., blood, body fluids, hair and other tissues)

Latent print evidence (e.g., fingerprints, palm prints, footprints)

The biggest impediment to an investigation is the removal or loss of a piece of evidence from the scene of a crime.

Hence, at any crime scene, the two greatest challenges to the physical evidence are contamination and loss of continuity.

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Answer:

10.7 seconds (1d.p)

Explanation:

To find time, do distance over speed. Thus, 139 divide 13 equals 10.7.

as the unit is in m/s. Then 10.7 will be in seconds.

Answer:

A boy runs a distance of 10km at speed of 15km/hr and continues to Moves an acceleration of 1.5m

The current supplied to the phone is 93.75 milliamperes (mA) or 0.09375 Amperes (A).

Part (a) Expression for the average current, I, supplied to the phone:

We can use the formula for electrical power:

Power = current x voltage

The energy lost by the battery each day is given by:

Energy = Power x time

E = P x t

Substituting Power = I x ΔV and time t = 24 hrs, we get:

E = I x ΔV x t

I = E / (ΔV x t)

Therefore, the expression for the average current supplied to the phone is:

I = E / (ΔV x t)

Part (b) Numeric value for the current in Amperes:

Substituting the given values, we get:

I = 6 J / (2.7 V x 24 hrs)

I = 0.09375 A or 93.75 mA

Therefore, the current supplied to the phone is 93.75 milliamperes (mA) or 0.09375 Amperes (A).

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(c) Its water molecules were broken apart, and hydrogen was lost to space.

The evidence that the Venus once used to have water was the deuterium to hydrogen ratio in the atmosphere of Venus is about 150 times of earth.

Proofs are Venus must have started with oceans worth water.

The water is now escaped because when the UV rays from the sun as fallen upon the water the water molecules were broken and hydrogen went to the space.

And therefore, there is no water now present on the planet Venus.

scientist are still finding ways to discover life on the planet Venus and other planets.

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d = vi*t + 0.5*a*t. equation should you use to solve this problem

Speed is the overall distance an item travels in a given amount of time. It is solely based on the size of the moving item. Meter/second is the measurement of speed. A metre per second is the commonly used measurement of speed.

The following is the mathematical formula for speed:

speed equals entire distance / total time

As stated in the challenge, Superman is travelling at 54.5 m/s when he notices a train 850 metres away that is about to crash into a river. In 4.22 seconds, he arrives to the train.

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The strength of the electric force depends on the amount of charge on each object and the distance between them. Electric force, also known as Coulombic force, is a fundamental force of nature that is responsible for the interaction between charged particles. It is a long-range force that can be either attractive or repulsive depending on the charges of the particles involved.

The electric force between stationary charged objects is a force that arises due to the presence of an electric charge. When two or more stationary charged objects are in close proximity to one another, the electric force between them will cause them to attract or repel one another depending on their charges. Like charges repel each other, while opposite charges attract each other. The electric force between two stationary charged objects can be calculated using Coulomb's Law. According to Coulomb's Law, the magnitude of the electric force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Mathematically, the formula for Coulomb's Law is given as F = k * q1 * q2 / r^2, where F is the force, k is Coulomb's constant, q1 and q2 are the magnitudes of the charges, and r is the distance between the charges.

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The current density at t = 0.600 s, given the equation Q = at³ + bt + c, where a = 3.00 A/s², b = 5.00 A, and c = 8.00 A s, and a cross-sectional area of 2.00 cm², is 58240 A/m².

To find the current density, we need to calculate the current (I) at t = 0.600 s and divide it by the cross-sectional area (A) of the conductor. The equation given, Q = at³ + bt + c, represents the amount of charge flowing through a particular point in the conductor at time t. We can differentiate the equation with respect to time to obtain the expression for current, which is I = dQ/dt = 3at² + b.

Substituting the given values of a, b, and t, we get I = 3(3.00 A/s²)(0.600 s)² + 5.00 A = 19.26 A. Now, we can calculate the current density by dividing the current (I) by the cross-sectional area (A). Converting the area from cm² to m² (2.00 cm² = 2.00 × 10⁻⁴ m²), we have current density J = I/A = 19.26 A / (2.00 × 10⁻⁴ m²) = 58240 A/m².

The electric field in vector form when an electron with velocity ✓ = (5.0î + 7.0ĵ + 4.0k) × 10⁶ m/s enters a region with a uniform electric field and a uniform magnetic field, and the magnetic field is given by B = (1.01 – 4.0ĵ + 5.0k) × 10⁻² T, is (26.1 V/m)î + (10.1 V/m)ĵ + (-20.4 V/m)k.

When an electron travels through a region without being deflected, the Lorentz force experienced by the electron due to the magnetic field (F = q(v x B)) is balanced by the electric force (F = qE) due to the electric field present. Setting these two forces equal, we have q(v x B) = qE. Since we are given the velocity (✓) and the magnetic field (B), we can solve for the electric field (E) in vector form.

The electric field vector is given by E = (v x B) / |q|, where |q| is the magnitude of the charge on the electron. Substituting the given values, we have E = [(5.0î + 7.0ĵ + 4.0k) × 10⁶ m/s x (1.01 – 4.0ĵ + 5.0k) × 10⁻² T] / |q|. Simplifying the cross product, we get E = [(35.0 + 20.0 + 28.0) × 10⁴ î + (-5.0 + 20.4) × 10⁴ ĵ + (-7.0 - 5.0) × 10⁴k] / |q|. Taking the magnitude of the electric field vector, we find |E| = √[(35.0 + 20.0 + 28.0)² + (-5.0 + 20.4)² + (-7.0 - 5

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The distance moved the rock is determined as 2 m.

The distance moved the rock is calculated as follows;

P.E = mgh

where;

h = P.E / mg

h = ( 100 J ) / ( 20 kg x 2.5 N/kg)

h = 2 m

Thus, the distance moved by the rock is a function of gravitational potential energy, which is the energy possessed by a body due to its position above the ground.

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If a horizontal, uniform board of weight 125 N and length 4 m is supported by vertical chains at each end and a person weighing 500 N is sitting on the board, the tension in the right chain is 250 N then the tension in the left chain is 375 N.

A horizontal, uniform board of weight 125 N and length 4 m is supported by vertical chains at each end. A person weighing 500 N is sitting on the board.

The tension in the right chain is 250 N. What is the tension in the left chain?

The tension in the left chain is 375 N.

How to find the tension in the left chain?

Here, the weight of the board is W1= 125 N

Weight of the person sitting on the board is W2 = 500 N

Length of the board is L = 4 m

Tension in the right chain is T1 = 250 N

Tension in the left chain is T2

The sum of the tension in both chains will be equal to the weight of the board and the person sitting on the board. i.e., T1 + T2 = W1 + W2.

T2 + 250 N = 125 N + 500 N

T2 = 625 N - 250 N

T2 = 375 N

Therefore, the tension in the left chain is 375 N.

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For the same reason that you can skate around a curve at constant speed but not with constant velocity.

The DIRECTION you're going is part of your velocity, but it's not part of your speed.

If the DIRECTION changes, that's a change of velocity.

The object doesn't have to change speed to have a different velocity. A change of direction is enough to do it.

And any change of velocity is called acceleration.

The force on the proton due to the magnetic field is 1.12×10⁻¹⁵ N.

Force can be defined as the product of mass and acceleration

To calculate the force that acts on the proton due to the field, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the force on the proton due to the magnetic field is 1.12×10⁻¹⁵ N.

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The resistance of a circuit that contains two 50.0 Ω resistors connected in series with a 12.0 V battery is 100 Ω. The resistance of the circuit is equal to the sum of the individual resistors when they are connected in series.

In this case, two 50.0 Ω resistors are connected in series, resulting in a total resistance of 100 Ω. Resistance can be defined as the obstruction that electricity faces when it travels through a conductor. The greater the resistance, the less current is allowed to flow through the circuit. The following equation is used to calculate resistance: R = V / IWhere R is resistance, V is voltage, and I is current.

Resistance can also be calculated using Ohm's Law if we know the values of voltage and current. When resistors are connected in series, the total resistance of the circuit is equal to the sum of the individual resistors. This is expressed by the following equation:RT = R1 + R2 + ... + RNWhere RT is the total resistance of the circuit, and R1, R2, and RN are the individual resistors. In this case, the circuit contains two 50.0 Ω resistors connected in series.

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Solar nebula flattening is a natural consequence of collisions between particles in a spinning cloud. therefore, option B is correct.

When a solar nebula collapses under its own gravity, it begins to spin due to the conservation of angular momentum. As the cloud spins, particles within it collide and interact. These collisions cause the cloud to flatten into a disk shape rather than remaining spherical.

Angular momentum plays a crucial role in this process. The initial slight asymmetry or irregularity in the nebula's shape leads to variations in the speeds and directions of the particles' motions. As particles collide and transfer momentum, their motion tends to align along the rotational axis of the cloud, promoting the formation of a flattened disk structure.

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After the core of a sun-like star starts to fuse helium on the horizontal branch, the core becomes hotter.

This stage of stellar evolution is experienced by intermediate-mass stars, or those with masses between 0.8 and 8 M$, which includes the bulk of the galaxy's stars, including the Sun. These stars spend time on the Red Giant Branch after leaving the Main Sequence, where hydrogen burning in a shell around the central core causes their atmospheres to expand. Helium, a byproduct of the hydrogen shell-burning, is deposited in the core, raising its temperature to the point at which the triple alpha process is triggered. Three helium nuclei, often known as "alpha particles," combine during this process to create carbon-12. If this and another helium nucleus fuse, oxygen-16 is created.

The helium flash, which marks the beginning of this helium fusion in the star core, causes the temperature to rise as the radius falls, maintaining a steady luminosity. Stars in this phase are known as Horizontal Branch stars because they travel to the left, roughly horizontally, over the Hertzsprung-Russell diagram as a result of their constant luminosity and rising temperature.

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The magnitude of the total Coulomb force (F) on each of the charges is F = (3 * k * q²) / a²

To find the magnitude of the total Coulomb force (F) on each of the charges, we need to consider the forces exerted by the other charges.

Given that there are four charges q placed at the corners of a square, the force between any two charges can be calculated using Coulomb's law:

F = (k * |q1| * |q2|) / r²

Where:

F is the force between the charges

k is the Coulomb constant (approximately 8.988 × 10^9 N·m²/C²)

|q1| and |q2| are the magnitudes of the charges

r is the distance between the charges

Since all four charges are the same (q), the forces between them will have the same magnitude. Each charge experiences the force due to the other three charges.

To calculate the total force on each charge, we need to sum up the individual forces exerted by the other three charges:

F_total = F1 + F2 + F3

Substituting the given values into Coulomb's law, we have:

F_total = [(k * q²) / a²] + [(k * q²) / a²] + [(k * q²) / a²]

Simplifying the expression:

F_total = 3 * (k * q²) / a²

Therefore, the magnitude of the total Coulomb force (F) on each of the charges is given by:

F = (3 * k * q²) / a²

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The modulus of elasticity, E, is a measure of a material's stiffness and ability to resist deformation when a force is applied. It is defined as the ratio of stress to strain within the elastic range of the material. In other words, it describes how much a material will stretch or compress under a given force.

The modulus of elasticity is important because it allows engineers to predict how materials will behave under different conditions, such as temperature changes, loading conditions, and other factors. It also helps to determine the maximum load a material can withstand before it starts to deform or break.

In detail, the modulus of elasticity is a fundamental property of a material that describes its ability to resist deformation when subjected to external forces. It is calculated by measuring the stress and strain of the material and using the equation E = σ/ε, where σ is stress and ε is strain.

The modulus of elasticity is important in many areas of engineering, such as structural design, materials science, and mechanics. It helps to ensure that structures and materials are designed and tested to withstand the loads and stresses they will be subjected to, and it provides a basis for comparing different materials and choosing the best one for a particular application.

In summary, the modulus of elasticity, E, is a material property that describes its stiffness and resistance to deformation. It is correctly determined using Hooke's Law and is crucial for predicting the mechanical behavior of materials when subjected to stress.

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From the calculation, the mass of the dummies head is 1647.44 Kg

We know that the momentum after collision is equal to the momentum before collision.

Mass of the headrest = 2005.6 kg

Initial velocity of the head rest = 4.524 m/s

Final velocity of the head rest =  4.487 m/s

Mass of the dummy = m

Initial velocity of the dummy = -1.005 m/s

Final velocity of the dummy = 9.965 m/s

Then;

(m *  -1.005) + (2005.6 * 4.524 ) = (2005.6 *   4.487) + (m * 9.965)

-1.005m + 9073.33 = 8999.13 + 9.965m

9073.33 - 8999.13  = 9.965m + 1.005m

18072.46 = 10.97m

m = 18072.46/ 10.97

m = 1647.44 Kg

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Beta radiations consist of positrons or electrons. These radiations have higher energy than alpha particles but lower energy than gamma particles. A piece of paper will not be enough to stop a beta particle. It can be stopped by a few inches of glass or thin aluminum sheets.

Thus the beta radiation requires glass to be stopped.

Tidal friction between the earth and the moon causes the earth's rotation to slow gradually and the moon to move gradually closer to the earth.

Tidal friction occurs because the gravitational pull of the moon on the earth creates a bulge in the ocean on the side facing the moon. This bulge creates a tidal force that slows down the earth's rotation over time. As the earth's rotation slows down, the moon's gravity pulls on the bulge, causing it to move slightly ahead of the earth-moon line. This forward motion of the bulge creates an additional gravitational force that pulls the moon closer to the earth.

The result of tidal friction between the earth and the moon is a gradual slowing of the earth's rotation and a gradual movement of the moon closer to the earth. This process will continue until the earth and moon become tidally locked, with the same side of the moon always facing the earth.

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Answer:

The mass of the ball is 1.360 kilograms.

Explanation:

By Work-Energy Theorem, gravitational potential energy (\(U\)), in joules, is the product of weight of the ball (\(W\)), in newtons, and height (\(h\)), in meters. Please notice that weight is the product of the mass of the ball (\(m\)) and gravitational acceleration (\(g\)), in meters per square second. Then, the formula for the mass of the ball is:

\(m = \frac{U}{g\cdot h}\) (1)

If we know that \(U = 1000\,J\), \(g = 9.807\,\frac{m}{s^{2}}\) and \(h = 75\,m\), then the mass of the ball is:

\(m = \frac{U}{g\cdot h}\)

\(m = 1.360\,kg\)

The mass of the ball is 1.360 kilograms.

Placing the electromagnetic radiation in order from the lowest energy to the highest energy :  ( 2 ) C,A,B

In the electromagnetic spectrum the electromagnetic radiation with the shorter wavelength possess a higher energy while the electromagnetic radiation with a longer wavelength possess the lower energy.

The electromagnetic radiation as listed in the question with the longest wavelength is the radio waves therefore it possess the lowest energy while the radiation with the shortest wavelength is the gamma rays therefore it possess the highest energy.

Hence we can conclude that Placing the electromagnetic radiation in order from the lowest energy to the highest energy :  ( 2 ) C,A,B

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Answer:

CODIS should be the answer

Answer:

The bulb consumes electrical energy at the rate of 500 Watts

1 Watt = 1 Joule/sec  where the joule is the unit of energy

Electric energy is often expressed in kw-hrs

This means that 1 kilowatt of power is used for 1 hour

1 kw-hr = 1000 joules/sec * 3600 sec = 3.6E6 joules of energy

Answer:

latent heat, also called the heat of vaporization

The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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A dual voltage 3-phase motor can operate at two different voltage levels, typically referred to as the low voltage (LV) and high voltage (HV) settings. To connect a dual voltage motor in the high voltage configuration, a specific wiring scheme is required. Here's a brief explanation of the connection scheme:

Start by identifying the motor's voltage rating and make sure it is set to the high voltage setting.

The motor will have multiple sets of winding terminals labeled for different voltage levels. Locate the high voltage winding terminals.

Connect the three phases of the power supply to the corresponding phases of the motor winding. This is typically done using wire connectors or terminal blocks.

Make sure to connect the correct phase to the corresponding terminal (e.g., L1 to L1, L2 to L2, L3 to L3).

Verify that the connections are secure and properly insulated to prevent any electrical hazards.

Once the motor is connected, it can be energized using the high voltage power supply.

Always refer to the motor's manufacturer instructions and follow appropriate safety precautions when making electrical connections. It is recommended to consult a professional electrician or motor technician for specific guidance on wiring a dual voltage motor.

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