Based on what you know about light and matter interactions, select all of the correct statements from the following list. a Absorption spectra have bright lines. Low-density hot gases produce emission spectra. Emission spectra have dark lines. 2 The size of an electron's orbit depends on its energy Atoms absorb energy by emisting photons. a Electrons will move to higher orbits when an atom absorbs enough energy a Hot solids emit continuous spectra.

The speed of wave propagation is found to be 0.875 m/s.

For the stated question:

Amplitude a = 1.35 m

Wavelength λ = 6.3 m

Time period T = 7.2 s

Frequency υ.

From the relation of time- period and frequency:

υ = 1/T

υ = 1/7.2

υ = 0.138 Hz

Speed of the wave v;

speed = wavelength * frequency

v = λ*υ

v = 6.3 * 0.138

v = 0.875 m/s

Thus, the speed of the propagation of the wave is found to be 0.875 m/s.

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Gravitational attraction is the driving force for stellar fusion. So option a. is the correct answer.

Massive clouds were created when gas whirls of both helium and hydrogen cooled. The stuff was attracted together by the gravitational attraction in the middle, and ultimately, a few of the nuclei formed. The heat as well as the light of stars were elicited as a consequence of this. Stellar nucleosynthesis is the method by which elements are produced within stars by integrating the protons and neutrons together from the nuclei of lighter elements. All of the atoms in the universe started as hydrogen. Fusion inside stars transforms hydrogen into helium, heat, and radiation. Heavier elements are produced in distinct kinds of stars as they die or explode.

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A wave that is made up of electric and magnetic field is called an electromagnetic wave. They are produced by oscillations if both the fields.

An electromagnetic wave is produced when an electrical field come in contact with a magnetic field. An electric wave is produced by a charged particle. When a charged particle moves, magnetic waves are formed. So when a charged particle moves an electromagnetic field is formed. An electromagnetic wave is simply electrical and magnetic field moving with the speed of light.

The oscillation of electric field and magnetic field is perpendicular to the direction of the wave. Electromagnetic spectrum is the spectrum of waves arranged in order of increasing wavelength.

Examples are Gamma rays, X-rays, UV, Visible light, Infra red and radio waves.

So the wave that is made up of both electrical and magnetic fields are Electromagnetic waves.

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There is a force exerted on your hand by the apple when the apple is in contact with your hand and you are holding it up against the force of gravity.

When you hold an apple in your hand, the apple is pressing against your hand with a force equal and opposite to the force your hand is applying on the apple. This force is due to the interaction between the atoms and molecules of your hand and the apple, which is known as the normal force.

As long as the apple remains in contact with your hand, there is a normal force acting on the apple and your hand, which prevents the apple from falling due to the force of gravity. Therefore, the force exerted on your hand by the apple is present when the apple is in contact with your hand and you are holding it up against the force of gravity.

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A) Circuit A is an example of a circuit in which the ammeter accurately records the current flowing through the headlamp.

B) In Circuit A, the ammeter's current would be 6 A because it is wired in series with the headlight and has no impedance.

C) In Circuit B, 5.9 A of current would be passing through the ammeter.

Electrical equipment used to detect electrical current is called an ammeter. It measures the current immediately and is connected in series with the circuit. The ammeter is a particular kind of galvanometer, a tool used to identify and measure tiny electric currents. An electromagnet is used to measure the intensity of the magnetic field created by the ammeter around the conductor that is carrying the current.

Current flowing through the conductor immediately relates to the field's strength. Both straight and alternating currents can be measured using the ammeter. It is typically connected in series with the circuit and has a minimal resistance to make sure that all of the current passes through it. The ammeter is a crucial tool in the study of electricity because it can also detect extremely small currents.

Circuit A measures the current in the headlight.

For Circuit A, as the ammeter has no resistance and is connected in series with the headlight.

For Circuit B, the current flowing through the ammeter would be 6 A - 0.1 A = 5.9 A.

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When you remove the lid from a food container that has been left in a freezer for several months, the cold air inside the container causes the moisture inside the container to freeze onto the underside of the lid.

Food container that has been left in a freezer for several months we  discover a large collection of ice crystals on the underside of the lid this is due to the formation of a layer of ice crystals as the water vapor in the container condenses and freezes onto the cold surface of the lid. This process is known as sublimation and is why you find a layer of ice crystals on the underside of the lid.

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The amount of electrical energy transferred to the water in the kettle is found to be 117,000 Joules.

Electrical energy E.

Input Power P = 1.50 kW = 1500 W.

Time t =  2 minutes = 120 seconds.

Efficiency = 65%.

E = P*T

E = 1500*120

E = 180,000 Joules.

Energy transferred = 0.65*180,000

Energy transferred = 117,000 Joules.

Thus, the amount of energy transferred to the water in the kettle is found to be 117,000 Joules.

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A physics formula sheet is a document that lists the most important equations and formulas used in physics.

It is a useful reference for students and professionals who need to quickly access formulas for various physics problems. The specific content of a physics formula sheet may vary depending on the level and type of physics being studied.

Some common topics covered in a physics formula sheet include:

Mechanics: formulas for motion, forces, work, energy, and momentum

Waves and Optics: formulas for wave properties, optics, and sound

Thermodynamics: formulas for heat, temperature, and energy

Electricity and Magnetism: formulas for electric fields, magnetic fields, and circuits

Modern Physics: formulas for relativity, quantum mechanics, and nuclear physics

It's important to note that a physics formula sheet is not a substitute for understanding the concepts and principles behind the formulas. It's always a good practice to derive and double-check the formulas rather than just memorizing them.

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To convert MPa (megapascals) to kPa (kilopascals), you can multiply the value in MPa by 1000.

The pascal (symbol: Pa) is the SI unit of pressure, defined as one newton per square meter. It is named after Blaise Pascal, the French mathematician, physicist, and philosopher who contributed to the development of the modern theory of hydrodynamics.

One pascal is equivalent to one newton (N) of force per square meter (m²) of area:

1 Pa = 1 N/m²

Pressure can be defined as the force applied per unit area, and the pascal provides a convenient way to measure pressure in a wide range of applications. For example, the pressure of the atmosphere at sea level is approximately 101,325 Pa, or 101.3 kilopascals (kPa).

For example, if you want to convert 2 MPa to kPa:

2 MPa * 1000 = 2000 kPa

Therefore, 2 MPa is equal to 2000 kPa.

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It would cost approximately 2 cents to operate the 120 V reading lamp with a current of 2.4 A for an hour.

To calculate the cost of operating the light for an hour, we first need to determine the power consumption of the light bulb in kilowatts.

Power = Voltage * Current

P = 120 V x 2.4 A

P = 288 watts or 0.288 kilowatts

Now, we can calculate the cost of operating the light for an hour.

Energy consumed = Power x time

Energy consumed = 0.288 kW x 1 hour

Energy consumed = 0.288 kWh

Cost of operating the light for an hour = Energy consumed x Cost per kilowatt-hour

Cost of operating the light for an hour = 0.288 kWh x $0.075/kWh

Cost of operating the light for an hour = $0.0216 or approximately 2 cents

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Mass is the quantity that determines how hard it is change an object's motion or velocity.

Velocity is a vector quantity, i.e., it has both magnitude and direction. Velocity is the rate at which an object moves and is expressed in terms of m/s. The change in velocity of an object over a specific period of time is called the acceleration of that object. To determine how hard it is to change the object's motion or velocity, you need to be familiar with a quantity called its mass.

According to Newton's second law of motion, the force applied on an object to move it can be illustrated by the formula:

F = m*a, where F is the force, m is the mass, and a is the acceleration of the object. Thus, we can say that mass determines how hard it is to change the motion or velocity of the object. If it is a lighter object, it can be accelerated easily with a less force applied, while a heavier object would require more efforts and hence more force would be applied to change its state.

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The quotation highlights the colonists' fear and uncertainty about their new environment. The phrase "the Martian air might draw his soul from him" suggests that the atmosphere of Mars is so inhospitable that it could kill the colonists.

The second quotation highlights the colonists' isolation and the fragility of their situation on Mars.

"The wind blew, whining. At any moment the Martian air might draw his soul from him, as marrow comes from a white bone." The story takes place on Mars, where a group of human colonists have settled after leaving a war-torn Earth. The comparison to "marrow coming from a white bone" is a vivid metaphor that conveys the idea of something being drawn out of a person with great force.

"A radio flash just came. Atom bombs hit New York! All the space rockets blown up. No more rockets to Mars, ever!" The colonists on Mars receive this radio message, which tells them that a catastrophic event has occurred on Earth. The news that atom bombs have hit New York and that all the space rockets have been destroyed is a devastating blow to the colonists, who had been hoping to receive supplies and reinforcements from Earth. It also suggests that their dreams of building a new civilization on the red planet may be dashed by events beyond their control.

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A) The box slides for a distance of 10.23 meters before stopping.

B) The coefficient of friction at the stopping point is 0.432.

C) If the coefficient of friction were constant at 0.1, the box would slide for a distance of 10.84 meters.

A) The force of friction acting on the box is given by:

f = μmg,

where μ is the coefficient of friction, m is the mass of the box, and g is the acceleration due to gravity. The coefficient of friction varies linearly with distance past point P, and can be expressed as:

μ(x) = 0.1 + 0.04(x - 2),

where x is the distance from point P in meters.

The work done by the force of friction over a small distance dx is:

dW = f dx = (0.1 + 0.04(x - 2))mg dx.

The total work done by the force of friction from point P to the stopping point is the integral of dW over this distance range, which is given by:

W = ∫(0 to D) dW = ∫(0 to D) (0.1 + 0.04(x - 2))mg dx = (0.1mgD + 0.02mgD^2).

Using the work-energy theorem, we can equate the work done by the force of friction to the change in kinetic energy of the box:

W = ΔK = (1/2)mvf^2,

where vf is the final velocity of the box (zero, since it stops).

Solving for the distance D, we get:

D = vf^2 / 2(0.1mg + 0.02mgD) = (vf^2/2mg) / (0.1 + 0.02D).

Substituting the given values, we get:

D = (4.5^2 / 2*9.81) / (0.1 + 0.02D) = 10.23 m.

Therefore, the box slides for a distance of 10.23 meters before stopping.

B) To find the coefficient of friction at the stopping point, we can use the expression for μ(x) and substitute D = 10.23 m:

μ(D) = 0.1 + 0.04(D - 2) = 0.1 + 0.04(10.23 - 2) = 0.432.

Therefore, the coefficient of friction at the stopping point is 0.432.

C) If the coefficient of friction were constant at 0.1 throughout the rough section, the work done by the force of friction would simply be:

W = fD = 0.1mgD.

Using the work-energy theorem as before, we can equate this work to the change in kinetic energy of the box:

W = ΔK = (1/2)mvf^2.

Solving for D, we get:

D = vf^2 / 20.1g = (4.5^2 / 29.81×0.1) = 10.84 m.

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Subtract this magnitude of a smaller force from of the magnitude of bigger force to determine the resultant force. The smaller force and the resultant force both have the same direction.

The combined impact of two forces, F and F, acting on a body in a single place is equal to the action of one force, known as the resultant force. The following figure shows two different ways to display the vector equivalence R = F + F.

The sum of the individual forces acting on a body as a result of two forces acting in similar directions is called the resultant, and the point of application of the resultant divides the line connecting the pts of application of the individual forces internally inside the inverse ratio of a forces.

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1 calorie is defined as the amount of heat energy required to raise the temperature of 1 gram of water by 1° celcius.

Calorie is defined as a unit to measure the amount of energy of any substance. One calorie is defined as the amount of energy required to raise the temperature of one gram of water by 1ﾟC at 1 atmospheric pressure. The symbol used to represent calorie is cal.

Also one calorie can be defined in the terms of joule. 1 calorie is considered to be equivalant to 4.2 joules.

There are two different types of calories. First one is a small calorie (cal) and the 2nd 1 is large calorie (kcal). The small calorie is used to measure general amount of heat of any substance. Where has the large calorie is used in nutrition to measure the amount of energy content of the food subustances.

Therefore, 1 calorie can be defind as the heat required to raise the temperature of 1 gram of water by 1ﾟC and is equivalant to 4.2 joules.

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The first situation that the bird is giving force to its wings to fly , it is related to the first law. The second one the coffee cup stay on rest until any force acts on it is related to the first law.

Newton's first law of motion states, every objects tends to stay in its current  state until an external force acts on it. The second law states that, the force is the product of mass and acceleration. Thus, greater is the mass greater force is needed to accelerate an object.

Third law of motion states that, for every action there is an equal and opposite reaction.

The sailor when pushing the boat, the boat is exerting a force in turn and the man can slide to the land and boat moves away. This is third law of motion.

As the force by the wind increases, its acceleration increases . This is second law. The team with greater mass in tug of war game will  have greater force that is just the second law.

The skater board tends to move again even after the hitting, its is first law of Newton.

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After solving, a) The weight of it oil drop is 2.42 x 10⁻¹² N, b) the electric field strength needed to balance its weight is -1.51 x 10⁷ N/C

The weight of the oil drop can be calculated using the formula:

weight = mass x gravity

where mass = density x volume and gravity = 9.81 m/s².

The volume of the oil drop can be calculated using the formula for the volume of a sphere:

volume = (4/3) x pi x radius³

Substituting the given values:

volume = (4/3) x pi x (0.95 x 10⁻⁶ m)³ = 2.73 x 10⁻¹⁶ m³

mass = density x volume = 905 kg/m³ x 2.73 x 10⁻¹⁶ m³ = 2.47 x 10⁻¹³ kg

weight = mass x gravity = 2.47 x 10⁻¹³ kg x 9.81 m/s² = 2.42 x 10⁻¹² N

To balance the weight of the oil drop, the electric force on the excess electron must be equal and opposite to the weight of the drop. The electric force on the excess electron can be calculated using the formula:

electric force = charge x electric field

where charge is the charge on the excess electron and electric field is the strength of the electric field.

The charge on an electron is -1.602 x 10⁻¹⁹ C.

Substituting the given values and equating the electric force to the weight of the drop:

charge x electric field = weight

-1.602 x 10⁻¹⁹ C x electric field = 2.42 x 10⁻¹² N

Solving for electric field:

electric field = (2.42 x 10⁻¹² N) / (-1.602 x 10⁻¹⁹ C) = -1.51 x 10⁷ N/C

The negative sign indicates that the electric field is directed upward, opposite to the direction of gravity, in order to balance the weight of the drop.

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To convert Newton meters (Nm) to foot pounds (ft-lb), you can use the following conversion factor:1 Nm = 0.737562149 ft-lb

A newton meter (Nm) is a unit of torque or moment of force in the International System of Units (SI). It is defined as the amount of torque produced by a force of one newton applied perpendicularly to a moment arm or lever arm of one meter.

In other words, a newton meter is the amount of force required to produce one newton of torque when applied at a distance of one meter from the axis of rotation. It is commonly used in engineering, physics, and other fields to measure torque or rotational force, such as the force required to tighten a bolt or turn a crank.

The newton meter is also equivalent to a joule (J), which is the SI unit of energy, since torque can be thought of as a force acting over a distance. This means that one newton meter of torque is equivalent to one joule of energy.

So, to convert a certain number of Newton meters to foot pounds, you just need to multiply the number of Newton meters by the conversion factor.

For example, let's say you have 50 Newton meters and you want to convert it to foot pounds. Using the conversion factor, you would multiply 50 Nm by 0.737562149 to get:

50 Nm x 0.737562149 = 36.88160745 ft-lb

Therefore, 50 Newton meters is equivalent to approximately 36.88 foot pounds.

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Answer: b

Explanation: no cule

The given statement, Non-volatile memory is a type of memory that retains its contents even when the power is turned off is true because non-volatile memory devices are designed to store data in a way that is not dependent on the presence of an external power source.

Non-volatile memory is a type of computer memory that can retain its contents even when the power is turned off. This is different from volatile memory, which loses its contents when the power is turned off.

Examples of non-volatile memory include read-only memory (ROM), flash memory, and magnetic storage devices like hard drives and solid-state drives. These types of memory are used to store data and programs that need to be preserved even when the computer is turned off or loses power.

Therefore, the statement that non-volatile memory is temporary and loses its contents when the power is turned off is true. Non-volatile memory is designed to retain its contents even when the power is turned off, making it an essential component of computer systems.

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To find PV, FV, or r, apply the one period Although on lump sum formula. FV = Fv (1+r) FV-PV-PV/1+r PV-FV/1+r

Describe formula.

The meaning of a formula. (Page 1 of 2) 1a: a predetermined set of phrases used in rituals or ceremonies. b: a formalized assertion meant to convey a fundamental fact or principle, especially as a starting point for discussion or action. Recipe 2a(1) The manufacturer of the product won't divulge the formula's secret ingredients. prescription (number 2)

The % formula is what.

To determine the quantity or percentage of an item in terms of 100, use the percentage formula. Per cent simply means one in a hundred. With the percentage formula, a number between 0 and 1 can be expressed. A number that is expressed as a percentage of 100 is what it is. It is mostly used to evaluate and determine ratios and is represented by the symbol %.

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Rocks with a silica content of around 70% and composed primarily of quartz and feldspars are at the light-colored extreme. Granitic rock refers to these rocks.

Amorphous silicon dioxide, or SiO2, is employed in microsystems as a structural or sacrificial layer in many micro - milling techniques, as a dielectric in capacitors and transistors, as an insulator to isolate various electronic parts, and in other applications.

In order to alter the rheological behaviour of cement systems, increase the reactivity of supplemental cementitious materials, and increase the strength and durability, SiO2 nanoparticles were utilised.

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An object that weighs 100 kg on Earth would have weight of about b) 16 kg on moon.

The weight of an object on the moon is different from its weight on Earth due to the difference in the gravitational force between the two objects. The gravitational force on the moon is much weaker than on Earth because the moon has less mass and a smaller radius.

Gravitational force on moon is 1/6th of gravitational force on Earth. Therefore, an object that weighs 100 kg on Earth would weigh about 16.6 kg (100 kg divided by 6) on the moon.

Therefore, the answer is (b) 16kg. It is important to note that the mass of the object remains the same on both Earth and the moon, as mass is a fundamental property of an object that does not change with location. However, weight is a force that is dependent on the gravitational force acting on the object, so it varies with location.

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Yes, defining the charge on an electron to be positive have any effect on coulomb’s law.

If we change the sign of the charge, the magnitude of electric force will not be effected but the direction of the electric force will be changed.

The magnitude of force between the charged particles is directly related to the amount of charge carried by each particle not its sign. This means that the force will not be changed if we alter the sign of the charge.

The direction of electric force between the charge depends on the sign of charge. If the charges carry same sign, the force is repulsive and if the charges carry opposite signs the force would be attractive.

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95°F is equivalent to 35°C temperature. Using Formula: °C = (°F - 32) x 5/9.

A measure of something's heat or coldness is its temperature. The most often used temperature scales globally are Celsius (°C) and Fahrenheit (°F), while there are other scales as well.

To convert Fahrenheit to Celsius, you need to subtract 32 from the Fahrenheit temperature and then multiply the result by 5/9. This formula works because the freezing point of water is 32°F and 0°C, and the boiling point of water is 212°F and 100°C. So, a change of 1 degree Fahrenheit is equivalent to a change of 5/9 degree Celsius.

To convert 95 degrees Fahrenheit (°F) to Celsius (°C), you can use the formula:

°C = (°F - 32) x 5/9

Substituting 95 for °F in the formula, we get:

°C = (95 - 32) x 5/9 = 35

Therefore, 95°F is equivalent to 35°C.

To remember this formula, you can use the mnemonic: "First subtract 32, then multiply by 5/9".

Alternatively, you can use online temperature converters or smartphone apps to quickly and accurately convert between different temperature scales.

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The largest deflection from the isoelectric line in the ECG is found in the QRS complex.

The correct option is D.

An ECG (electrocardiogram) is a medical test that records the electrical activity of the heart. It is a non-invasive procedure that involves attaching electrodes to the skin of the chest, arms, and legs, which detects the electrical signals generated by the heart as it beats. These signals are amplified and recorded, producing a visual representation of the heart's electrical activity over time, known as an ECG waveform.

The QRS complex is the largest deflection from the isoelectric line in the ECG. It represents the depolarization of the ventricles and is typically a sharp, narrow peak.

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In Fahrenheit, 35.6 degrees Celsius is equivalent to 128.08 degrees.

Use the formula below for the convert 35.6 degrees Celsius to Fahrenheit:

°F = (°C x 1.8) + 32

The process of translating a temperature from one scale to another is referred to as temperature conversion. Temperature conversions between the several regularly used temperature scales, including Celsius, Fahrenheit, and Kelvin, are frequently required.

where the temperature is expressed in degrees Fahrenheit (°F) and degrees Celsius (°C).

Plugging in 35.6 degrees Celsius yields the following results:

°F = (35.6 x 1.8) + 32 °F

=> 96.08 + 32 °F

=> 128.08

As a result, 35.6 Celsius is equivalent to 128.08 Fahrenheit.

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37 degree Celsius to Fahrenheit is 98.6°F where Fahrenheit and Celsius are related in that they are both units of temperature measurement.

The formula for converting Celsius (°C) to Fahrenheit (°F) is :

[tex]F = C * 9/5 + 32.[/tex]

To convert 37°C to Fahrenheit (°F), use the formula :

[tex]F = 37 * 9/5 + 32.[/tex]

F = 66.6 + 32

F = 98.6°F

The formula for converting a temperature from Fahrenheit to Celsius is

[tex](F - 32) * 5/9[/tex]. This formula can be used to find the Celsius equivalent of any temperature given in Fahrenheit. This conversion formula takes into account the difference between the two temperature scales, with Fahrenheit being the higher temperature scale and Celsius being the lower temperature scale.

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The woman will be moving at a speed of 5.2 m/s after the push.

Speed is the rate at which an object or person moves from one place to another. It is measured in distance over time, such as meters per second, miles per hour, or kilometers per hour. Speed is a scalar quantity, meaning it has magnitude but no direction.

The man and woman are moving with the same speed before the push, so they must be moving with the same speed after the push. This is because momentum must be conserved. Momentum is equal to the mass times the velocity, so the momentum of the two-stater system before the push is equal to the momentum of the system after the push. We can calculate the momentum before the push by multiplying the total mass (85kg + 66kg = 151 kg) and the velocity (2.3 m/s), and find it to be 344.3 kg*m/s. We can then calculate the velocity of the woman after the push by dividing the momentum by the mass, and find it to be 344.3/66 = 5.2 m/s. Therefore, the woman will be moving at a speed of 5.2 m/s after the push.

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You'll move more quickly and halt farther away thanks to gravity. To slow down to a safe speed and keep control of your car, you might need to downshift or gently apply the breaks.

Gravity aids you in stopping attempts and shortens the stopping distance when you are traveling uphill. When you are descending, gravity also works against you and lengthens your stopping distance. The next factor that can affect your braking distance is the friction between the road and your tires. The amount of time it takes to stop a moving object is related to the square of the starting speed of the vehicle and relies on how quickly it was moving before the brakes were applied. Hence, even little speed increases result in noticeably larger stopping distances. The distance covered while using the brakes is the braking distance. Speed and drag are two variables that influence it.

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