An object’s velocity v as a function of time t is given in the graph above. Which of the following statements is true about the motion of the object?

The object is not moving from t = 4 s to t = 10 s.
The object is not moving from , t , = 4 s to , t , = 10 s.

The object’s initial and final positions are the same.
The object’s initial and final positions are the same.

The object is slowing down from t = 14 s to t = 16 s.
The object is slowing down from , t , = 14 s to , t , = 16 s.

A - The object is not moving from t = 4 s to t = 10 s.
B - The object’s initial and final positions are the same.
C - The object is slowing down from t = 14 s to t = 16 s.
D - The average acceleration of the object from t = 0 s to t = 4 s is different from the acceleration from t = 34 s to t = 36 s.

and how is it solved

In general, a mixture can be separated into its constituents using just physical changes to do the task.

A mixture can be defined as a combination of two (2) or more substances which are present in varied proportion (unfixed ratios). Also, a mixture can be visibly seen with our na-ked eyes and separated by physical means.

A separation technique simply refers to a technique that is used to separate two or more mixture and solution of chemical substances into distinct products or constituents such as solutes, chemical compounds, or elements.

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Complete Question:

In general, a mixture can be separated into its _____ using just physical changes to do the task.

In general, a mixture can be separated into its original components using just physical changes to do the task.

A mixture is a group of materials that can be separated by applying suitable physical-chemical procedures such as for example evaporation procedure, distillation methods, and chromatography methodology. Conversely, a pure component cannot be separated.

Therefore, with this data, we can see that the mixtures can be separated into one or more components, while a pure material contains only one type of substance that cannot be separated.

Complete question:

Fill in the blank. In general, a mixture can be separated into its____________using just physical changes to do the task

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a) v = 9.8 m/s is his velocity just before his feet strike the ground.

b) When he slows down, his legs apply an average force of 3430 N to his torso.

Therefore, deceleration is defined as a reduction in speed as the body moves away from the beginning location. The opposite of acceleration is deceleration.

Given parameters;

Height of the tower , h = 5.0m

Distance of deceleration, d = 0.70m

Mass of the tensor, m = 50 kg

Final speed of the person calculated as:

1/2mv² = mgh

v² = 2gh

v = [tex]\sqrt{2gh}[/tex]

v = [tex]\sqrt{2*9.8*5}[/tex]

v = 9.8 m/s.

The torso's deceleration over the specified distance is

v² = u²+2as

a = v²-u²/2s

a = 0-  9.8²/2*0.7

a = 68.6m/s²

The average amount of force his legs apply to his body as he slows down is:

F = ma

F = 50× 68.6

F = 3430 N.

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The friction between a vehicle's brakes and the wheel is worked on when a force is applied to the brakes. The vehicle's kinetic energy is decreased, which slows it down and raises the temperature of the brakes.

The electric motor starts functioning as a generator as soon as your foot leaves the accelerator pedal. It begins to recharge the battery by utilizing the kinetic energy that is released while the automobile is going ahead. Depending on the setting chosen, this results in a stronger than typical slowdown of the vehicle.

Braking has to adhere to the energy conservation concept, just like any other system. Energy can only be changed from one form to another; it cannot be generated or destroyed.

Chemical energy (fuel, air, and spark plugs) is converted inside the engine to mechanical energy known as kinetic energy.

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Answer: .28 meters

Explanation:

Isaac Newton was significant to the study of mathematics, physics, and optics. Hence, all of the choices are correct; option D

Sunlight is   mixture of all visible light; option A

Isaac Newton believed that light had properties of both particles and waves; False

Light waves are made of photons; option B

The type of electromagnetic waves that causes the most damage to living things is gamma rays; option C

An object that produces light because it has been heated is incandescent; option B

The most transparent object is bottled water; option B

The standard unit of brightness is called the candela; True

The direction of a reflected ray will always match its; None of the choices are correct.

Plane mirrors always follow the law of reflection; True

All light rays parallel to the optical axis of a concave mirror are reflected through the focal point; option B

Headlights on cars are made from convex mirrors; False

Concave mirrors are used in reflecting telescopes; True

A mirage is caused by the bending of light rays as they pass through air layers of different densities; True

Light refracts because it changes speed as it moves between media of different densities; option B

Lenses reflect light; option A

Images are formed on the retina of the eye; option C

The vitreous humor is the part of the eye that light strikes first; True

Lenses in the human eye do not change shape; False

Ultraviolet radiation is not helpful to humans, it is only harmful; False

Refraction of light is a phenomenon that occurs when light travels from a medium of less optical density to a medium of greater optical density or vice versa

The lens in the eye functions to refract light. Lenses can also reflect light.

Sunlight can be refracted or reflected. It contains light of all colors and is a form of electromagnetic radiation.

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C2H2O+4O2 → 3CO2 + 3H2O shows a combustion reaction.

Combustion reaction is chemical reaction of substances including oxygen and accompanied by the generation of heat and light. Lighted match is an example of a combustion reaction. Combustion reaction takes place in the presence of oxygen as a reactant and products given are carbon dioxide, water and heat.

Combustion is an exothermic reaction which means that energy is released. Heat and light are released in a combustion reaction. During exothermic reactions, bonds are broken, which allows the energy stored in the bonds to be released and perform work. Exothermic reactions are chemical reactions that produce heat in the product. We say that the heat flow q is negative when heat flows from the system to the surrounding. Thereby, exothermic reactions have negative ΔH of the reaction.

Types of combustion are:

Rapid Combustion, Spontaneous Combustion and Explosive Combustion.

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Wind is the most frequent cause of waves. The friction between the wind and the surface of the water produces wind-driven waves, also known as surface waves. A wave crest is produced when wind continuously disturbs the water's surface in an ocean or lake.

A wave exists an energetic disturbance in a medium that doesn't include any net particle motion. Elastic deformation, a change in pressure, an electric or magnetic intensity, an electric potential, or a change in temperature are a few examples.

Wind is the most frequent cause of waves. The friction between the wind and the surface of the water produces wind-driven waves, also known as surface waves. A wave crest is produced when wind continuously disturbs the water's surface in an ocean or lake.

Waves are oscillations or vibrations that revolve around a resting point. As an illustration, sound waves force air molecules to oscillate. Water molecules vibrate up and down due to ripples.

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A noise of 1 decibel is subaudible. Option D.

When it comes to human hearing noise below 70 dB is considered safe. 1 decibel is below this limit so this level is considered safe for human hearing. Noise above 85 dB is considered potentially dangerous with prolonged exposure. The human hearing threshold is approximately 0 decibels.

Above this threshold sounds with higher sound pressure levels are perceived as louder. To make the noise twice as audible the noise must be increased by 10 dB. For example, 10 violins can only be heard twice as loud as 1 violin. The risk of hearing loss from noise increases with sound intensity, not loudness. Almost all firearms produce noise in excess of 140 dB small. 22 caliber rifles can make about 140 dB of noise while large caliber rifles and pistols can make more than 175 dB of noise.

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Magnitude of their combined momentum will be 1.41 kgm/s

let the first ball moving along positive x direction,

hence its momentum will be :

P1 vector = 1x^ kg m/s

And the second ball is moving along positive y direction,

hence its momentum will be :

P2 vector = 1y^ kg m/s

If P vector will be the first momentum of the system after collision then,

P vector = P1  vector + P2 vector

P vector = 1x^ + 1j^ kg m/s

Hence , combined momentum of is

= ( root under  (1 ) ^2 + (1) ^2

= 1.41 kg m/s

In Newtonian mechanics, linear momentum, translational momentum, or certainly momentum is the made from the mass and pace of an item. It's miles a vector amount, owning a significance and a path. If m is an object's mass and v is its velocity, then the item's momentum p is: mathbf{p} = m mathbf{v}.

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Answer:

"the proton is decelerating" because electric field is directed away from a positive charge and a proton would tend to move away from a positive charge.

Since a proton would typically move away from the positive charge and an electric field is pointed away from such a positive charge, "the proton is decelerating."

When a charge is available in any form, a point in space has an electric field that is a physical characteristic of electricity. The value of E, often known as electric field strength, applied electric intensity, or just the electric field, is a mathematical constant that describes the strength and direction of an electric field.

All that is required to predict what will happen to electrostatic force close to a specific spot is information of the magnitude of the electromagnetic current at that location, not any precise information of what generated the field.

In instead of thinking of the electric force as the result of two electric charges coming into contact directly, one charge is thought of as the source of an electromagnetic current that radiates outward into the surroundings.

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Answer: [Ans. 196 N] Was this answer helpful?

All electrons have energy stored in them which is potential energy.

Pressure increases the electron's kinetic energy causing it to move faster and eventually jump to a wider orbit. Each electron then stores energy, which becomes potential energy. Kinetic energy can be converted into other forms of energy and vice versa. For example, kinetic energy is converted into electrical energy by a generator or into thermal energy by a car's brakes.

Energy is not destroyed or lost in the transition from potential energy to kinetic energy. It just converts from one type of energy to another type of energy. This is known as the law of conservation of energy. When a person rides a bicycle to the top of a hill, the kinetic energy of movement is converted into potential energy and stored in the bicycle at the top of the hill. The potential energy stored in the bike at the top of the hill can be used to roll the bike down the hill.

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Braking distance - It will take approximately 133 feet for a vehicle to stop on a dry surface when driving at a speed of 60 mph.

What is braking distance?

When you apply the brakes, your car will move this far before coming to a complete stop. As you increase your speed, the braking distance for the same car in the same circumstances will grow. The Highway Code provides typical braking distances for various speeds because of this. The published road brake pedal performance tests for almost all current production vehicles show braking distances from 60 mph that really are typically 120 to 140 feet, just under half of the anticipated safety distances.

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The cannonball lands 12.4 km from the cannon if the cannonball is fired with a velocity of 551 m/s in the cannon is aimed 12° above the ground.

R = u² sin 2θ / g

R = Horizontal range

u = Initial velocity

θ = Angle made with ground

g = Acceleration due to gravity

u = 551 m / s

θ = 12°

g = 9.8 m / s²

R = 551² sin 2 ( 12° ) / 9.8

R = 303601 * 0.4 / 9.8

R = 12392 m

R = 12.4 km

The horizontal range of a projectile is the horizontal distance travelled by the projectile from the point from which it was launched. It is denoted by R.

Therefore, the cannonball lands 12.4 km from the cannon

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A photon of electromagnetic wave with  energy of 4.17 x 10 -19 Joules will have frequency of 6.29 x 10¹⁴ Hz and wavelength of 4.77 x 10⁻⁷ m.

The energy carried by a photon is given by:

E = h.f

Where:

h = Planck's constant = 6.626 × 10⁻³⁴ J. s

Substitute E = 4.17 x 10⁻¹⁹ Joules into the formula:

4.17 x 10⁻¹⁹ = 6.626 × 10⁻³⁴ . f

f =  4.17 x 10⁻¹⁹ /  6.626 × 10⁻³⁴  = 6.29 x 10¹⁴ Hz

The wavelength is:

λ = c/f

where

c = speed of light = 3 x 10⁸ m/s

Hence,

λ =3 x 10⁸ / 6.29 x 10¹⁴ = 4.77 x 10⁻⁷ m

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An object with a mass of 1298 kg is accelerating at a rate of 17 m/s² when a net force is applied to it is 22066 Newton.

A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Given that in the question an object with a mass of 1298 kg is accelerating at a rate of 17 m/s² when a net force is applied to it. The magnitude of the net force that is acting on the object is,

F = ma

F = 1298.17

F =  22066 Newton

The magnitude of the net force that is acting on the object 22066 N.

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The air at ground level rises to form convection currents.

It creates lift upon collision with the glider's wing allowing it to stay in the air or even rise to higher altitudes. Thermals occur when the sun heats the ground and the ground warms the air above. As small plumes of warm air rise, they gather together to form thermals, the perfect place for gliders to fly and stay airborne. So the density of nearby air decreases.

This less dense air rises and helps birds fly farther. Dense air replaces this space. This movement is known as convective air currents. We know that draft is the movement of air uplifted by temperature differences between rising strata. Therefore, when a bird flies over this updraft column, this convective air current allows the bird to reach higher altitudes without additional effort.

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Answer:

See below

Explanation:

Each of the given numbers have 4 significant digits.....so the answer can only have a maximum of 4 S.D.

7-273-12.37 = - 5.097

The static friction coefficient is higher than the kinetic friction coefficient.

What is static friction?

Friction is the obstruction or resistance that prevents one solid object from rolling or sliding over another. F indicates this. Any solid and liquid layer motion is opposed by a force. When two materials slide over one another, this force is created. There is friction all around us. For instance, when we walk, the ground is in contact with our feet. When we walk, one foot advances while the other moves backward, applying pressure to the ground. When this force is applied to the ground, the ground applies an equal and opposing force to our feet. One of the laws of motion is being followed in this situation.

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The magnitude of the resultant force on the mass at this instant is 10.43 N.

The magnitude of the resultant force is sum of the all the forces acting on the mass.

The magnitude of the resultant force is obtained from the vertical component of the forces and horizontal component of the forces.

Sum of the vertical component of the forces is calculated as follows;

Wy = W sin (90)

where;

Wy = (0.3 kg x 9.8 m/s²) sin (90)

Wy = 2.94 N

Ty = T sin (50)

where;

Ty = 8 sin (50)

Ty = 6.13 N

∑Y = Wy + Ty

∑Y = 2.94 N  +   6.13 N

∑Y = 9.07 N

Sum of the horizontal component of the forces is calculated as follows;

Tx = T cos (50)

Tx = 8 x cos (50)

Tx = 5.14 N

Wx = W cos (90) = 0

The resultant force is calculated as follows;

F = √ (∑Y²  + ∑X²)

F = √ (9.07²  + 5.14²)

F = 10.43 N

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The refrigeration liquid is vaporized to create a chilling effect within a refrigerator.

In order for refrigerators to function, the refrigerant that circulates inside of them must transform from a liquid into a gas. Evaporation is the process that causes this cooling and results in the desired outcome.

Any surface that has a liquid on it that is evaporating will be colder than the surroundings. The cooling effect occurs when gases in an air conditioner are liquefied to the point where they will quickly evaporate at room temperature, making the environment cooler.

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A water-filled jug's bottom pressure is independent of the water's surface area.

The surface area of a 3D object is the total area that all of its faces occupy. In order to calculate how much paint is required to paint a cube, for example, we must first measure the cube's surface area. stated exclusively in square units.

The total area that an object's surfaces occupy is referred to as its surface area. The formulas make it straightforward to calculate the surface areas of various 3D geometric shapes.

Although they all try to determine the total area occupied by all of the objects' faces, the surface area formulas for each geometric shape differ from one another.

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If two wind-driven waves moving from different directions came together in such a way that the wave crests overlap to form a single crest, it would become larger than that of the two original waves.

The interaction of waves with other waves is called wave interference. Wave interference may occur when two waves that are traveling in opposite directions meet. If two waves are shifted by exactly half a wavelength when they merge, then the crest of one wave will match up perfectly with the trough of the other wave, and they will cancel each other out.

Wave interference:

When two waves come close to one another their effects and together. If the crests, or highest parts of the waves, line up perfectly, then the crest of the combined wave will be the sum of the heights of the two original crests.

Therefore when the two wave crests overlap to form a single crest then it would become larger than the two original waves.

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From low to high frequency, a wave's wavelength increases while its frequency decreases: 0.8 km, 5 m, 7 cm, 3 m, 460 nm, and 0.02 nm. The characteristic of a wave is known as its wavelength.

A wave's wavelength is the characteristic that determines how far identical locations between two succeeding waves are separated. The Greek letter lambda () is used to represent it. Thus, the wavelength is defined as the separation between one wave's crest or trough and the following wave.

The frequency of an event is its repetitions per unit of time. As a contrast to spatial frequency, it is also sometimes referred to as temporal frequency, and as a contrast to angular frequency, it is sometimes referred to as ordinary frequency.

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Because of the earth's large mass and solid structure, the skier moves but the earth does not.

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2.4 m/s is the average velocity of the car and 10.57 m/s is the average speed of the car travelling through whole motion.

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The system's overall energy is saved during an elastic collision. The system's overall energy is not conserved in an inelastic collision.

What is collision?

Collision: Collision is the interaction of two things that results in them applying a great deal of force to one another quickly. Elastic and inelastic collisions are two different types of collision that depend on energy conservation.

The total momentum of the system is conserved in both of these collisions, meaning that the total momentum before the collision and the total momentum after the collision are the same.

"In an inelastic collision of an isolated system, the final momentum is exactly the same as the initial momentum," follows.

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The magnitude of net force acting on the bovine is

An item is considered to be in uniform acceleration when it is moving in a straight path while accelerating at regular intervals of time. here we have to find what is the net force acting on the body.

initial speed(u)= 5.0 m/s

final speed (v)= 12.0m/s

distance travel(x)= 94m

mass (m)=1200kg, t=time period

according to force equation f=ma

we know that Δv=Δx/Δt

Δt=Δx/Δv= 94/7

here we have to find acceleration

a =u-v/Δt, a=49/94=0.52

by putting all the value in force equation f=ma= 1200* 0.52=625.53 N

WHAT IS ACEELERATION ?

Acceleration is the rate at which an object's velocity with respect to time changes. They are vector quantities, accelerations.

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The ball will travel a horizontal distance is 79.7 ft before before it hits the ground.

What is horizontal distance?
An object to which we provide an initial velocity is called a projectile, and gravity has an impact on it. The length of the horizontal axis is a projectile's horizontal range. In addition, it would move before returning to the original vertical position. The horizontal range then depends on the launch angle θ, the acceleration brought on by gravity, and the beginning velocity V₀. Meters are the horizontal range's unit (m).

The ball will travel a horizontal distance of 105.6*cos(36.9) = 79.7 ft before it hits the ground.

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