Two men walk away from each other in opposite directions. both travel 3.5 m each second. what is the difference between the speeds and between their velocities?

1) Length: 44 blocks

2) Relocation: 10.2 blocks to the north of the east

Since each segment travelled a certain amount of distance, the total distance is:

distance equals 18 + 10 + 16 blocks.

The total distance travelled is larger than the displacement between those two places if an item changes direction while travelling.

The displacement is only the difference between the locations of the two markers and is unrelated to the route used to get there. The entire length of the path between the two markings, however, is the distance travelled.

The distance is always greater than the object's displacement and can never be 0 or negative.

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Answer:

C. is correct.

Explanation:

Hope this helps :)

The suggestion given by Hannah is not a well-supported and widely accepted explanation. So, option A is correct.

Friction is a force that prevents two solid objects from rolling or sliding over one another. Although frictional forces, such as the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion. Automobile engines use about 20% of their output to overcome frictional forces in moving parts.

The adhesion forces between the contact zones of the surfaces, which are always microscopically uneven, appear to be the primary cause of friction between metals. Shearing these "welded" joints and the action of the tougher surface's imperfections scrubbing against the softer surface cause friction.

According to the question, Hannah is driving the car up a hill and when she is not pressing the accelerator the car slows down. The reason behind this is that there is an ascent of height that the car has to climb with its engine power and if the accelerator is not applied to it then it will start to slow down also friction is a factor that is involved in this case.

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To fill the volume of 187 u. s. fluid gallons at a rate of 1.7 g/min will take: 416215.8 min

To solve this problem the we have to do the conversion of units with the given information and the following formulas:

Where:

Information about the problem:

By converting the density unit from (kg/m³) to (g/in³)and then to (g/u.s. fluid gallon) we have:

d = 1000 kg/m³ * 1000 g/ 1 kg * 1 m³/61020 in³

d =16.380 g/in³ * 231 in³ /1 u.s. fluid gallon

d = 3783.78 g/u.s. fluid gallon

Applying the density formula and clearing the mass (m), we get:

m = d * v

m = 3783.78 g/u.s. fluid gallon * 187 u. s. fluid gallons

m = 707566.86 g

Applying the time formula we have that:

t = x/v

t = 707566.86 g / 1.7 g/min

t = 416215.8 min

It is the transformation of a value expressed in one unit of measurement into an equivalent value expressed in another unit of measurement of the same nature.

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Answer:

6m.s‐²

Explanation:

IF there is no friction or any other force acting on the objects then use the equation Fnet=m.a

Fnet=m.a

270=45(a)

a=6

results will change if there is another force acting on the box besides the pushing force

please give brainliest

Answer:

Pharmaceutics

Explanation:

Pharmaceutics are medicinal chemistry , and pharmacology became established and as the foundation sciences .

When a 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air resistance the acceleration of both rocks is: the same and equal to the gravity

When an object is dropped (in the absence of air resistance) it has a positive acceleration equal to the gravity.

Therefore, no matter in which instant of the movement both rocks are, their acceleration will always be equal to the acceleration of gravity 32.17 ft/s², and after finishing their movements the acceleration will be equal to zero (0) because they will reach the ground and will be at rest.

In physics, gravity is the force of attraction that the earth exerts on all bodies possessing mass by pulling them toward its center.

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When a ball is hit at an angle to the horizontal, the ball has two motions going for it concurrently: the first and simpler one is the constant-speed horizontal motion; the other is the vertical constant-acceleration motion. To investigate the motion of the ball, we use kinematic equations based on Newton's laws.

The mass of the box which the fisherman applies a horizontal force is 17.16 Kg

To solve this exercise, the formula and procedure to be applied are:

F = m * a

Where:

Information about the problem:

Applying the force formula and isolating the mass, we get:

F = m * a

m = F/a

m =  51.5 Kg * m/s² / 3.00 m/s2

m = 17.16 Kg

It is the physical magnitude that expresses the effort necessary to move the mass of one kilogram with an acceleration of one meter per second squared, this is expressed in units of the international system in Newton.

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At 65.7K temperature is the resistance 2 ohms.

A conductor's resistance is influenced by its temperature, and a conductor's initial resistance and temperature change are directly inversely correlated. It has been noted that a conductor's resistance increases as temperature rises.

i.e., ΔR ∝ R₀ΔT

R is the temperature coefficient of resistance and T is the temperature.

⇒ R - R₀ =R₀αΔT

⇒ R = R₀(1 + αΔT)

R0 = starting resistance in this case = 1.25

0.00375°C is the temperature coefficient.

2 = 1.25[1 + 0.00375(0-[tex]T_{f}[/tex])]

2 = 1.25 + 1.25× 0.00375(0-[tex]T_{f}[/tex])

0.75 = 0.0046875(0-[tex]T_{f}[/tex])

65.7K =   [tex]T_{f}[/tex]

Therefore, at 65.7K temperature is the resistance 2 ohms.

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Answer:

Electricity and Magnetism

To be effective, there must be must agreement aimed at preventing or reducing ozone depletion by the international government and the various international organizations.

It can be defined as the origination of the contaminant substance that poisonous or harmful to our natural environment.

The Montreal Protocol is an international agreement that was established to safeguard the earth's atmosphere by gradually banning the manufacturing and use of chemicals that damage the ozone layer (ODS).

Thus, For an agreement between the different international organizations and the international government to be effective, it must be targeted at avoiding or mitigating ozone depletion.

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Assume upward is the positive direction. Julia tosses a water balloon straight up at time t = 0.The option D of the following graphs best shows the velocity of the ball after it is thrown.

Velocity is a term defines that a particles covered distance upward positively and downward negatively in a constant time. It is a vector quantity.

According to the question, assuming upward is the positive direction. Julia tosses a water balloon straight up so there is a initial velocity in the balloon.

So the curve starts from the positive vertical axis of v-t curve.

we are using the formula; v=u+at

Now we know from discussion, there is a positive initial velocity. But There is a acting of acceleration due to gravity. That acceleration acting the on ball from the beginning. So after some time the velocity of the ball become zero and then it start to moving downwards.

Then the formula becomes,

v=u+(-a)t

Or, v=u-at

So, from the above discussion we can say that the nature of graph (d) is similar to our discussion. The option D of the following graphs best shows the velocity of the ball after it is thrown.

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The motion of projectiles shows that acceleration is constant in both directions; option B.

Projectile motion refers to the motion of projectiles in a curved path or parabola under the influence of gravity.

Projectiles are objects which are launched into the air and allowed to fall freely under the effect of the gravitational force of the earth.

For a horizontally-launched projectile with acceleration in the x-axis or x-direction equal to zero and acceleration u=in the y-axis equal to -9.8 m/s², the object is moving with a constant acceleration in both directions.

In conclusion, the motion of objects which are being launched into the air and allowed to fall freely under the effect of the gravitational force of the earth is known as projectile motion. Projectiles move with constant acceleration in both the x and y directions.

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Light with a frequency of 7.30 x 10¹⁴ that lies in the violet region of the visible spectrum has a wavelength of 412nm.

In the question, we are given the frequency of light as 7.30 x 10¹⁴hz. The formular that connects frequency and wavelength is:

                     λ = v/f

Where:

If we put in the values of f and v into the formular:

                       λ = 3x10⁸ ÷ 7.30x10¹⁴

                      λ = 4.12x10⁻⁷m

The answer is in meters because the velocity of light is measured in meters per second. To convert it to nanometers, we will multiply the answer by 10⁹, hence:

                 λ = 4.12x10⁻⁷ x 10⁹

                λ = 4.12x10² = 412nm

The wavelength of a wave is the distance between two successive troughs or crests. When we say that the wavelength of a spectrum of light is 412nm, it means that the distance between two successive crests for that spectrum of light is 412nm.

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The system that controls such body processes as hormone balance, temperature and width of blood vessels is called the endocrine system.

In coordination with the nervous system, the endocrine system controls and maintains balance in the organ system. It does this by secreting hormones. The nervous system sends a signal to the endocrine system which secretes hormones to coordinate different processes in the body.

Hormones are chemical substances that circulate round the body and bind to a target cell, where they elicit a response. Special organs called endocrine glands secrete these hormones directly into the blood stream. For example, the pancreas secretes a hormone called insulin, and another one called glucagon. These two hormones work together to control the glucose levels in the blood.

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1gcmS−1 =xNS

​   =x.kg.mS ∧−2 .s

Now,  we know that

1 g=10 ∧−3

 kg and 1 cm=10 ∧−2m

Therefore, it can be written as:

10 ∧−3 kg.10 ∧−2m=x.kg.m

⇒ x=10 ∧−5

​

By using uniform motion, with an initial speed 25.43 m/s and 2.60 seconds the ball will rise maximum height.

We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule

vt = vo + a . t

vt² = vo² + 2a . s

s = vo . t + 1/2 . a . t²

where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.

From the question above, we know that

h = 33m

vt = 0 m/s

g = 9.8 m/s²

The gravitational acceleration will be negative, hence

vt² = vo² - 2g . h

0² = vo² - 2. 9.8 . 33

vo² = 646.8

vo = √646.8

vo = 25.43 m/s

Use the first equation to get the time taken

vt = vo - g . t

0 = 25.43 - 9.8t

9.8t = 25.43

t = 2.60 second

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The temperature of the oven and the other ingredients that are added are the two things that will remain constant for this Experiment.

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The maximum velocity is v= √10gh/7

The energy that an object has due to its location in a gravitational field is known as gravitational potential energy. When an object is close to the surface of the Earth, when the gravitational acceleration can be assumed to remain constant at roughly 9.8 m/s2, gravitational potential energy is most frequently used.

For the situation of the maximum velocity of the sphere when it hits the ground, the loss in gravitational potential energy is equal to the gain in translational kinetic energy and rotational kinetic energy.

mgh = mv² x I / 2.

mgh = 0.5 mv² + 0.5 (2/5 mR²)

The no-slip condition results in:

v=Rω

mgh = 0.5 mv + 0.2 mv

⟹v= √10gh/7

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The rms velocity of the gas change is [tex]2V_{rms}[/tex].

The molecules are interacting with the container walls as well as one another as they move through it at varying speeds and directions. As a result, even at the same temperature, each particle's velocity and, consequently, kinetic energy, are constantly changing.

The value of the square root of the sum of the squares of the stacking velocity values divided by the number of values is the root-mean-square (RMS) velocity. The RMS velocity is the speed of a wave traveling along a certain ray path across subsurface strata with various interval velocities.

According to the formula

[tex]V_{rms}[/tex] = √3RT/M

T"=4T

Then, [tex]V'_{rms}[/tex]= √(3R×4T)/M

[tex]V'_{rms}[/tex]=2√(3RT/M)

[tex]V'_{rms}[/tex]=2V_rms

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The correct answer 13 N.

Force causes an object to come to rest when it accelerates and causes a body to accelerate when it is at rest. Force is therefore the result of mass times acceleration. The overall force applied on a body is known as the net force. The total of all forces exerted on an object is known as the net force. There are two different types of forces: balanced forces and imbalanced forces. The term "balanced force" refers to an object that is balanced on both of its sides. Unbalanced force is defined as the movement of an item caused by an excessive force applied to one side.

Force exerted by Kam = 5N

Force exerted by Jaylan = 8N

Thus the net force = 5N + 8N

                                = 13 N

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The total time spent by the kangaroo in the air before returning to the earth is kangaroo

From the question given above, the following data were obatined:

We'll begin by obtainig the time to reach the height of 2.8 m. This is illustrated below:

h = ½gt²

2.8 = ½ × 9.8 × t²

2.8 = 4.9 × t²

Divide both side by 4.9

t² = 2.8 / 4.9

Take the square root of both side

t = √(2.8 / 4.9)

t = 0.76 s

T = 2t

T = 2 × 0.76

T = 1.52 s

Thus, the kangaroo will spend 1.52 s in the air.

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When earth catches up to a slower-moving outer planet and passes it in its orbit, in the same way that a faster runner overtakes a slower runner in an outside lane, the outer planet exhibits a retrograde motion

When a planet is far from another planet and observed from it, it rotates at a slower rate, making it appear that it is "retrograding" with regard to the other planet.

Early astronomers were perplexed when they observed motion in the sky because they attempted to explain it in terms of the geocentric idea.

Due to their commitment to the geocentrical paradigm, which stated the Earth was the center of the solar system, early astronomers were perplexed and unable to explain the phenomena.

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Consequently, an electron's speed at a very great distance is: 1.047 x 10 ^7 m/s

What is Electric Potential Energy?

The amount of work required to move one charge from infinity to a location close to the other charge is known as the electric potential energy of a system of two charged particles. When two charges exist in a system and are separated by an infinite distance, their electric potential energy is zero. The following mathematical formula can be used to express the electric potential energy of a system of two charged particles:

U =k⋅q1⋅q2/r

Where:

k is the coulomb's constant.

q1 is one of the charges.

q2 is the second charge.

initial speed of  electron u = 0 m/s

mass of an electron is m= 9.11×10^−31 kg

Let v be the final velocity of the electron

When the electron is quite distant from the fixed charge, we are asked to determine its final speed. The system is being held together by a conservative force (electron and fixed charge) (electric force). As a result, we can apply the principle of mechanical energy conservation by equating the system's beginning mechanical energy (represented by the electron and constant charge) to the system's ultimate mechanical energy as follows:

MEi = MEf

KEi + PEi = KEf + PEf

Putting the values we get,

v= 1.047 x 10 ^7 m/s

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Answer:

20

Explanation:

this this is because the temperature setting please the brains concentrate section increases

Answer:

D. Objects in which the number of negative charges equal to the positive.

Explanation:

Neutrons have no charges.

I am 100% sure.

Answer: Negative

Explanation: If electric field lines point radially toward a charge, that charge must be Negative

By transition energy, the emission of less energy in the h atom is an electron moving from n = 4 to n = 2.

We need to know about transition energy to solve this problem. Electrons in a hydrogen atom can move to another level of energy. It is also called a transition. In this process, electrons will absorb or release their energy to move. The transition energy can be determined as

ΔE = E2 - E1

where ΔE is transition energy, E2 is the final state of energy and E1 is the initial state of energy.

The state energy of a hydrogen atom can be calculated by

E = -(13.6) / n² eV

E = h.c / λ

where n is the number of energy states, h is Planck constant (4.136 x 10¯¹⁵ eV/Hz), c is speed of light (3 x 10⁸ m/s) and λ is wavelength.

From the question above, we know that

ΔE1 from n =4 to n = 2

ΔE1 from n =3 to n = 2

From the equation, we know that the transition energy is depends on the level state where

ΔE ~ (1/n2² - 1/n1²)

Hence

ΔE1 / ΔE2 = (1/n2² - 1/n1²) / (1/n2² - 1/n1²)

ΔE1 / ΔE2 = (1/2² - 1/4²) / (1/2² - 1/3²)

ΔE1 / ΔE2 = (3/16) / (5/36)

ΔE1 / ΔE2 = (3/16) / (5/36)

ΔE1 / ΔE2 = 1.35

ΔE1 = 1.35 ΔE2

Hence, the emission of less energy in the h atom is an electron moving from n = 4 to n = 2.

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