heeelllllpppp plleeeaaassseee

If a runner reaches her top speed of 9.60 m/s in 3.00 s, her total time in seconds can be determined as 21.91 s

One simple model for a person running the 200 m dash is to assume the sprinter runs with constant acceleration until reaching top speed, then maintains that speed through the finish line.

Initial velocity, u = 0 m/s

Acceleration, a = (v - u)/t

= (9.60 - 0)/3.00

= 3.20 m/s²

Distance travelled, s = 200 m

Final velocity, v = 9.60 m/s

From the first equation of motion, the final velocity can be determined as:

v = u + at

⇒ t = (v - u)/a

= (9.60 - 0)/3.20

= 3 s

Using the equation,

s = ut + 1/2 at²

for the first half of the run, we can determine the distance travelled up to the moment when the runner reaches top speed as follows:

s = 0 + 1/2 × 3.20 × (3.00/2)²

= 18.00 m

Now, the time it takes for the runner to complete the remaining 200 - 18 = 182 m can be determined as:

t = s/v

= 182/9.60

= 18.91 s

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Answer:

Infrasound vs. Ultrasound: Infrasound is sound that is below the lower limit of human hearing, below 20 Hz, and ultrasound is above the upper limit of human hearing, above 20,000 Hz.  Individuals use infrasound - this recurrence run for checking seismic tremors and volcanoes, graphing rock and oil developments underneath the earth. Infrasound is described by a capacity to get around hindrances with little scattering.  

For instance, a few creatures, for example, whales, elephants and giraffes convey utilizing infrasound over significant distances. Torrential slides, volcanoes, seismic tremors, sea waves, water falls and meteors produce infrasonic waves. Symptomatic ultrasound, additionally called sonography or demonstrative clinical sonography, is an imaging technique that utilizes high-recurrence sound waves to create pictures of structures inside your body. The pictures can give important data to diagnosing and treating an assortment of ailments and conditions.

Explanation:

idk how many words this is but its a start for u to add on to and i hope this helps and its in my own words - pls mark me brainiest

Answer:

Ultrasound vs. Infrasound Research Exploration

Beyond the limit of human hearing, ultrasound is above 20,000 Hz. Under the limit of human hearing, infrasound is below 20 Hz. Individuals use infrasound - this recurrence run for checking seismic tremors and volcanoes as well as graphing rock and oil developments beneath the earth. Infrasound is described by a capacity to get around hindrances with little scattering.  

For instance, creatures like whales, elephants and giraffes convey utilizing infrasound over significant distances. Torrential slides, volcanoes, seismic tremors, sea waves, waterfalls and meteors produce infrasonic waves. Symptomatic ultrasound, additionally called sonography or demonstrative clinical sonography, is an imaging technique that utilizes high-recurrence sound waves to create pictures of structures inside your body. The pictures can give important data to diagnosing and treating an assortment of ailments and conditions.

(Not turned in yet, but this is what i have so far. Good luck 8th graders <33)

-Sav xx

The most fundamental stage of studying matter and energy is quantum physics. It aims to comprehend the traits and behaviours of the very substances that make up nature.

According to this theory, the universe of any object transforms into an array of parallel universes with an identical number of possible states for that object, one in each universe. This occurs as soon as the potential for any object to be in any state arises.

By examining the interactions between particles of matter, quantum physicists investigate how the universe functions. This career might suit your interests if you like math or physics.

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Aswer:

False, the values ​​of the distance traveled and the displacement only coincide when the trayectorie is a straight line. Otherwise, the distance will always be greater than the offset.

Although these terms are used synonymously in other cases, they are totally different. Since the distance that a mobile travels is the equivalent of the length of its trajectory. Whereas, the displacement will be a vector magnitude.

xXCherryCakeXx.

Based on the Second Law of Newton, if the net force were doubled, a system acceleration would also doubled.

The Second law of Newton stated that when a force is working on a system, the system's acceleration will depend on the amount of force and the total mass of the system. Newton's second law can be formulated as:

F = m.a

where:

F = net force working on the system

m = mass of the system

a = system's acceleration

If the force working on a system is doubled and the system's mass remains constant, the system acceleration would:

F = m.a

F' = 2F

F' = m.a'

2F = m.a'

2(m.a) = m.a'

a' = 2a --> the system new acceleration would doubled its initial acceleration.

However, this concept would not be working if the total mass of the system is changed.

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Answer:

between -38 and 356

Explanation:

in this range it hasn't converted to solid or gas

Answer:

Since it us the resistance that causes the power output, it might be intuitive to think that more resistance produces more power but as P=I^2 * R one actually needs high current and low resistqnce. That means 75 W has lower resistance and higher current.

Now you may think that making the resistance very low, one gets the most power. Not so, as the circuit has wires, power source etc. All the have their resistance. In theory one gets the maximum power over a resistor when the resistor is half of the total resistance of the circuit. This in practice would be inefficient as one would lose half of the total power elsewhere. In practice circuits have fuses that limit the current and one gets the maximum power at the current the fuse is rated to. So if there is 20 A fuse, the maximum power is 2400 W and the corresponding resistance 6 ohm.

Answer:

Maximum pressure = 4450 N/m²

Explanation:

We'll begin by calculating the volume of the block. This can be obtained as follow:

Volume (V) = 5 cm × 3 cm × 2 cm

V = 30 cm³

Next, we shall determine the mass of the block. This can be obtained as follow:

Density = 8.9 g/cm³

Volume = 30 cm³

Mass =?

Density = mass /volume

8.9 = mass / 30

Cross multiply

Mass = 8.9 × 30

Mass = 267 g

Next, we shall covert 267 g to Kg.

1000 g = 1 Kg

Therefore,

267 g = 267 g × 1 Kg / 1000

267 g = 0.267 Kg

Thus, the mass of the block is 0.267 Kg

Next, we shall determine the force.

Force of gravity (g) = 10 N/Kg

Mass (m) = 0.267 Kg

Force (F) =?

F = mg

F = 0.267 × 20

F = 2.67 N

Next, we shall determine the minimum area since we are trying to obtain the maximum pressure. This can be obtained as follow:

Minimum area = 3 cm × 2 cm

Covert each measurement to metre (m) by dividing each measurement by 100

Minimum area = 0.03 m × 0.02 m

Minimum area = 0.0006 m²

Finally, we shall determine the maximum pressure. This can be obtained as follow:

Force (F) = 2.67 N

Minimum area = 0.0006 m²

Maximum pressure =?

Maximum pressure = Force /minimum area

Maximum pressure = 2.67 / 0.0006

Maximum pressure = 4450 N/m²

No, a balloon charged to several thousand volts does not necessarily mean it has several thousand joules of energy.

Voltage (V) is the electric potential difference between two points in a circuit, and it measures the amount of energy required to move a unit charge between those points.

Energy (E) is the capacity to do work, and it is measured in joules (J).

Charge (Q) is the amount of electric charge, measured in coulombs (C).

The relationship between voltage, energy, and charge can be expressed using the formula:
E = Q x V
In the case of a charged balloon, the amount of energy stored in the balloon depends on both the voltage and the charge.

A high voltage alone does not determine the energy stored in the balloon, as the charge present on the balloon must also be taken into account.

A balloon can have a high voltage, but if the charge is small, the total energy stored in the balloon will not necessarily be several thousand joules.
For example, if a balloon has a charge of 1 microcoulomb (1 x \(10^{-6}\) C) and is charged to 2000 volts, the energy stored in the balloon can be calculated as follows:
E = Q x V = (1 x \(10^{-6}\) C) x (2000 V) = 0.002 J
As you can see, even though the voltage is several thousand volts, the energy stored in the balloon is only 0.002 joules, which is significantly less than several thousand joules. Therefore, a balloon's voltage alone does not determine the amount of energy stored in it.

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Speed of plane, x = 616 mph and speed of wind, c = 56 mph

Time rate at which an object is moving along a path is known as speed, whereas velocity is the rate and direction of the movement of object.

Let x be the speed of plane and c be the speed of wind

then x - c = speed without wind; and x + c= speed with wind

We know, distance=speed* time

2hr30min = 150 min=2.5 hr

1680 =(x-c)* 3

1680 =3x -3c --- (1)

1680 = (x+c)* 2.5

1680 =2.5x+2.5c ----(2)

Multiply equation (1) with 2.5 and equation (2) with 3

4200 = 7.5x -7.5c  

5040 =7.5x + 7.5c

Adding these 2 equation to eliminate c

9240 =15 x

Speed of plane, x = 616 mph

1680 =3x -3c

3c =3x-1680

3c =3(616) -1680

3c =168

Speed of wind, c = 56 mph

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Answer:

Velocidad en m / s = 72,25 m / s

Explanation:

Dado

Distancia a recorrer por el coche de carreras = 87 Km

1 km = 1000 m

Por lo tanto, 87 km = 87000 m

Tiempo necesario para viajar 87 km / 87000 metros = 20 minutos o 20 * 60 = 1200 segundos

Velocidad en m / s = 87000/1200

Velocidad en m / s = 72,25 m / s

Galaxies farther away from us exhibit higher rates of motion compared to nearby galaxies.

This phenomenon is known as the cosmological redshift and is attributed to the expansion of the universe. According to Hubble's Law, the recessional velocity (v) of a galaxy is proportional to its distance (d) from us: v = H₀ × d, where H₀ is the Hubble constant.

As space itself expands, it carries galaxies along with it, causing their wavelengths to stretch and shift towards longer (red) wavelengths. This shift is observed as a redshift in the light emitted by distant galaxies.

Thus, by measuring the redshift of galaxies, astronomers can determine their recessional velocities and infer their distances from us. The greater the distance, the faster the apparent motion due to the expanding universe.

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To find the tension in the rope, we can use the equation: v = fλ, where v is the speed of the wave, f is the frequency, and λ is the wavelength.

The speed of a wave on a rope is given by: v = √(T/μ), where T is the tension in the rope and μ is the mass per unit length of the rope.
We can rearrange this equation to solve for T: T = μv^2
Substituting the expression for v from the first equation, we get:
T = μ(fλ)^2
Plugging in the given values, we get:
T = (0.110 kg / 2.10 m)(36.0 Hz)(0.760 m)^2
T = 37.5 N
Therefore, the tension in the rope must be 37.5 N for transverse waves of frequency 36.0 Hz to have a wavelength of 0.760 m.

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Answer:

D hope this helps plz mark brainliest

Explanation:

The potential energy of the ball has increased during energy transfer.

If the ball rolls and stops, the kinetic energy from rolling and friction turns into potential energy.

Potential energy is relative position, kinetic energy is relative to motion.

The main relationship between the two is their ability to transform into each other. That is, potential energy turns into kinetic energy, kinetic energy turns into potential energy, and back again. It's an endless cycle.

Let's look at another example. Suppose there is a book on the table.

When the book is at rest, it has potential energy. However, if you accidentally drop it off the table, that potential energy is converted into kinetic energy, causing the book to move and fall. However, as soon as the book hits the ground, this kinetic energy is converted into potential energy.

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Answer:

Explanation:

1. A parsec is defined as the distance from the Sun which would result in a parallax of_TWO____ arcsecond as seen from Earth when observed 6 months apart.

2. One parsecs is about_3.3____light years

3. The more distant a star, the_LESS ____its parallax.

4. The statement "we can measure stellar parallax for most stars in our galaxy" is__TRUE .___.

5. The closest stars have parallaxes smaller than_.002 _____arcsecond.

6. The first successful measurements of stellar parallax were made by_Friedrich Bessel_____in year_1838_____for the star named.

7. Star Fred has parallax four times greater than star Bob. Star Fred is__4____times_nearer_____than star Bob.

Answer:

Fin Lin = Fo Lo  Work = Work out where in = input and o = output

Fin / Fo = Lo / Lin = 30 / 60 = 1/2   (input force = 1/2 output force)

Lin + Lo = 3

Lo = 3 - Lin

1/2 = (3 - Lin) / Lin    from above

1/2 = 3 / Lin - 1

3 / Lin = 1.5   and Lin = 2

So the input length = 2 m and the output length = 1 m

SWOT Analysis Strengths- Paley’s Products has a low overhead cost with the company operating at a high level of efficiency, resulting in competitive pricing.- They have a team of experienced employees who have worked in the industry for several years.- They have a variety of products in the portfolio that can satisfy customers from different sectors.- They are reputable and have a loyal customer base.Weaknesses- They have been slow to adopt new technology, and this may be a disadvantage to the company.- Limited marketing and sales promotion are affecting their sales revenue.-

They depend on a few key customers for the bulk of their sales revenue, leaving them vulnerable to market changes.Opportunities- Expansion of the product line to include unique products.- The establishment of strategic partnerships with other businesses in the industry.- Exploration of new markets, such as international markets.- Improvement of marketing techniques to increase brand awareness.Threats- Changes in consumer preferences towards environmentally friendly products.- Increase in competition from other businesses in the industry.- Fluctuating market prices for raw materials that may lead to price increases.

Strategic Actions to be taken by Paley Products1. Development of an E-commerce platform to allow online transactions with customers. The E-commerce platform will enable Paley to reach a wider customer base, expand its reach, and increase sales revenue.2. Investment in the research and development of new environmentally friendly products. Paley will remain competitive and cater to the needs of consumers who prefer green products.3. Establishment of strategic partnerships with other businesses in the industry to leverage the strength of other companies in the industry and to develop new products or increase market share.4. Improvement of marketing techniques to increase brand awareness and improve visibility. A marketing strategy that incorporates social media and other digital channels can help promote the brand to potential customers.5. Expansion into international markets. This will enable Paley to diversify its customer base and generate more revenue. Paley can start by targeting nearby countries, then expand globally as they gain more experience and financial stability.

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Answer: B

Explanation: efficiency is the useful energy supplied; useful energy supplied doesn't not change,
work done stays constant

in order to to increase the power of the motor, time would have to be decreased to get the wanted result..

When he  increases the input power to the motor and repeats the experiment, work done stays the same but time taken decreases.

The quantity of energy moved or converted per unit of time is known as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in ancient writings. A scalar quantity is power.

A motor's output power is calculated by multiplying its torque output by the angular velocity of its output shaft.

To lift a load through a vertical distance of 2.0m, in the both cases same amount of work-done happens because the displacement is same.

But as the input power, in second case, increases but the efficiency of the motor does not change, the time taken decreases ( as time taken = work done/power)

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Measurements of one Paramecium cell performing the barium dance show that it is moving to the left at 100 μm/s before adding barium, the average acceleration of the cell is 20 μm/s².

The formula for average acceleration can be used to get the cell's average acceleration:

\(\[ \text{Average Acceleration} = \dfrac{\text{Change in Velocity}}{\text{Time Interval}} \]\)

Given values:

Initial velocity (\(\(v_i\)\)) = 100 μm/s (to the left)

Final velocity (\(\(v_f\)\)) = 200 μm/s (to the right)

Time interval (t) = 5 seconds

The change in velocity is the difference between the final velocity and the initial velocity:

\(\[ \text{Change in Velocity} = v_f - v_i \]\)

Substitute the values:

\(\[ \text{Change in Velocity} = 200 - 100 \\\\= 100\)

Now, plug this into the formula for average acceleration:

\(\[ \text{Average Acceleration} = \dfrac{\text{Change in Velocity}}{\text{Time Interval}}\\\\ = \dfrac{100 }{5 }\)

= 20 μm/s².

Therefore, the average acceleration of the cell is 20 μm/s².

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Answer:

a.

Explanation:

substance abuse

Answer:

substance abuse

Explanation:

Answer:

(A). The force acting on the rocket is mg.

(B). The initial upward acceleration of the rocket is 6.2 m/s²

Explanation:

Given that,

Mass of rocket = 5 kg

Force = 80 N

Time = 4 sec

(A). We need to draw the figure

The force acting on the rocket at each of the intervals is shown in figure.

The force acting on the rocket is mg.

(B). We need to calculate the initial upward acceleration of the rocket

Using balance equation

\(ma=F-mg\)

\(a=\dfrac{F-mg}{m}\)

Put the value in the equation

\(a=\dfrac{80-5\times9.8}{5}\)

\(a=6.2\ m/s^2\)

Hence, (A). The force acting on the rocket is mg.

(B). The initial upward acceleration of the rocket is 6.2 m/s²

The main factor that causes the current to flow is the voltage difference between two points. When there is a difference in electrical potential between two points, the flow of electrons or charges in a circuit is initiated. The voltage difference creates an electric field that drives the charges to move from one point to another.

The other options listed, such as current similarities, points of equal resistance, and resistance differences, are important factors in understanding the behavior of the current flow, but they are not the direct cause of the current. Current similarities and points of equal resistance will result in a steady-state current flow, whereas resistance differences will result in a non-uniform current distribution. Therefore, it can be concluded that the answer to the question "What causes the current to flow?" is E) voltage difference between the two points. Understanding this fundamental concept is crucial in the study and application of electrical circuits and electronics.

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The turtle's position and direction appropriately after each instruction to ensure accurate drawing. You can also customize the colors, sizes, and shapes to enhance the visual appearance of the AND gate.

To draw an AND gate using turtle graphics, you can use the following set of instructions:

Set up the turtle:

a. Set the turtle's initial position.

b. Set the turtle's pen color and size.

Draw the first input line:

a. Move the turtle forward to the starting point of the line.

b. Draw a straight line segment to represent the first input.

Draw the second input line:

a. Move the turtle to the starting point of the second line.

b. Draw a straight line segment to represent the second input.

Draw the output line:

a. Move the turtle to the starting point of the output line.

b. Draw a straight line segment to represent the output.

Draw the logic gate shape:

a. Move the turtle to the starting point of the gate.

b. Draw a rectangle to represent the gate.

c. Add any necessary labels or symbols to indicate it as an AND gate.

Add connections between lines and gate:

a. Move the turtle to the intersection point of the first input line and the gate.

b. Draw a small line segment to connect the input line to the gate.

c. Repeat the above step for the second input line and the gate.

d. Draw a small line segment to connect the output line to the gate.

Repeat the above steps as necessary to draw multiple AND gates or any additional components.

Remember to adjust the turtle's position and direction appropriately after each instruction to ensure accurate drawing. You can also customize the colors, sizes, and shapes to enhance the visual appearance of the AND gate.

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The correct answer is that the two items will either be drawn together or pushed apart, according to the stated statement.

Electricity is created when voltage increases to or subtracted from an object. Since atoms have a negative charge, an object gets an ions when electrons are transferred to it. When an object's electrons are taken away, it develops a positive charge.

All matter has an inherent electric charge, which results from the inclusion of atoms like protons, electrons, and neutrons. The quantity of protons, electrons, and neutrons an atom has affects its charge. Positive or negative charges can exist in an electric field. Protons produce positive charge, while electrons produce negative charge.

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Answer:

A 2.5 g bullet traveling at 350 m/s hits a tree and slows uniformly to a stop while penetrating a distance of 12 cm into the tree's trunk. What is the initial kinetic energy of the bullet? 153.125 J Correct: Your answer is correct.Jan 8, 2020

Explanation:

Answer:

The desk is pushing back on Arianna

Explanation:

If you read newton's 3rd law, it states that for every action force (Arianna pushing the desk), there is an equal reaction force (The desk pushing back on her). This is true for EVERY OBJECT THAT HAS MOTION!

The acceleration of the 1.0 kg box would be 4.9 m/s²

The rate at which velocity changes with reference to both speed and direction over a period of time is referred to as acceleration. If a point or an object that is moving in a straight line speeds up or slows down, then the point or object is accelerating.

To find the acceleration, we can use this following formula:

a = ((m₂ – m₁) × g)) ÷ m1

Where:

a = acceleration

m₁ = the mass of the object 1

m₂ = the mass of the object 2

g = acceleration due to gravitation  (9.8 m/s²)

Thus, the acceleration of a 1.0 kg box would be:

A = ((1.5 kg – 1 kg) × 9.8 m/s²) ÷ 1 kg

A = 4.9 m/s²

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The vertical vector component of a ball kicked at an angle of 58 degrees with an initial velocity of 82 feet per second is 57.568 feet per second.

The vertical vector component is found by multiplying the initial velocity by the sine of the angle of inclination.

In this case, the sine of 58 degrees is 0.814155, so the vertical vector component is

82 * 0.814155 = 57.568 feet per second.

The vertical vector component represents the velocity of the ball in the vertical direction.

As the ball travels through the air, the vertical vector component will decrease due to the force of gravity.

However, the horizontal vector component will remain constant.

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