How are engineers creating clothing that can charge your cell phone. Explain the science behind their innovation.

Answer:

Gravitational potential energy

Explanation:

PE = m*g*h

m = mass

g = 9.81m/s², acceleration of gravity

h = height

So m and g stay the same but the height can change so the higher you go the higher the Gravitational potential energy.

Placing a soccer ball on the top shelf increases the Gravitational potential energy

In a gravitational field the energy possessed by an object due to a change in its position called as gravitational potential energy, it is an energy that is related to gravitational force or to gravity.

When a mass of the body  (m) is moved from infinity to a point inside the gravitational influence of a source mass (M) in absence of acceleration and the amount of work done in displacing it into the source field is stored in the form of potential energy denoted with the symbol Ug.

when external force is applied, then the  position of the body changes potential energy is equal to the amount of work done on the body by the forces.

The gravitational influence on a body at infinity is zero, then the  potential energy is zero, PE = m*g*h where m = mass, g = 9.81m/s², acceleration of gravity, h = height

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The simplest form of electricity is static electricity.

Static electricity is the buildup of electric charges on an object or surface. It is the most basic and commonly observed form of electricity and can be seen in everyday occurrences such as when a balloon sticks to a wall after being rubbed against someone's hair, or when a person gets a small shock after touching a metal doorknob.

Static electricity occurs when there is an imbalance of electric charges on an object or surface, causing a buildup of electric potential energy. This buildup can be discharged, or released, through a spark or electric shock.

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Answer:

An atom is the smallest part of an element by itself, while molecules are built of multiple atoms.

If someone is a "weekend warrior," meaning they only participate in physical activity on the weekends, there are a few things a trainer could do to help them stay safe and get the most out of their workouts:

1. Be their coach: A trainer can act as a coach, guiding the individual through their workouts and helping them to improve their form and technique. They can also help the individual set realistic goals and create a training plan that takes into account their limited time for physical activity.

2. Include exercises that mimic the activity: To help the individual prepare for their chosen activity, the trainer can include exercises that mimic the specific movements involved in that activity. For example, if the individual enjoys playing tennis on the weekends, the trainer could include exercises that focus on improving their agility, footwork, and upper body strength.

3. Emphasize safety: It is important for the trainer to emphasize safety, especially if the individual is only participating in physical activity on the weekends. They can help the individual warm up properly before their workouts, use appropriate equipment, and avoid overexertion or pushing themselves too hard.

4. Modify the program: If the trainer determines that the individual's chosen activity is not safe for them due to pre-existing health conditions or injuries, they can modify the program to include other activities that are safer for the individual.

Therefore, a trainer can be a valuable resource for weekend warriors, helping them to stay safe, improve their performance, and achieve their fitness goals.

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Answer: the motor ......................................................................

Answer:

The top

Explanation:

Potential energy is the product of height, acceleration due to gravity, and mass, so the higher the height is, the higher the potential energy.

This means that at the very top point of the rollercoaster, you will have the most potential energy.

Based on the given information, when balls A and B collide, they exchange momentum. The set of arrows in Figure 2 that best represents this change in momentum would be the arrows pointing in opposite directions. This is because when the balls collide, the momentum of ball A is transferred to ball B, while the momentum of ball B is transferred to ball A, causing them to move in opposite directions.


When two balls (A and B) collide, the change in their momentum can be understood using the principle of conservation of momentum. The total momentum before the collision is equal to the total momentum after the collision.

1. Calculate the initial momentum of both balls before the collision.
Initial momentum of ball A = mass of A × initial velocity of A
Initial momentum of ball B = mass of B × initial velocity of B

2. Calculate the final momentum of both balls after the collision.
Final momentum of ball A = mass of A × final velocity of A
Final momentum of ball B = mass of B × final velocity of B

3. Apply the conservation of momentum principle:
Initial momentum of ball A + initial momentum of ball B = final momentum of ball A + final momentum of ball B

The change in momentum can be represented by arrows that indicate the direction and magnitude of the change in momentum for each ball. The combination of these arrows for balls A and B should conserve the total momentum, as per the principle mentioned in step 3.

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Answer: 6

Explanation:

The shuttlecock that is kicked upward from the roof edge of a tall building at the speed of 4m/s after 3s will have a velocity of: -25.4 m/s (the value is negative due to the object is going down)

The formula for the vertical launch upward and the procedure we will use is:

vf = v₀ - g * t

Where:

Information about the problem:

Applying the final velocity formula we get:

vf = v₀ - g * t

vf = 4 m/s - 9.8 m/s² * 3 s

vf = 4 m/s - 29.4 m/s

vf = -25.4 m/s

this negative value indicates that the object is going down

In physics vertical launch upwards is the motion described by an object that has been launched vertically upwards in which the height and the effect of the earth's gravitational force on the launched object are taken into account.

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more than mg

Explanation:

the pressure

Energy is defined in science as the ability to move matter or change matter in some other way.

In a binary system, two stars orbit around a common center of mass. One of the unique events that can occur in a binary system is a type of stellar explosion known as a supernova.

This occurs when one of the stars in the binary system runs out of fuel and collapses, causing a massive explosion that can outshine an entire galaxy. Another event that can occur in a binary system is a tidal disruption event, where one star is torn apart by the gravitational forces of its companion star. This can also result in a sudden increase in luminosity, although not as bright as a supernova. In addition, binary systems can also exhibit periodic variations in their luminosity due to eclipses, where one star passes in front of the other from our vantage point on Earth. This can be used by astronomers to study the properties of the stars in the binary system, such as their sizes and masses. Overall, while various events can occur in a binary system, supernovae are thought to have about the same luminosity due to the fact that they are caused by the same type of stellar explosion. This allows astronomers to use them as a standard candle for distance measurements in the universe.

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Shale,sandstone, and limestone are the most common types of sedimentary rocks.

Answer: prevent excitation light from reaching the detector

Explanation:

A fluorometer refers to the device that's used in the measurement of parameters that are of visible spectrum fluorescence. They also prevent excitation light from reaching the detector.

These parameters are used in the identification of the amount and presence of molecules in a medium.

Blurring the background and foreground of the main subjects in photographs can create a calming effect, option D.

This technique is often used in portrait photography to make the subject stand out and appear more prominent. By blurring the surrounding elements, the viewer's focus is drawn towards the subject, creating a sense of serenity and isolation. This effect is particularly effective when the background and foreground are busy or distracting. However, it is important to note that the impact of this technique on the viewer can also depend on the specific composition and context of the photograph. Blurring the background and foreground is not likely to create a monotonous and calming effect (option D), as the blurred elements can still convey a sense of movement or depth, which can be visually engaging.

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The average velocity over the specified time intervals is 40 - 16t.

The average velocity can be determined using the formula: Average velocity = change in displacement / change in time.

In this case, the change in time is represented by t seconds. Therefore, the change in displacement can be calculated by finding the difference between the height at t seconds and the initial height.

The initial height (u) is considered to be 0 meters. The height at t seconds (s) can be represented by the equation v(t) = 40t - 16t^2, where v(t) represents the height at time t.

The displacement is given by the equation s - u = 40t - 16t^2 - 0 = 40t - 16t^2.

Thus, the average velocity over the given time intervals can be expressed as follows:

Average velocity = (change in displacement) / (change in time)

                       = (40t - 16t^2 - 0) / (t - 0)

                       = 40 - 16t.

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The molecules move from one side to another across the concentration gradient by breaking weaker bonds among the atom into stronger bonds. This is done to decrease the overall kinetic energy to become a more stable molecule.

The kinetic strength of the molecules consequences in random movement, causing diffusion. In simple diffusion, this method proceeds without the useful resource of a transport protein. it is the random motion of the molecules that reasons them to move from a place of excessive attention to a place with decreased awareness.

The molecules in a gas, a liquid, or a strong are in consistent movement due to their kinetic electricity. Molecules are in steady movement and collide with each different. those collisions cause the molecules to move in random guidelines. over time, however, greater molecules may be propelled into the less concentrated place.

The majority of the molecules flow from better to decrease awareness, although there can be some that circulate from low to excessive. the general (or net) motion is consequently from high to low concentration.

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The average January sea level temperature at points A, B, C, D, E, F, G, and H is 57.75 degrees Fahrenheit.

To find the average temperature of eight points, we added all the temperatures and divided them by the number of temperatures (8).

70 + 55 + 80 + 72 + 80 + 50 + 25 + 60 = 462

Then divide the sum of all temperatures by the number of temperatures (8) to find the average temperature: 462 / 8 = 57.75

So the average January sea level temperature at points A, B, C, D, E, F, G, and H is 57.75 degrees Fahrenheit.

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Answer:

deuteron

Explanation:

Answer:

C. The Third Picture

Explanation:

EDGE 2021

Answer:

The ball would fall vertically for 112.45m

Explanation:

The vertical height of a horizontal throw is affected only by the speed of the throw and the acceleration due to gravity.

At this point, we may use this formula to determine the vertical height of the throw

vertical height =

The initial throwing speed has to be converted to m/s to ensure uniformity during the calculations. To do this we multiply by 1000 and divide by 3600

169.1km/hr = 46.972m/s

Maximum height =  m

The pitch would make the ball fall vertically for 112.45m by the time it reached the home plate 18.2 m away

Answer:

The ball's vertical displacement 5.7 cm

Explanation:

Given:

V₀ = 169.14 m

D = 18.3 m

g = 9,81 m/s²

____________

Δh - ?

Ball flight time:

t = D / V₀ = 18.3 / 169.14 ≈ 0.108 s

The ball's vertical displacement:

Δh = g·t² / 2

Δh = 9.81·0.108² / 2 ≈ 0,057 m    or  5.7 cm

Answer:

Acceleration (a) = 6 m/s²

Total distance travel by car(s) = 75 meter

Explanation:

Given:

Initial velocity (u) = 0

Final velocity (v) = 30 m/s

Time (t) = 5 sec

Find:

Total distance travel by car(s) = ?

Acceleration (a) = ?

​Computation:

v = u +at

30 = 0 + a(5)

30 = a(5)

Acceleration (a) = 6 m/s²

Total distance travel by car(s) = ut +1/2(a)(t)²

Total distance travel by car(s) = 1/2(a)(t)²

Total distance travel by car(s) = (0.5)(6)(5)²

Total distance travel by car(s) = 75 meter

A. Electrical energy  B. Elastic energy  are the forms of potential energy.

Potential energy is the energy possess by an object because due to its position relative to other objects, stresses within itself, its electric charge, or other factors.

Types of Potential energy:

Therefore,

Electrical energy , Elastic energy are the forms of potential energy.

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Answer: \(-\frac{1}{2}\times \frac{d[Br^.]}{dt}=+\frac{d[Br_2]}{dt}\)

Explanation:

Rate of a reaction is defined as the rate of change of concentration per unit time.

Thus for reaction:

\(2Br^.\rightarrow Br_2\)

The rate in terms of reactants is given as negative as the concentration of reactants is decreasing with time whereas the rate in terms of products is given as positive as the concentration of products is increasing with time.

\(Rate=-\frac{d[Br^.]}{2dt}\)

or \(Rate=+\frac{d[Br_2]}{dt}\)

Thus \(-\frac{d[Br^.]}{2dt}=+\frac{d[Br_2]}{dt}\)

Answer:

here we go

Explanation:

\(density \: = mass \div volume \\ mass \: = density \times volume \\ \\ but \: our \: volume \: is \: in \: cubic \: metres \\ convert \: it \: to \: cubic \: centimeters \\ volume \: = 25 \div {(100)}^{3} \\ = 2.5 \times 10^{ - 5} cm^{3} \\ \\ mass = 11 \times (2.5 \times 10 ^{ - 5} ) \\ = 2.75 \times 10 ^{ - 4} grams\)

give me a brainliest atleast

Answer:

the object is moving forward but it is slowing down

Explanation:

negative acceleration becomes when the intiall velocity becomes greater than the final which means if it is initially greater but finally smaller that means it is slowing down but moving forward

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Answer:

563.8 gram

Explanation:

The VOLUME of the titanium is 125 ml  ( the volume of water displaced)

125 ml = 125 cc

125 cm^3   *  4.51 g/cm^3 = 563.8 g

Answer:

C. Style

Explanation:

Because if your letters are slanted, it's not mechanical, is it? Neither is it emotional, since that's just not right. As for physical, how is your letters being slanted physical? Therefore, the best answer would be C. Style.