Robb wants to win the next sled race. He asks for your advice. What would you tell him he should change in order to win? Explain why your solution would work in terms of energy.

The final volume of water in the container after increasing the temperature is 203.8 m³.

From the given,

The initial volume of water (Vο) = 200 cm³

Initial temperature = 4°C = 4+273 = 277K

Final temperature = 95°C = 273+95 = 368 K

Volume expansion co-efficient = 210×10⁻⁶(°C)⁻¹

Final volume =?

β = 1/Vο (ΔV/ΔT),  β represents the volume expansion coefficient, ΔV change in volume, ΔT is the change in temperature, and Vο is the initial volume.

ΔV = β×Vο×ΔT

     = 210×10⁻⁶×200×(368-277)

    =  210×10⁻⁶×200×91

ΔV = 3.83 m³

ΔV = final volume - initial volume

final volume = ΔV + 200

                    = 3.82 +200

                    = 203.82 m³

Final volume = 203.82 m³.

Thus, the final volume of the water is 203.82 m³.

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The power output of the pocket calculator's solar cells is approximately 0.000318 W.

To calculate the power output of the pocket calculator's solar cells, we can use the formula:

Power (P) = Voltage (V) × Current (I)

First, we need to calculate the current flowing through the solar cells using the charge and time values:

Current (I) = Charge (Q) / Time (t)

Charge (Q) = 6.50 C

Time (t) = 8.50 h

Voltage (V) = 1.50 V

Let's substitute these values into the equations and calculate the power output:

1. Convert the time from hours to seconds:

  t = 8.50 h × 3600 s/h

  t = 30600 s

2. Calculate the current:

  I = Q / t

  I = 6.50 C / 30600 s

  I ≈ 0.000212 s⁻¹

3. Calculate the power output:

  P = V × I

  P = 1.50 V × 0.000212 s⁻¹

  P ≈ 0.000318 W

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Science has established that energy can only change forms; it cannot be created or destroyed. As a result, some reactions either release energy because their products have less energy than their reactants.

A: This statement is untrue because a process cannot absorb energy if the reactants are more energetic than the products.

B: Is true since energy will be released into the environment in a reaction where the products have less energy.

C: Is erroneous because every chemical reaction involves the transfer of energy.

Because energy cannot be "lost," option D is erroneous. However, it cannot be released into the environment.

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Answer:

The radius is  \(r = 3.21*10^{4} \ m\)

Explanation:

From the question we are told that  

   The density is  \(\rho = 2000 \ kg/m^3\)

    The speed is  \(v = 24 \ m/s\)

Generally the largest radius of the asteroid is mathematically represented as

      \(r = \frac{v^2}{ \sqrt{G * \rho * [\frac{4}{3} ] * \pi} }\)

=>   \(r = \frac{24^2}{ \sqrt{ 6.67*10^{-11} * 2000 * [\frac{4}{3} ] *3.142 } }\)

=>   \(r = 3.21*10^{4} \ m\)

The figure shows about the rotating earth.

To find the correct option among all the options, we need to know about the rotation state of earth.

Motion of earth about its own axis is known about its rotation motion.

In revolving and orbital motion, an object moves around an axis out side of that bulk of object in a certain orbit, while in rotational motion, the object moves around its own axis.

Rotation motion is represented by drawing an axis in the bulk of object and to indicate the rotation a circular arrow is drawn.

Thus, we can conclude that the figure shows about the rotating earth.

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Answer:

connect two 9 ohms resistance in series now it becomes 18 ohm

The correct answer is: All of these answers are correct.

All the provided explanations can be plausible reasons for the low adoption of a cookstove intervention in rural Bangladesh. It is important to consider factors such as technology maintenance, regional cooking preferences, and the suitability of the chosen stove for the user's level of education.

All of these factors can significantly impact the acceptance and adoption of a new cooking technology.It would hinder their ability to effectively use and benefit from the intervention.

Considering these factors collectively provides insight into why the adoption rate remained low. Addressing these issues is crucial to improving the acceptance and success of cookstove interventions in rural communities.

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The universe will expand forever.

Why is it said the universe will expand forever?

Cosmologists generally agree that the universe has a "flat" shape (i.e., parallel lines remain parallel) and will expand indefinitely. If the mean density falls below the critical density, there won't be enough matter in the universe to stop the expansion; the cosmos will continue to grow indefinitely. The galaxies will eventually grow progressively further apart. Everything in the universe is included, from the tiniest molecule to the greatest galaxy. The cosmos has been growing since the Big Bang approximately 13.7 billion years ago, and its size may be unlimited.

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A parametrization of a curve in the xy plane is a method of expressing the coordinates of each point on the curve as functions of a single parameter.

A parametrization of a curve in the xy plane is a method of expressing the coordinates of each point on the curve as functions of a single parameter. When a curve is given in terms of parametric equations, it is possible to define the curve using a set of parametric equations.

A curve is defined as a continuous function of at least one variable. A curve in the xy-plane is a graph that consists of a set of points (x,y), where x and y are real numbers.

A parametric curve is a curve that is defined using parametric equations, which are equations that express the coordinates of each point on the curve as functions of a single parameter. The parameter is usually denoted by t, but it can be any letter or symbol.

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Answer:

See explanation

Explanation:

Given that;

q1 and q2 are the magnitudes of the two charges while r1 is the distance between the charges.

F1 =kq1q2/r1^2

Then,

F2 = kq1q2/(2r1)^2

F2 = kq1q2/4r1^2

So,

F2 = 1/4 F1

The force between the charges changes by a factor of 1/4.

Answer: When a beam of sunlight strikes a molecule in the atmosphere, what's called "scattering" occurs, sending some of the light's wavelengths off in different directions.

Explanation:

Answer:

The Answer is: ∴t=150 nm.

No, the object's displacement and distance traveled will be equal; however, because the object's initial position is unknown, the object's position may differ from its displacement and distance traveled.

Because the initial position is not provided, we cannot assert that the displacement or distance equals the position. We might have arrived at a different conclusion if the starting point had been zero, because the distance from zero equals the position.

What precisely do you mean by position, displacement, and distance?

The location of an object (whether a person, a ball, or a particle) at a given point in time is referred to as its position. The displacement of an object is the difference in its position from one time to the next. Distance is the total amount the object has traveled in a certain period of time.

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Answer:

may be upside down alphabet :"T"

Explanation:

Answer:

B

Explanation:

i worked it out on a diffrent sheet so its hard to explain

The current, according to Ohm's law if, if The voltage between two points in a circuit is 5 V and the resistance between the points is 80 ohms, is 0.063 A so, option B is correct.

Electric currents can be created by the movement of any electric charge carriers, including ions (atoms that have gained or lost one or more electrons), holes, or subatomic charged particles (such electrons with a negative charge or protons with a positive charge) (electron deficiencies that may be thought of as positive particles).

Given:

The voltage between two points in a circuit is 5 V,

If the resistance between the points is 80 ohms,

Calculate the current using Ohm's law as shown below,

Current = The voltage between two points / the resistance between the points

Current = 5 / 80

Current = 0.0625

Current = 0.063 A,

Thus, the current according to Ohm's law is 0.063 A.

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To find the radius value of a star, you must first measure its apparent brightness and its distance from Earth.

These two measurements are essential because they help astronomers calculate the star's luminosity, which is the total amount of energy it emits per second. Once the luminosity is known, scientists can use a mathematical equation called the Stefan-Boltzmann law to determine the star's surface temperature. Finally, by combining the temperature with the luminosity, astronomers can calculate the star's radius. This process is essential for understanding a star's physical properties and can provide valuable insights into its life cycle and behavior. Overall, measuring the apparent brightness and distance of a star is critical for determining its radius value and unlocking many other mysteries about these fascinating celestial objects.

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As the number of resistors in a series circuit increases, the overall resistance increases.

A series circuit is a current pathway that lets electrons flow to one or more resistors.

In series circuit, the current flowing in each circuit component is the same, while the voltage across the circuit components are differnt.

The equivalent resistance of a series curict is obtained by adding all the inididual resistance of the circuit.

Re = R1 + R2 + R3

where;

So in a series circuit, as the number of resistance increases, the overall resistance or equivalent resistance increases.

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Answer:r other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by

Explanation:

Activity: Is it the same?!

Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by scattering the reflected light rays in all directions.

Some of the earliest accounts of light reflection originate from the ancient Greek mathematician Euclid, who conducted a series of experiments around 300 BC, and appears to have had a good understanding of how light is reflected. However, it wasn't until a millennium and a half later that the Arab scientist Alhazen proposed a law describing exactly what happens to a light ray when it strikes a smooth surface and then bounces off into space.

In this activity you will be working as an engineer that is working to modify different kinds of digital cameras and to study the effect of changing incident angle on the reflected angle.

Method

Explain the steps of your experiment and identify the scientific variables:

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

• Independent Variable

----------------------------------------------------------------------------------------------------------------

• Dependent Variable

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

if anyone does ib myp 3. pleaseeee helppp im gonnnnaaa fail.

sciences by concept myp 3 formative assesment.

im giving 50 points please just help meeeeeeeeeeee

A gamma ray has more energy than a radio wave because it has a shorter wavelength and a higher frequency

Answer: A gamma ray has more energy than a radio wave because it has a shorter wavelength and a higher frequency

Answer:

The reason it hurts more to fall on a concrete floor than on grass is due to a combination of factors

When you fall, your body's momentum causes it to continue moving until it comes into contact with an object that can stop it. When you fall on a concrete floor, the surface is hard and rigid, which means that it can stop your body's motion more quickly and with more force. This results in a greater impact force on your body, which can cause more damage and more pain.

On the other hand, when you fall on grass, the surface is soft and yielding, which means that it can absorb some of the impact force. This results in a lower impact force on your body and therefore less damage and less pain.

Another factor that comes into play is the time of contact. When you fall on a concrete floor, the time of contact is shorter, which means that the impact force is concentrated over a shorter period of time. This can increase the intensity of the force and make it more painful. On the other hand, when you fall on grass, the time of contact is longer, which means that the impact force is spread out over a longer period of time. This can decrease the intensity of the force and make it less painful.

In summary, it hurts more when you fall on a concrete floor than on grass because the concrete floor is a harder surface that can stop your body's motion more quickly and with more force, resulting in a greater impact force and a shorter time of contact.

Answer:

According to C++ syntax, It's 50

These brown dwarfs can be distinguished from other star-like objects because they exhibit absorption lines from the ammonia molecule in the spectra.

Brown dwarfs are star-like (small) objects in the external space that exhibit very low cold temperatures.

Brown dwarfs are not only small stars but also huge gaseous planets such as Saturn and Jupiter.

In consequence, brown dwarfs are a wide category that includes both planets and star-like objects.

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Answer:

E.  All of the Above

Explanation:

By doing any kind of exercise or physical activity, you are increasing your overall health.  Your muscle strengthen because of the jumping and movement of arms.  You are more alert because you have to time each jump right in order to keep going.  By breathing evenly while jumping, you do help your Cardiorespiratory fitness as well.  And of course, you increase your athletic ablility over all with much endurance and practice.

Answer:

v₂ = 1.8 [m/s]

Explanation:

To be able to solve this problem we must raise the principle of conservation and quantity of movement. It is going to study the momentum before and after the firing of the rifle.

P = m*v

where:

P = momentum [kg*m/s]

m = mass [kg]

v = velocity [m/s]

Now we need to analyze the moment before and after the shot.

\((m_{1}+m_{2})*v_{1}=-(m_{1}*v_{2})+(m_{2}*v_{3})\)

where:

m₁ = mass of the rifle = 5 [kg]

v₁ = velocity of the rifle and the bullet before firing = 0 (no movement)

m₂ = mass of the bullet = 15 [g] = 0.015 [kg]

v₂ = velocity of recoil [m/s]

v₃ = velocity of the bullet after firing = 600 [m/s]

Now replacing:

\((5+0.015)*0 = -(5*v_{2})+(0.015*600)\\9 = (5*v_{2})\\v_{2}=1.8 [m/s]\)

Momentum is the product of mass and velocity. The recoil velocity of the rifle weighing 5 kg is 1.8 m/s.

According to the law of conservation of momentum if two objects are in contact with each other then for that system of the two objects the momentum of the object before will be equal to the momentum of the object after the collision.

GIven to us

Mass of the rifle, M = 5 kg

Mass of the bullet, m = 15 g = 0.015 kg

Velocity of the bullet afterwards, v₂ = 600 m/s

We know that according to the law of conservation of momentum, the momentum of the bullet and riffle before shooting will be equal to the momentum of the bullet and riffle after shooting.

\(Mu_1 + mu_1 = Mv_1 + mv_2\)

Since, before shooting the bullet was in the riffle and the velocity of both was 0,

\(M(0) + m(0) = Mv_1 + mv_2\\\\-Mv_1 = mv_2\\\\v_1 = -\dfrac{m \times v_2}{M}\)

Substitute the values,

\(v_1 = -\dfrac{0.015 \times 600}{5}\\\\v_1 = -1.8\rm\ m/s\)

Thus, the recoil of the rifle is -1.8 m/s, the negative sign denotes that the velocity of recoil was in opposite direction to the bullet.

Hence, the recoil velocity of the rifle weighing 5 kg is 1.8 m/s.

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Answer:

The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces, taking into account the fact that a force is a vector and two forces of equal magnitude and opposite direction will cancel each other out.

Note:

Please mark as Brainliest, or i'll go to your house and kidnapp your family, lol

(it's a joke btw)

Answer:The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces, taking into account the fact that a force is a vector and two forces of equal magnitude and opposite direction will cancel each other out.

Explanation:Formula of Net Force

FN is the force acting on a body. When the body is at rest, the net force formula is given by, FNet = Fa + Fg.

I think that's correct

Answer

0.510

Explanation:

The change in pitch of the engine noise of a car as it goes by on a straightaway can be used to estimate its speed.The car is going approximately 171.5 meters per second (or about 383 mph) on the straightaway.                                    

If the sound of a certain car drops by a full octave, which means the frequency is halved, then its speed can be calculated using the formula: speed = wavelength x frequency. Assuming the speed of sound is 343 meters per second, the wavelength of the sound produced by the car can be calculated using the difference in frequency.The speed of the car can be estimated by multiplying the wavelength by the frequency difference and then dividing by the time it takes for the car to pass by.If the car drops by a full octave, it is traveling at approximately 171.5 meters per second or 384 miles per hour.

To calculate the speed, we use the formula:

Speed = (v * (f₀ / (f₀ + fΔ))) - v

where v is the speed of sound (343 m/s), f₀ is the original frequency, and fΔ is the change in frequency (in this case, f₀ / 2). Solving for the speed, we get:

Speed = (343 * (f₀ / (1.5 * f₀))) - 343 ≈ 0.5 * 343 = 171.5 m/s

The car is going approximately 171.5 meters per second (or about 383 mph) on the straightaway.                              

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Answer:

people could just have a space heater or they are wearing warm clothes.

Explanation:

COMMON SENSE!!!!!