Sam runs a 100 m race in 16 seconds. Calculate how fast he was running in m/s.

The code snippet provided appears to be incomplete and may not fully achieve the desired functionality of swapping the first half and second half of a vector, except for the middle element.
The provided code appears to create a temporary variable "temp" and then attempts to swap elements of the vector "v" using the variables "vat" and "i". However, the code is incomplete and it is unclear how it would be integrated into a larger function to achieve the desired functionality.

To fully describe how to swap the first half and second half of a vector, except for the middle element, one possible approach would be to:

1. Find the index of the middle element using the formula: middle_index = (vector_size - 1) / 2

2. Iterate through the first half of the vector (up to but not including the middle element) and swap each element with its corresponding element in the second half of the vector (starting from the middle element + 1 and going to the end of the vector)

3. The middle element remains unchanged

Here is an example implementation of the described approach:

void swap_first_and_second_half(vector& v) {
 int middle_index = (v.size() - 1) / 2;

 for (int i = 0; i < middle_index; i++) {
   int temp = v[i];
   v[i] = v[middle_index + i + 1];
   v[middle_index + i + 1] = temp;
 }
}

This function takes a reference to a vector of integers and swaps the first half and second half of the vector, except for the middle element.

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Answer:

The answer to your question is 2

The weight we experience on our planet is the product of our mass and acceleration due to gravity. This is the force by our own weight. if an object of 15 kg mass weighs 60 on planet X, acceleration due to gravity on planet X  will be  4 m/s².

Gravitational force is an attractive force by which an object attracts other objects into its center of mass. We are all standing on the surface of earth due to the gravitational pull of earth.

Gravitational force is directly proportional to the mass of the object and inversely proportional to the distance from the ground. Acceleration due to gravity is the acceleration of a moving body against the gravitational filed.

Given that the mass of the object is 15 Kg and the gravitational force or weight is 60 N. Then the acceleration due to gravity a is the ratio of its weight to the mass.

a = w/m

  = 60 N/ 15 Kg

  = 4 m/s².

Therefore, the acceleration due to gravity of the planet x is 4 m/s².

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Solution:

The rate constant for this reaction is 2.22×10⁻⁴ M⁻¹s⁻¹

Explanation:

The rate constant for a second-order reaction can be calculated using the integrated rate law equation for a second-order reaction:

1/[A] = kt + 1/[A]₀

Where:
[A] is the concentration of the reactant at time t
[A]₀ is the initial concentration of the reactant
k is the rate constant
t is the time

Using the given values, we can set up two equations:
1/0.270 M = k(255 s) + 1/[A]₀
1/9.00×10−2 M = k(755 s) + 1/[A]₀

Subtracting the first equation from the second equation gives us:
1/9.00×10−2 M - 1/0.270 M = k(755 s - 255 s)

Solving for k gives us:
k = (1/9.00×10−2 M - 1/0.270 M) / (755 s - 255 s)
k = 2.22×10⁻⁴ M⁻¹s⁻¹

Therefore, the rate constant for this reaction is 2.22×10⁻⁴ M⁻¹s⁻¹.

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Answer:

it's (A) weight I think

Answer:

A. Weight

Explanation: Weight is defined as the amount of force placed on an object from gravity which means it is directly reliant on the force of gravity while the other choices are not. Neither Mass, volume, or velocity is impacted by gravity as much as weight, velocity is the direction of speed, mass is the resistance that a body of matter offers to a change in its speed or position upon the application of a force, and volume is the amount of space an object takes. As you can see none of these componant have gravity as a determining factor other than weight since weight is determined by the gravity which is why the weight of an object can vary if your on earth or on the moon since the gravity is different.

Answer:

Explanation:

First part of the journey;

If the car starts from rest, then accelerates at 1.20 m/s^2 for 7.00 s, the total time taken during this period is 7.0s.

But then  lets get the velocity v of the car during its first part of the journey.

Using the formula v1 = u1+ at1

v = 0+1.2(7)

v = 8.4m/s

Second part of the journey is when the driver hits the brake and slowing to stop at a rate of -4.25 m/s^2. To calculate the time it takes by the body to decelerates, we will use the equation of motion v2 = u2 + at2

v = final velocity of the car during the second part of the journey

u = initial velocity of the car during the second part of the journey

a = deceleration

t = time taken

Given v2 = 0m/s, u2 = 8.4m/s, a = -4.25m/s²

0 = 8.4-4.25t2

4.25t2 = 8.4

t2 = 8.4/4.25

t2 = 1.98secs

Total time taken for the journey = t1+t2

= 7.0s + 1.98s

= 8.98secs

The most effective way for the teacher to informally assess the class's ability to differentiate between longitudinal and transverse wave behavior would be to use a hands-on activity where students create and observe both types of waves.

For example, the teacher could provide slinkies and have students create longitudinal waves by stretching and compressing the slinky, and transverse waves by shaking the slinky side to side. The teacher could then ask students to identify which type of wave behavior they observed.

This type of activity engages students in a kinesthetic learning experience that allows them to physically create and observe both types of waves, making it easier for them to differentiate between the two.

Additionally, this type of informal assessment allows the teacher to observe individual student understanding and provide immediate feedback.

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Table c correctly identifies the SI units for length, mass, volume, and temperature.

Volume is a three-dimensional measurement that's used to gauge a solid shape's capacity. It implies that the volume of a closed form determines how much space it may occupy in three dimensions.

Mass is conservative in nature. The law of conservation of mass states that the overall mass of substances that remarkably take part in a chemical reaction is conserved during the reaction. It is neither created nor destroyed in a chemical reaction.

SI unit of mass Kilogram. SI unit of temperature is in Kelvin. SI unit of length is meter.

Table c correctly identifies the SI units for length, mass, volume, and temperature.

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To determine which choice is better, we need to calculate the present value (PV) of the costs associated with each lightbulb.

Let's start with the incandescent bulb. The cost of the bulb is $0.50, and it lasts for three years. Each year, it uses $0.75 of electricity. The discount rate is 12%.

To calculate the present value of the electricity cost for each year, we can use the formula

PV = C / (1 + r)^t,

where C is the cost, r is the discount rate, and t is the number of years. Plugging in the values, we have:

PV = $0.75 / (1 + 0.12)^1 + $0.75 / (1 + 0.12)^2 + $0.75 / (1 + 0.12)^3

Calculating this gives us a present value of $1.89 for the electricity cost.

Next, let's calculate the present value of the LED bulb. The cost of the bulb is $4, and it lasts for eleven years. Each year, it uses $0.20 of electricity.

Using the same formula as before, we can calculate the present value of the electricity cost for each year:

PV = $0.20 / (1 + 0.12)^1 + $0.20 / (1 + 0.12)^2 + ... + $0.20 / (1 + 0.12)^11

Calculating this gives us a present value of $1.18 for the electricity cost.

Now, we can compare the present values of the costs for each lightbulb. The incandescent bulb has a present value of $1.89, while the LED bulb has a present value of $1.18.

Since the present value of the LED bulb is lower, it is the better choice. The LED bulb is more cost-effective in the long run, even though it has a higher upfront cost. It lasts longer and uses less electricity, resulting in lower overall costs.

In conclusion, the LED lightbulb is the better choice based on the calculations of present value. It offers long-term savings due to its longer lifespan and lower electricity usage.

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The daughter nucleus of tritium is a helium nucleus with two protons and two neutrons.

It is an isotope of hydrogen. During decay, Tritium nucleus emits an electron and an antineutrino, and changes it from a Tritium with one proton and two neutrons, to a Helium nucleus with two protons and one neutron.

Helium is an inert gas.

Nucleus is positively charged mass at the centre of the atom consisting of positively charged protons and neutral neutrons.

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Answer:

Acceleration (b) not sure tho

Explanation:

The hanging mass will be 0.101 kg.

The formula for calculating the mass of a hanging wire is given as;

m = (π/4) * [(ρL² /Y) * ΔL + L * Δρ]

where; m is the mass of the hanging weight,

            ρ is the density of the wire,

            L is the length of the wire,

            Y is Young's modulus of the wire,

           ΔL is the extension of the wire and

         Δρ is the change in the density of the wire.

In this case,

ρ = 7.86 x 10³ kg/m³L

  = 2.9 mD

  = 0.48 mm

  = 0.48 x 10⁻³ m

  = 4.8 x 10⁻⁴ mY

  = 2.0 x 10¹¹ N/m²ΔL

  = 1.4 x 10⁻³ m

Let US calculate the mass of the wire;

A = (π/4) * D²A

    = (π/4) * (4.8 x 10⁻⁴)²A

    = 1.80955737 x 10⁻⁷ m²ρL

    = 7.86 x 10³ kg/m³ * 2.9m

    = 22.794 kg Y

   = 2.0 x 10¹¹ N/m²m_wire

   = ρLA / Lm_wire

   = 7.86 x 10³ kg/m³ * 1.80955737 x 10⁻⁷ m² / 2.9m

  = 4.9091761 x 10⁻⁴ kg

Let's calculate the mass of the hanging weight using the mass formula.

m = (π/4) * [(ρL² /Y) * ΔL + L * Δρ]

m = (π/4) * [(7.86 x 10³ * 2.9² / 2.0 x 10¹¹) * 1.4 x 10⁻³ + 2.9 * 4.8 x 10⁻⁴]

m = 0.100615775 kg

Therefore, the hanging mass will be 0.101 kg.

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The force of friction between the losing player’s feet and the grass is 692 N.

The force of friction between the losing player’s feet and the grass is calculated by applying Newton's second law of motion as shown below.

F(net) = ma

where;

F - Ff = ma

where;

800 - Ff = 90 x 1.2

800 - Ff = 108

Ff = 800 - 108

Ff = 692 N

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The availability of suitable nesting sites is one of the most important limiting factors for the purple martin bird population.  Building more birdhouses can help address this limiting factor and increase the size of the purple martin population in the area.

There are several limiting factors that can decrease purple martin populations, but one of the most important is the availability of suitable nesting sites. Purple martins are cavity-nesting birds, which means they require hollow spaces, such as tree cavities or specially designed birdhouses, to build their nests and raise their young. In areas where suitable nesting sites are scarce, the population of purple martins may be limited by the number of available nesting sites.

Therefore, by building more birdhouses, Latrice is addressing this limiting factor and helping to increase the size of the purple martin population in her area. Other limiting factors for purple martins may include the availability of food, the quality of habitat, and the presence of predators.

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Answer:

mark me as the brainliest plss

The rolling ball travels approximately 0.9π meters in 3 seconds, using basic understanding of circumference, distance and number of revolutions.

To determine how far the rolling ball travels in 3 seconds, we need to calculate the linear distance covered by a point on the circumference of the ball during that time.

The linear distance traveled by a point on the circumference of a rolling object is given by the formula:

Distance = Circumference × Number of revolutions

The circumference of a circle is calculated using the formula:

Circumference = 2π × radius

Given that the radius of the ball is 0.05 m, we can substitute this value into the circumference formula:

Circumference = 2π × 0.05 = 0.1π m

Now, we need to determine the number of revolutions the ball makes in 3 seconds. The number of revolutions can be calculated by multiplying the angular velocity (given as 3 rad/s) by the time (3 s):

Number of revolutions = Angular velocity × Time = 3 rad/s × 3 s = 9 revolutions

Substituting the values into the distance formula:

Distance = Circumference × Number of revolutions

Distance = 0.1π m × 9

Distance ≈ 0.9π m

Therefore, the rolling ball travels approximately 0.9π meters in 3 seconds.

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The average no-load voltage in a DC arc welding circuit is typically in the range of 60-80 volts.

Arc welding is a welding technique that uses an electric arc to melt the base metal and fusing it with the filler metal to create a weld. The welding machine supplies an electric current to a consumable electrode or filler wire to melt the metals, forming a weld pool. The two metals fuse when the weld cools down. The weld is as strong as the base metal and can be used to construct everything from automobile components to skyscrapers.

In a welding circuit, the no-load voltage is the voltage between the welding electrode and the workpiece before a welding arc is struck. Before the start of a welding operation, the circuit is energized and, as a result, the welding machine produces an open circuit voltage. It is also known as the no-load voltage, which is the voltage measured at the output terminals of the welding machine when the welding arc is inactive and the electrode is not in contact with the workpiece.

The average no-load voltage in a DC arc welding circuit is typically around 60-80 volts. This voltage range is necessary to establish and maintain an electric arc between the welding electrode and the workpiece, enabling the welding process to occur efficiently.

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The kinetic energy of a car with a mass of 1050kg and a velocity of 5m/s will be 13,125 joules or 13,125 kg⋅m2⋅s−2.

As we know, the formula to find the kinetic energy in a system is \(1/2 m v^{2}\) where m is the mass of the system and v is the given velocity at the moment. So , by putting the given data in the equation, we get :

⇒\(1/2mv^{2}\)

⇒1/2 x 1050 x 5 x 5

⇒525 x 25

⇒13,125

∴ The Kinetic energy of the car will be 13,125 Joules where joule is the SI unit of energy.

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Answer:

The forces are balanced

Explanation:

For an object to be unbalanced, each force has to be in the opposite direction of another force and have equal strength.

Taking a look at this photo:

The forces are balanced because the left and right side both have forces acting in the opposite direction and will equal strength, 25 Newtons.

The same is said about the top and bottom of the rectangle, but the equal strength is 10 Newtons.

Answer:

use the gas law equations

Answer:

a hypothesis is a explanation made on the basis of limited evidence

Explanation:

Answer:

an hypothesis is an educated guess  based on what you already know

Explanation:

hope this helps

The false statement is B) Homolytic bond cleavage yields neutral radicals in which each atom gains one electron.

In homolytic bond cleavage, each atom retains one electron from the shared pair of electrons, resulting in the formation of two neutral radicals, where each atom retains its original number of electrons.

No atoms gain or lose electrons in this process.

In a homolytic bond cleavage, a covalent bond is broken, and the shared pair of electrons is split equally between the two atoms involved in the bond.

This results in the formation of two neutral radicals, with each atom retaining one of the electrons from the shared pair.

A radical is a chemical species characterized by the presence of an electron that is unpaired, meaning it does not have a partner electron with which it forms a complete pair. When a covalent bond is homolytically cleaved, each atom involved in the bond gains one electron, resulting in the formation of two radicals.

These radicals are highly reactive due to the presence of the unpaired electron, which makes them prone to participate in further chemical reactions.

It's important to note that in homolytic bond cleavage, there is no transfer of electrons from one atom to another.

Instead, the bond is broken in a way that allows each atom to retain one of the electrons, leading to the formation of two neutral radicals.

Therefore, statement B, which suggests that each atom gains one electron, is false.

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Apparent expansion: If you heat the liquid directly using a container, the expansion you see is called a apparent expansion of the liquid. The apparent expansion of the liquid is the expansion of the liquid that is perceived by taking into account the expansion of the container. Its SI unit is “per kelvin”.

Apparent Expansivity is a term used in thermodynamics to describe a substance's volume change when it undergoes a change in temperature or pressure. More specifically, it refers to the change in volume per unit volume per unit change in temperature or pressure, depending on the system being analyzed.

If a substance expands by a certain amount when heated or compressed, the apparent expansivity would be the ratio of the change in volume to the change in temperature or pressure. The units of apparent expansivity are usually expressed in inverse degrees Celsius or inverse Pascals, depending on the system.

Apparent expansivity can be crucial in various fields of study, including materials science, geology, and engineering, as it can affect the behavior and properties of materials under different conditions.

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Answer:

A) earth

B) live

C) live

D) earth

Explanation:

hope i help

Answer:

Less than 50N

Explanation:

Given that a pair of wires holding a hanging light that weighs 50N.

Since the hanging weight is equal to 50 N, the sum of the tension in the wires will also experience the same magnitude of force acting on the weight.

Considering each of the wire, the tension on each of the wire will surely be less than 50N

Therefore, the tension in each wire is less than 50N

Answer:

Kinetic energy.

Explanation:

Answer: Kinetic energy is the energy an object has because of its motion

(if it needs to be a one worded answer than just type motion)

The potential energy of an object depends on its mass and its height.

The law of conservation of energy states that energy can be neither created nor destroyed, but it can change its form.

Answer:Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force. Applying a force requires us to do work.

As expressed by the equation, potential energy depends upon the mass and the height of the object. Any increase in these two quantities will lead to an increase in the amount of potential energy possessed by the object.

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside.