A toy car pushed across the floor is observed to slow down and stop based on Newton’s first law of motion what is the best conclusion

A : an object in motion eventually stops
B. The car must have been going slightly uphill
C. The car did not have enough mass to keep going
D. There must have been an unbalanced force acting on the toy car

The mass of the egg = 0.23 kg

The force, F = 16 N

The acceleration, a = 68.6 m/s²

The relationship between the force (F), acceleration (a), and mass (m) is:

F = ma

Substitute F = 16, a = 68.6, and solve for m

16 = 68.6m

m = 16/68.6

m = 0.23 kg

It is because the effort distance is greater than the load distance

Explanation:

As we know, Effort×effort distance = load × load distance

So when effort distance is increases,

The effort decreases

So when the spanner’s handle is long

A tight knot can easily be opened by less effrot

I hope it helped

Answer: Don't worry I'm here to save u the answer is lithosphere (D) :D

Explanation: I have once done this question and got it right!

The main difference between Kinetic energy and Potential energy is that kinetic energy refers to movement while potential energy refers to storage.

Kinetic energy is a type of energy in motion or energy in movement such as a turbine (mechanical energy), while Potential energy refers to the energy that is stored to be used when required (e.g. chemical bonds of foods).

Therefore, with this data, we can see that  Kinetic energy is used as movement, while Potential energy is stored to be used in the future.

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Answer:

1.3 Pa

Explanation:

from general gas equation

p1v1/TO =P2V2/T2

Answer:

Plants and animals that live in a biome must be able to live and reproduce in the conditions

Explanation:

Explanation:

if g is 10ms^-1

answers are

1-10

2-20

3-30

4-40

5-50ms^-1

RS is a composition of rotation and reflection in the Euclidean plane E². The precise description of RS depends on the specific properties of the rotation R and reflection S.

In general, if R and S have the same axis or line of symmetry, the composition RS results in a translation. If R and S have intersecting lines of symmetry, RS yields a glide reflection. If R and S have perpendicular lines of symmetry, RS produces a rotation.

It is important to consider special cases, such as parallel lines of symmetry, coinciding axes, or perpendicular lines of reflection, as they may lead to different outcomes. The classification of isometries in E² involves understanding how rotations and reflections combine to create different transformations in the plane.

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Assuming that the surface of the lake is flat and horizontal, we can use Snell's law to relate the angle of incidence of the sunlight in air to the angle of refraction in water:

\(n_air sin(θ_air) = n_water sin(θ_water)\)

where n_air and n_water are the refractive indices of air and water, respectively, and θ_air and θ_water are the angles of incidence and refraction, respectively, with respect to the normal to the surface of the lake.

Since the angle of refraction in water is 90 degrees (the light is entering along the surface of the water), we have:

\(n_air sin(θ_air) = n_water sin(90°) = n_water\)

The refractive index of air is very close to 1, while the refractive index of water is about 1.33. Substituting these values and solving for θ_air, we get:

\(sin(θ_air) = n_water/n_air = 1.33/1\\θ_air = sin^(-1)(1.33/1) = 53.11°\)

Therefore, the angle that the sun's rays in air make with the vertical is approximately 53.11 degrees.

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The correct answer is D) Before the mechanic left, the molecules were moving in place. When she returned, they were moving around each other. The change in phase from solid to liquid is due to a change in the motion of molecules.

Molecules are formed when two or more atoms come together and form a chemical bond. Molecules exist in all forms of matter and are the building blocks of all living organisms. Molecules can range in size from the very small, such as hydrogen, to the very large, such as proteins. Generally, molecules are composed of two or more atoms of the same element or different elements that are held together by chemical bonds. Molecules can also be composed of multiple subatomic particles, such as protons and neutrons, which form the nucleus of an atom. Molecules may also contain electrons, which are held in orbit around the nucleus by electrostatic forces. Molecules can have different shapes depending on the arrangement of their constituent atoms. Molecules are essential to all forms of life, as they are responsible for many of the physical and chemical processes that take place in living organisms.

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Answer:

greater than

Explanation:

thats my answer

Answer: Different types of fuels have varying compositions and release different amounts of pollutants when burned. Here are some common types of fuels and the pollutants associated with them:

Fossil Fuels:

a. Coal: When burned, coal releases pollutants such as carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen oxides (NOx), and particulate matter (PM).

b. Petroleum (Oil): Burning petroleum-based fuels like gasoline and diesel produces CO2, SO2, NOx, volatile organic compounds (VOCs), and PM.

Natural Gas:

Natural gas, which primarily consists of methane (CH4), is considered a cleaner-burning fuel compared to coal and oil. It releases lower amounts of CO2, SO2, NOx, VOCs, and PM.

Biofuels:

Biofuels are derived from renewable sources such as plants and agricultural waste. Their environmental impact depends on the specific type of biofuel. For example:

a. Ethanol: Produced from crops like corn or sugarcane, burning ethanol emits CO2 but generally releases fewer pollutants than fossil fuels.

b. Biodiesel: Made from vegetable oils or animal fats, biodiesel produces lower levels of CO2, SO2, and PM compared to petroleum-based diesel.

Renewable Energy Sources:

Renewable energy sources like solar, wind, and hydropower do not produce pollutants during electricity generation. However, the manufacturing, installation, and maintenance of renewable energy infrastructure can have environmental impacts.

It's important to note that the environmental impact of a fuel also depends on factors such as combustion technology, fuel efficiency, and emission control measures. Additionally, advancements in clean technologies and the use of emission controls can help mitigate the environmental impact of burning fuels.

Answer:

increases your heart rate

Explanation:

Warming up increases your heart rate and therefore your blood flow which enables more oxygen to reach your muscles.

The efficiency of a heat engine is the ratio of the work done by the engine to the heat input. So, if the efficiency of the heat engine is 60.0%, then 60.0% of the heat input is converted into work, and the remaining 40.0% is released into the environment.

Let's say that the heat engine takes in 100 J of heat. Then, 60.0 J of this heat is converted into work, and 40.0 J is released into the environment.

Therefore, the heat engine takes in 100 J of heat to produce 60.0 J of work.

Here is the formula for calculating the efficiency of a heat engine:

efficiency = work / heat input

In this case, the efficiency is 60.0%, the work is 60.0 J, and the heat input is 100 J. So, we can plug these values into the formula to get:

efficiency = 60.0 J / 100 J = 0.60

This means that the heat engine is 60.0% efficient.

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1012, a record is declared as follows: the first letter in the first name is stored in location 1000. Each letter takes one location and an integer takes two locations.

Multiplication and Division of Integers: the merchandise of a positive integer and a negative integer is negative: the merchandise of two positive integers is positive. The product of two negative integers is positive.

They are important because they assist to facilitate certain calculations by including integer negative numbers. In addition, they also include all negative and positive numbers without a percentage point.

The whole numbers are real numbers that don't have fractions, decimals, and negative numbers. It's neither positive integer nor negative. Zero obeys the rule of whole numbers. Positive numbers are greater than 0 and located to the proper of 0 on the variety line.

Negative numbers are but 0 and located to the left of 0 on the variety line. The quantity zero is neither positive nor negative. Zero is neither positive nor negative. It's the sole number with such characteristics.

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Answer:

1.2m/s

Explanation:

Using the law of conservation of energy

m1u1+m2u2 = (m1+m2)v

v is the common velocity after collision

Substitute the given values

3(2) + 2(0) = (3+2)v

6 + 0 = 5v

v = 6/5

v = 1.2m/s

Hence the velocity of the white ball after the collision is 1.2m/s

Answer:

1:    v = √E/ρ where E is the elasticity and ρ is the density. Newton's assumed that sound wave travel in air under isothermal condition

2:  He corrected Newton's formula by assuming that, there is no heat exchange takes place as the compression and rarefaction takes place very fast. Thus, the temperature does not remain constant and the propagation of the sound wave in air is an adiabatic process.

The toy train and the car move off together at speed of 0.4 m/s.

According to the law of momentum conservation, momentum is only modified by the action of forces as they are outlined by Newton's equations of motion; momentum is never created nor destroyed inside a problem domain.

From conservation of momentum, we get:

Total initial momentum = total final momentum

0.1 kg × 1.0 m/s + 0.15 kg × 0 m/s = ( 0.1 kg + 0.15 kg) × v

v  = (0.1/0.25) × 1.0 m/s

v = 0.4 m/s.

Hence,  they move off together at speed of 0.4 m/s.

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\({ \purple{ \tt{Here \: is \: your \: answer...}}}\)

Umm it's quiet difficult to understand. But let us note down the given values.

\({ \green{ \tt{given : - }}}\)

\({ \red{ \tt{ λ = 5000 \times {10}^{ - 10} m}}}\)

\({ \red{ \tt{ λ = 5 \times {10}^{ - 7}m}}} \)

\({ \red{ \tt{ \beta = 0.6cm = 6 \times {10}^{ - 3} m}}}\)

\({ \red{ \tt{D' = \frac{D}{2}}}}\)

\({ \red{ \tt{ \beta' = 0.003m = 3 \times {10}^{ - 3}m}}}\)

Answer:

The height or the mass

Explanation:

The one variable that can change the potential energy of a box on the floor is either the height or the mass of the box.

Potential energy is the energy due to the position of a body.

Mathematically;

  Potential energy  = mass x acceleration due to gravity x height

Therefore, if the mass of the box is changed, the potential energy changes also.

If the position of the box is changed by raising it up, the potential energy changes

The initial speed of rock is 4.25 m/s.

The state in which an object is free to move under gravity. Objects affected only by gravity are in free fall. There are two important motion properties that apply to free falling objects.

Objects in free fall experience no air resistance. All free-falling objects (on Earth) accelerate downward at a velocity of 9.8 m/s/s (often approximated as 10 m/s/s by calculations on the back cover)

For the given question,

\(y_{t}\) = \(y_{0}\) + ut - \(\frac{1}{2}\)gt²

\(y_{t}\) = height of projectile at any time, which is zero since we are calculating speed at rock bottom.

\(y_{0}\) = initial height , which is given as 61.4 m

u = initial speed

t = time of flight, which is 4 s

g = 9.8 m/s²

So, 0 = 61.4 + u × 4 - \(\frac{1}{2}\) × 9.8 × 4²

u = \(\frac{78.4 - 61.4}{4}\)

u = 4.25 m/s

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The earth behaves as a magnetic dipole. Therefore a freely suspended magnet always points towards in the north-south direction because the north pole of the suspended magnet attracts the south pole of the earth's magnet which is the geographical north pole of the earth.

hope this help!

Answer:

Because the north pole of a compass needle points towards geographical N and S poles and the compass needle points towards georaphical south.

Explanation:

Earth is a huge magnet.

Hope it was helpful....

Answer:

a

Explanation:

because if gas particles move they move with speed and that is because they are free,so when they bump into something,they bump into it with force so it converts the energy

The combination of high elevation and high latitude generally results in the coldest temperatures.

option D.

Elevation refers to the height of a location above sea level, and latitude refers to the distance of a location from the equator. In general, higher elevations are colder due to the decrease in atmospheric pressure, which leads to lower temperatures. Similarly, higher latitudes are colder because they receive less direct sunlight and are farther away from the equator.

When both high elevation and high latitude are combined, the temperature tends to be the coldest. This is because high elevation areas are often located at higher latitudes, such as in mountainous regions near the poles, where the combination of lower temperatures due to elevation and lower temperatures due to latitude results in even colder temperatures.

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Answer:B

Explanation:

The statement that summarizes the paragraph is northern hemisphere has more daylight hours.

The Earth is part of the nine planet and it comprises of the equator, northern and southern hemisphere.

It is the most suitable place for living because it have water,oxygen and other gases that support life.

Therefore, The statement that summarizes the paragraph is northern hemisphere has more daylight hours.

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Answer:

The galaxy is moving away from the viewer.

Explanation:

The ball's speed, vf in m/s, when it strikes the ground is determined as 51.44 m/s.

The final speed of the bowling ball when it hits the ground is calculated by applying the principle of conservation of energy as follows;

The potential energy of the ball at the top of the building = kinetic energy of the ball at the bottom of the building

P.E(top) = K.E(bottom)

mgh = ¹/₂mv²

where;

gh = ¹/₂v²

v² = 2gh

v = √(2gh)

v = √(2 x 9.8 x 135)

v = 51.44 m/s

Thus, the final speed of the bowling ball when it hits the ground is independent of the mass of the ball but depends on the height of fall of the ball.

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The complete question is below:

A bowling ball is dropped from the top of a building that has a height of h = 135 m. if drag produces an opposing force of 10 n while the ball's falling, what is the ball's speed, vf in m/s, when it strikes the ground? assume the ball has a mass of 5 kg.

Particle moves from point a to point b in direction of increasing electric potential, and potential difference between point a and point b is positive.

Electric force is conservative, so work done by electric force is equal to change in potential energy. We know that ΔK = 1.12×10−18 J, and since the particle is initially at rest, its initial kinetic energy is zero. 1.12×10−18 J = -ΔU or ΔU = -1.12×10−18 J

Since electric force work on particle as it moves from point a to point b, the electric potential at point b is higher than point a. Therefore, particle moves from point a to point b in direction of increasing electric potential.

ΔV = \(Vb - Va\)

ΔV = \(Vb - Va > 0\)

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The statement "A person will feel more than their normal weight whenever they are moving upward" is false. When moving upward, a person actually feels lighter.

The statement "A fast-moving person will always feel heavier than normal" is false. The perception of weight is not solely dependent on speed.

The statement "A person will feel more than their normal weight whenever they are moving upward" is false. When a person is moving upward, they actually experience a decrease in their apparent weight. This is because the force of gravity acts in the downward direction and opposes the upward motion, resulting in a reduction in the normal force exerted by the surface on the person. As a result, the person feels lighter than their normal weight.

The statement "A fast-moving person will always feel heavier than normal" is also false. The perception of weight does not depend solely on the speed of a person. The weight of an object or a person is determined by the gravitational force acting on them. Regardless of their speed, as long as they are on or near the surface of the Earth, their weight remains the same unless acted upon by additional forces.

However, it is important to note that a fast-moving person may experience additional effects such as air resistance or acceleration forces depending on the context, which can influence their perception of weight or forces acting on them. But in the absence of such factors, the speed alone does not directly affect a person's weight.

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