S A girl of mass mg is standing on a plank of mass m_{p} . Both are originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity vgp to the right relative to the plank. (The subscript g p denotes the girl relative to plank.)(a) What is the velocity vpi of the plank relative to the surface of the ice?

Answer:

solution given:

acceleration (a)=?

initial velocity (u)=3m/s

final velocity (v)=6m/s

distance (s)=90m

we have

v²=u²+2as

substituting value

6²=3²+2*a*90

36=9+180a

36-9=180a

a=25/180

a=0.1388m/s²

Answer:

The acceleration of dog is 0.15 m/s².

Step-by-step explanation:

Given :

To Find :

Using Formula :

\(\star{\underline{\boxed{\sf{\purple{{v}^{2} = {u}^{2} + 2as}}}}}\)

Solution :

Substituting all the given values in the formula to find acceleration :

\({\longrightarrow{\sf{{v}^{2} = {u}^{2} + 2as}}}\)

\({\longrightarrow{\sf{{6}^{2} = {3}^{2} + 2 \times a \times 90}}}\)

\({\longrightarrow{\sf{{6 \times 6}= {3 \times 3} + 2 a \times 90}}}\)

\({\longrightarrow{\sf{36=9 + 180a}}}\)

\({\longrightarrow{\sf{36 - 9 = 180a}}}\)

\({\longrightarrow{\sf{27 = 180a}}}\)

\({\longrightarrow{\sf{a = \dfrac{27}{180}}}}\)

\({\longrightarrow{\sf{a \approx 0.15}}}\)

\(\star{\underline{\boxed{\tt{\red{a \approx 0.15 \: m/s^{2} }}}}}\)

Hence, the acceleration of dog is 0.15 m/s².

\(\rule{300}{1.5}\)

The primary difference between speed and velocity is that speed is a scalar quantity that describes how fast an object is moving, while velocity is a vector quantity that describes how fast an object is moving in a particular direction

Speed and velocity are two critical concepts in physics. They are used to describe the motion of an object. While both describe how fast an object is moving, there are some fundamental differences between the two. Let's explore these differences.

What is speed?

Speed is a scalar quantity that describes how quickly an object moves. It is measured in meters per second (m/s) or kilometers per hour (km/h).

Speed can be calculated using the following formula:

speed = distance ÷ time

For example,

if an object covers a distance of 150 meters in 10 seconds, its speed can be calculated as follows:

Speed = distance ÷ time= 150 meters ÷ 10 seconds= 15 meters per second (m/s)

What is velocity?

Velocity, on the other hand, is a vector quantity that describes how fast an object is moving in a particular direction. It is measured in meters per second (m/s) or kilometers per hour (km/h).

Velocity can be calculated using the following formula:

velocity = displacement ÷ time

For example, if an object travels a displacement of 150 meters in 10 seconds in a specific direction, its velocity can be calculated as follows:

Velocity = displacement ÷ time= 150 meters ÷ 10 seconds= 15 meters per second (m/s) in a specific direction.

In conclusion, the primary difference between speed and velocity is that speed is a scalar quantity that describes how fast an object is moving, while velocity is a vector quantity that describes how fast an object is moving in a particular direction.

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Answer:

Sorry I'm wrong The person above is correct.

I tried.

Answer:

The net force on the brick is 0N and the brick remains at rest.

Explanation:

Net force = 5N - 5N

= 0N

Compounds with a limited solubility in water and a high vapour pressure are known as volatile organic compounds. Many VOCs are compounds created by humans and employed in the production of paints, medications, and refrigerants

Thus, VOCs are often fuel oxygenates like methyl tert-butyl ether (MTBE), industrial solvents like trichloroethylene, or byproducts of chlorination in water treatment like chloroform and solubility.

Petroleum fuels, hydraulic fluids, paint thinners, and dry cleaning products all frequently include VOCs. VOCs are typical pollutants in groundwater.

Certain solids or liquids emit volatile organic compounds (VOCs) as gases. Many different compounds are included in VOCs, some of which may have negative short- and long-term health impacts.

Thus, Compounds with a limited solubility in water and a high vapour pressure are known as volatile organic compounds. Many VOCs are compounds created by humans and employed in the production of paints, medications, and refrigerants.

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Answer:

horse

Explanation:

we have p=m.v

cheetah: p1=50.80=4000

horse: p2=500.80=40000

elephant: p3=5000.0=0

The 500 kg horse also running at 80 km/h  would have more momentum than others'.

The sum of a particle's mass and velocity is called momentum. Being a vector quantity, momentum possesses both magnitude and direction. According to Isaac Newton's second equation of motion, the force acting on the particle equals the time rate of change of momentum.

According to the question:

Momentum of 50 kg cheetah running at 80 km/h is = 50×80 kg.km/h

= 400 kg.km/h .

Momentum of a 500 kg horse running at 80 km/h is =  500×80 kg.km/h

= 4000 kg.km/h .

Momentum of a  5000 kg elephant at rest =  50×0 kg.km/h

= 0 kg.km/h .

Hence, The horse would have more momentum.

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We aim to prove that the functions f(x) and x*f(x) are linearly independent for any non-constant function f(x). Linear independence means that no non-trivial linear combination of the two functions can result in the zero function.

By assuming the existence of constants a and b, we will demonstrate that the only solution to the equation a*f(x) + b*(x*f(x)) = 0 is a = b = 0. To begin, let's consider the linear combination a*f(x) + b*(x*f(x)) = 0, where a and b are constants. We want to show that the only solution to this equation is a = b = 0.

Expanding the expression, we have a*f(x) + b*(x*f(x)) = (a + b*x)*f(x) = 0. Since f(x) is a non-constant function, there exists at least one value of x (let's call it x0) for which f(x0) ≠ 0.Plugging in x = x0, we obtain (a + b*x0)*f(x0) = 0. Since f(x0) ≠ 0, we can divide both sides of the equation by f(x0), resulting in a + b*x0 = 0.

Now, notice that this linear equation holds for all x, not just x0. Therefore, a + b*x = 0 is true for all x. Since the equation is linear, it must hold for at least two distinct values of x. Let's consider x1 ≠ x0. Plugging in x = x1, we have a + b*x1 = 0.Subtracting the equation a + b*x0 = 0 from the equation a + b*x1 = 0, we get b*(x1 - x0) = 0. Since x1 ≠ x0, we have (x1 - x0) ≠ 0. Therefore, b must be equal to 0.

With b = 0, we can substitute it back into the equation a + b*x0 = 0, giving us a + 0*x0 = 0. This simplifies to a = 0. Hence, we have shown that the only solution to the equation a*f(x) + b*(x*f(x)) = 0 is a = b = 0. Therefore, the functions f(x) and x*f(x) are linearly independent for any non-constant function f(x).In conclusion, the functions f(x) and x*f(x) are linearly independent because their only possible linear combination resulting in the zero function is when both the coefficients a and b are equal to zero.

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Today, astronomers can measure distances directly to worlds like Venus, mars, the moon, or the satellites of Jupiter by bouncing radar beams off them.

The reproduction and display of 3D pictures is another use for parallax. The secret is to take two 2D pictures of the subject from slightly different angles, just like human eyes do, and to show them so that each eye only sees one of the pictures.

For instance, a stereopticon, or stereoscope, a popular gadget from the 19th century, employs parallax to display images in three dimensions. Through a set of lenses, two photographs that have been put next to one another are seen. Each image is captured from a slightly varied angle that nearly resembles the distance between the eyes. The images on the left and right respectively depict what the left and right eyes would see.

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Answer:

gamma rays

Explanation:

Around 9.588 g of bromine will be produced when 50.0 ml of 1.20 mol/L potassium bromide solution reacts with 50.0 ml of a 1.20 mol/L solution of acidified NaClO.

The reaction between potassium bromide (KBr) and sodium hypochlorite (NaClO) in the presence of acid is a redox reaction, which results in the formation of bromine (Br2) and sodium chloride (NaCl). The amount of bromine produced can be calculated using the stoichiometry of the reaction.

First, the number of moles of potassium bromide (KBr) can be calculated using the molarity and volume of the KBr solution:

Moles of KBr = Molarity x volume

= 1.20 mol/L x (50.0 ml / 1000 ml/L)

= 0.0600 mol

Since the reaction is 1:1 between KBr and NaClO, the same number of moles of bromine will be produced. The mass of bromine can be calculated using the moles and molar mass of bromine:

Mass of Br2 = Moles of Br2 x Molar mass of Br2

= 0.0600 mol x 159.80 g/mol

= 9.588 g

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Applying Newton's Second Law of Motion, the acceleration of the ball is 16.8 \(m/s^2\)

Given the following data:

To find ball's acceleration, we would apply Newton's Second Law of Motion:

First of all, we would determine the net force acting on the ball.

\(Net \; force = Upward\;force + Downward\;force\)

\(Downward\;force = 0.5\) × \(9.8\)

Downward force =  4.9 N

\(Net \; force = 3.5 + 4.9\)

Net force = 8.4 N

Mathematically, Newton's Second Law of Motion is given by this formula;

\(Acceleration = \frac{Net\;force}{Mass}\\\\Acceleration = \frac{8.4}{0.5}\)

Acceleration = 16.8 \(m/s^2\)

Therefore, the acceleration of the ball is 16.8 \(m/s^2\)

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Here, the closest option from the given choices is 0.84.

To find the coefficient of static friction (μ) between the car and the road, we can use the centripetal force equation:

F = m * v^2 / r

where:

F is the centripetal force,

m is the mass of the car,

v is the velocity of the car, and

r is the radius of the curve.

In this case, the centripetal force is provided by the static friction between the car's tires and the road. So we have:

F = μ * m * g

where:

μ is the coefficient of static friction,

m is the mass of the car, and

g is the acceleration due to gravity (approximately 9.8 m/s^2).

Setting the two equations equal to each other, we have:

μ * m * g = m * v^2 / r

Simplifying, we can cancel out the mass (m) from both sides:

μ * g = v^2 / r

Now, let's plug in the given values:

m = 2000 kg (mass of the car)

v = 50.0 m/s (velocity of the car)

r = 300 m (radius of the curve)

g = 9.8 m/s^2 (acceleration due to gravity)

Substituting these values into the equation, we get:

μ * 9.8 = (50.0)^2 / 300

Solving for μ:

μ = (50.0)^2 / (300 * 9.8)

μ ≈ 0.8367

Rounding to the nearest hundredth, the coefficient of static friction (μ) between the car and the road is approximately 0.84.

Therefore, the closest option from the given choices is 0.84.

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Answer:b

Explanation:

im in fifth grade so i guessd. gl tho heh.

The answer will be an option C. The momentum would be eliminated for the running back.

The collision in which the object bounces off after the collision is called the elastic collision. The one condition is given in the question that after the collision the running back bounces back and the linebacker stops

A linebacker runs at 3 m/s and collides with a running back running toward him at 3.2m/s. If the running back bounces back and the linebacker stops it means that the collision is elastic. And all the momentum is transferred to the other person.

Therefore the answer will be an option C. The momentum would be eliminated for the running back.

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The wave which has the longest frequency if, listed from smallest to largest are gamma ray, x-rays, ultraviolet, visible, infrared, microwave, and radio is radio waves and gamma rays have the highest frequency.

The oscillations between an electric field and a magnetic field produce waves known as electromagnetic waves or EM waves. In other words, magnetic and electric fields oscillate to form electromagnetic (EM) waves.

The term "electromagnetic spectrum" (EMS) refers to the entire range of electromagnetic radiation that is now understood. Wavelengths rise from roughly 10⁻¹⁸ m to 100 km, and frequencies fall from 3 × 10²⁶ Hz to 3 × 10³ Hz in this range.

The following list of the seven electromagnetic waves is organized by decreasing wavelength and increasing frequency and energy: X-rays, gamma rays, UV rays, visible light, radio waves, microwaves, and infrared waves.

Thus, radio waves have the longest frequency and gamma rays have the highest frequency.

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The amount of charge given that the energy transferred is 5.25 kilojoules and the voltage is 15 volts will be 0.35 coulombs.

Charge is a property of matter that describes the amount of electrical energy in a substance. It can be positive or negative, and it is measured in units called coulombs. Objects with the same charge will repel each other, while objects with different charges will attract each other. This is the basis of Coulomb's Law and for how electricity works.

The charge, measured in coulombs (C), can be calculated by using the formula:

charge = energy transferred / voltage

charge = 5.25 kJ / 15 V

charge =  0.35 C

Therefore the charge will be 0.35 coulombs.

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Answer:

Earth spins like top because The earth is rotating around an rotational axis which is tilted 23 degrees with respect to earth's

orbit . where as Uranus rotation is very different from earth.It rotates on its sides

Answer:

muscular force in relative to this

Answer:

The force exerted by one source object on another target object always creates another force at the target object that pushes back on the source object with the same ... or His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.

Answer:

Zodiac signs

Explanation:

Answer:

At 23.5 deg north of the equator this person would see the sun directly overhead at the summer solstice at noon

Answer:

The thermal energy absorbed is 66.98 kJ.

Explanation:

The thermal energy absorbed can be found by using the following equation:

\( Q = mC\Delta T \)

Where:

Q: is the thermal energy =?

m: is the mass of water = 2.00x10² g

ΔT = T₂ - T₁ = 140 °C - 60 °C = 80 °C

C: is the specific heat of water = 4.186 J/(°C*g)

Hence, the thermal energy absorbed is:  

\(Q = mC\Delta T = 2.00 \cdot 10^{2} g*4.186 \frac{J}{^{\circ} C*g}*80 ^{\circ} C = 66976 J = 66.98 kJ\)

Therefore, the thermal energy absorbed is 66.98 kJ.

I hope it helps you!    

The thermal energy absorbed will be 66.98 kJ.heat loss is inverse to heat gain.

Heat gain is defined as the amount of heat required to increase the temperature of a substance by some degree of Celcius.

Given data;

Q(thermal energy) =?

m(mass of water) = 2.00x10² g

C(specific heat of water) = 4.186 J/(°C*g)

ΔT = T₂ - T₁

ΔT = 140 °C - 60 °C

ΔT = 80 °C

It is given by the formula as ;

\(\rm Q= mcdt \\\\ Q= 2.00x10^2 \times 4.186 \times 80 \\\\ Q=66.98 \ kJ.\)

Hence, the thermal energy absorbed will be 66.98 kJ.

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ANSWER:

C. reflected ray

STEP-BY-STEP EXPLANATION:

The line that divides the angle between the incident ray and the reflected ray into two equal angles is known as the normal line.

Therefore, the angle between the reflected ray and the normal is known as the angle of reflection.

Therefore, the correct answer is C. reflected ray

Campaigning for perplexing that one of the world's largest fast food chains is still trailing behind, with no vegetarian or vegan burgers.

What is campaign ?
A campaign is any series of actions or events designed to achieve a specific result, such as a television commercial and Internet ad campaign attempting to persuade children to buy bubble gum-flavored toothpaste.

The noun campaign refers to any group of actions carried out with a specific goal in mind. A political campaign's purpose is to elect a candidate to office. A military campaign's purpose may be to gain control of a city, as in General Sherman's Civil War campaign to conquer Atlanta. Campaign may also be used as a verb, such as when an environmental organisation asks people to sign petitions and contact their representatives in Congress to prevent a developer from establishing a shopping mall.

In recent years, the terrible impact of animal husbandry has taken centre stage, and we're becoming more aware of the impact our meat consumption has on the environment, our health, and animals. Which makes it even more perplexing that one of the world's largest fast food chains is still trailing behind, with no vegetarian or vegan burgers.

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It moved from 3 cm to 6 cm with constant speed of 3 cm/s.This statement correctly describes the motion of the object.

An object is said to be in motion , when its position changes with respect to its surroundings area and time.

Object's moves from 3 cm to 10 cm with a constant speed of 2 cm/s

let us check

time = 7 sec

distance = 10 - 3 = 7 seconds

speed = distance / time = 7/7 = 1 m/s

incorrect option

Object's moves from 0 cm to 6 cm with an average speed of 1 cm/s.

distance = 6 cm

time = 7.5 sec

speed = 6/7.5 = 0.8 m/s

incorrect option

Object's moves from 0 cm to 10 cm at an average speed of 2 cm/s.

distance = 10 cm

time = 9 sec

speed = 10 / 9 = 1.11 m/s

incorrect option

Object's moves from 3 cm to 6 cm at a constant speed of 3 cm/s.

distance = 6-3 = 3 cm

time = 7.5 - 6.5 = 1 sec

speed = 3 /1 = 3 m/s

correct option D. object moved from 3 cm to 6 cm with a constant speed of 3 cm/s.

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the answer is c because it has the most volts

a

Today, we rely largely on the technique of radar ranging to precisely measure distances in the solar system.

Radar ranging involves sending out a radar signal from Earth to a nearby planet or moon, and then measuring the time it takes for the signal to bounce back to Earth.

By knowing the speed of light, we can use this time measurement to calculate the distance to the object.

This technique is particularly useful for measuring distances to objects that are too far away to be measured using other methods, such as parallax. Radar ranging has been used to accurately measure the distances to planets, moons, asteroids, and even some nearby stars.

It has revolutionized our understanding of the solar system and has enabled us to explore it in greater detail.

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The energy required to accelerate a particle to speeds of 0.5c, 0.9c, and 0.99c can be calculated as 1.15E₀, 2.29E₀, and 7.08E₀, respectively, where E₀ represents the rest energy of the particle.

Einstein's mass-energy equivalence states that the total energy (E) of an object is equal to its mass (m) multiplied by the speed of light (c) squared, E = mc². To calculate the energy required to accelerate a particle to a specific speed, we need to consider the relativistic effects.

To express the energy in terms of the rest energy (E₀), we divide the total energy (E) by mc², resulting in E/E₀. Thus, for speeds of 0.5c, 0.9c, and 0.99c, we can calculate the energy required as follows:

a) For a speed of 0.5c:

  E/E₀ = (mc²)/(mc²) = 1E₀

  The energy required is equal to the rest energy.

b) For a speed of 0.9c:

  E/E₀ = γmc²/mc² = γ = 1/(1 - v²/c²)^(1/2)

  Here, v = 0.9c, so γ = 2.29

  The energy required is 2.29E₀.

c) For a speed of 0.99c:

  E/E₀ = γmc²/mc² = γ = 1/(1 - v²/c²)^(1/2)

  Here, v = 0.99c, so γ = 7.08

  The energy required is 7.08E₀.

Therefore, the energy required to accelerate a particle to speeds of 0.5c, 0.9c, and 0.99c is 1.15E₀, 2.29E₀, and 7.08E₀, respectively, where E₀ represents the rest energy of the particle.

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Both magnitude and direction. Centripetal acceleration always act towards the center of the circle and have constant value.

"When a body moves in a circular path the acceleration acting towards the center of the circle is called centripetal acceleration." Hence the magnitude and direction will not change.

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