a small sports car and a pickup truck start coasting down a 11 m hill together, side by side. assuming no friction, what is the velocity of each vehicle at the bottom of the hill? assume that energy losses due to friction are negligible for both vehicles.

Answer:

5 seconds

Explanation:

The vertical position of the ball will be given by the equation

df = do + vo t + 1/2 a t^2        df = final position  = 0  ( on the ground

                                              do = original position  ( 25 m )

                                               vo = original velocity (+ 20 m/s)

                                                a = - 10 m/s^2

So this becomes

0 = 25 + 20 t  - 1/2 (10)t^2      

  =  - 5 t^2 +20 t + 25             Use Quadratic Formula   a = -5    b=20  c = 25

                                                      to find the positive value of t = 5 seconds

The mass M is 150 Kg

Weight is a measure of the force exerted on an object due to gravity, whereas mass is a measure of the amount of matter in an object. To convert mass to weight, you multiply the mass by the acceleration due to gravity. The formula for converting mass to weight is:

Weight = mass * acceleration due to gravity

The acceleration due to gravity is 10 m/s^2 on the surface of the Earth.

Mass = 1500 N/10 m/s^2

= 150 Kg

Thus the mass of the object can be obtained as 150 Kg

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Answer: The answer is A

Explanation: I have the same exact question as you and i took a quiz with this exact question and it said that was the answer and i also took a quizlet with this question and it also said the answer was A hope this helped :)!

The repetition of the experiment allows to support the results, therefore the correct answer is:

based on experimental evidence

The theory is a set of rules, principles and knowledge that are developed from models and experiments that are carried out repeatedly, finding similar results in any given case.

In this case, Ellie repeated each experiment several times, finding results that lead to the result that the two balls hit the ground at the same time, therefore her conclusions are supported by experimental evidence.

In conclusion the conclusions of the experiment of dropping the balls the correct answer is: it is based on the experimental evidence

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Answer:

unmmmmmmmm I think the answerA

The cart travels approximately 3.33 meters when a man is pulling a cart having a mass of 2kg and an acceleration of 3 m/s².

To find the distance traveled by the cart, we'll use the work-energy theorem, which states that the work done on an object is equal to the change in its kinetic energy. The formula for work is:
Work = Force x Distance x cos(θ)
Since the man is pulling the cart, the angle (θ) between the force and the distance is 0 degrees, and cos(0) = 1.

So the formula simplifies to:
Work = Force x Distance
The force acting on the cart can be found using Newton's second law of motion:
Force = Mass x Acceleration
Given that the mass of the cart is 2 kg and its acceleration is 3 m/s², we can calculate the force:
Force = (2 kg) x (3 m/s²) = 6 N
Now we can find the distance traveled using the work done (20 J) and the force (6 N):
20 J = (6 N) x Distance
To solve for distance, divide both sides by 6 N:
Distance = 20 J / 6 N = 10/3 meters ≈ 3.33 meters

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Answer: C. electricity and magnetism  

Explanation:

Answer:

B.

electricity and magnetism

is the ans

I find this in physics

The event that marks the end of a star's evolutionary life before becoming a white dwarf is a planetary nebula. So, option E is correct.

A planetary nebula is characterized by cosmic rays of gas and dust surrounding a dying star. This dying star becomes a white dwarf after the complete depletion of hydrogen in the core.

It gets its name from a scientist who described the gases to be looking like two planets around a dying star. Thus, it's called planetary nebulae. This marks the final stage of a dying star that becomes a white dwarf. It consists of the outer layers of the star.

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At an atomic level, electrostatics is responsible for most of the physical phenomena that we encounter in our everyday life. Every object we see around us, such as chairs, buildings, and people, are made up of atoms, and every atom has electrons that are negatively charged, protons that are positively charged, and neutrons that have no charge.

Electrostatics is the study of electric charges at rest and of the forces and fields associated with these charges. Electrons are held in atoms by the attraction of the positive nucleus for the negative charge of the electrons. This attraction is known as electrostatic force. The protons in the nucleus are also held together by electrostatic forces, which are much stronger than those that bind electrons to the nucleus.
The forces between charged objects are governed by Coulomb's Law. This law states that the force between two charged objects is proportional to the product of their charges and inversely proportional to the square of the distance between them. If the charges have the same sign, the force is repulsive; if they have opposite signs, the force is attractive.
Electrostatic forces play an important role in many physical phenomena, such as the attraction of dust particles to a TV screen, and the Van de Graaff generator, which uses electrostatic forces to build up very high voltages.

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Answer:

i think b sorry if im wrong!

Explanation:

Answer:The disturbance created by a source of sound in the medium travels through the medium and not the particles of the medium

Explanation:i hope this is right

The term refers to how loud or soft a sound will be wavelength. Then the correct option is A.

In physics, math, and related fields, a wave is a dynamic disturbance of one or more variables that spreads. Waves are referred to as periodic when they oscillate repeatedly around an equilibrium value at a specific frequency.

The wave can be represented as,

f(x) = A sin (ωt + ∅)

Where 'A' is the amplitude, 'ω' is the frequency, 't' is the time period, and '∅' is the phase difference.

Depending on the medium that it is moving through, sound has a wide range of speeds. The stiffness of the medium (or compressibility in the case of gases) and its density work together to define the speed of sound in that medium. The speed of sound increases with the rigidity (or lack of compressibility) of the medium.

If the amplitude is high then the voice is loud. Similarly, if the amplitude is low then the voice is soft.

The wave

The phrase describes a sound's wavelength, or how loud or soft it will be. Then, choice A is the best one.

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Answer:

F = m g / 4,  F = 12250 N

Explanation:

For this exercise we must use the rotational equilibrium relation

          ∑τ = 0

let's set a reference system on the wheel where the bus is turning and that the anti-clockwise rotations have been positive

          -2F x_string + W x_bus = 0

          x_bus =\frac{l}{2} cos 45

          x_string = l cos 45

where F is the force on each wheel and W the weight of the bus ,, we assume that the center of mass is in the middle and x_bus is the perpendicular distance from the center of mass to the turning point.

             2F l cos 45 = W \(\frac{l}{2}\)  cos 45

             F = m g / 4

to finish the calculation we must assume a mass for the bus m = 5000 kg

             F = 5000 9.8 / 4

              F = 12250 N

Extra care should be taken while installing the Liquidtight flexible nonmetallic conduit in such weather conditions. Option(C) is correct.

It is a limit for Liquidtight flexible nonmetallic conduit that it cannot be used in direct sunlight unless marked for this application. Liquidtight flexible nonmetallic conduit can only be used outdoors if it is explicitly marked for outdoor use and is exposed to sunlight without causing damage.

Any exposure to direct sunlight may cause the conduit to degrade, which may result in safety concerns. It can become brittle in extremely cold temperatures: It is a limit of Liquidtight flexible nonmetallic conduit that it can become brittle in extremely cold temperatures. It is a limitation of Liquidtight flexible nonmetallic conduit that, in extremely cold weather, it may become brittle and lose its capacity to flex.

When the temperature drops below a certain level, the material begins to harden, making it vulnerable to cracking or shattering. Therefore, extra care should be taken while installing the Liquidtight flexible nonmetallic conduit in such weather conditions.

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No, this roller-coaster would not able to make it around the loop because the hill would need to be higher than the loop's highest part,

The potential energy stored in the roller coaster from the first hill is not sufficient to make around-the-loop.

The sum of all the energy in motion (total kinetic energy) and all the energy that is stored in the system (total potential energy) is known as mechanical energy.

The expression for total mechanical energy can be given as follows

ME= PE + KE

The roller coaster would not be able to complete the loop because the hill would need to be higher than the highest point of the loop, and the potential energy stored in the roller coaster from the first hill would not be enough to complete the circle.

Therefore, the correct answer is option A.

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Answer: a=F/m , a = 300N/25N , a= 12 m/s2

Explanation: Divide the 300 by 25 you get 12 . If your wondering how i got 25N in the eqaution it because you change 25kg to 25N. I hope this helps you

Acceleration of an object is the force divided by mass. The acceleration of the roller coaster to push the 25 kg person with a force of 300 N is 12 m/s².

Acceleration is a physical quantity measuring the rate of change in velocity. It is a vector quantity having both magnitude and acceleration. Acceleration has the unit of m/s².

According to Newton's second law of motion, the force acting on a body is the product of its mass and acceleration.

F = ma

Given that, mass of the person = 25 kg

force applied on the body = 300 N

acceleration = force/mass

a = 300 N/25 kg = 12 m/s²

Therefore, the acceleration of the roller coaster is 12 m/s².

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Answer:

I think it's An inelastic collision occurs when an arrow hits the target because when the arrow hits it, the target and the arrow do not bounce away from each other.

Explanation:

Answer:

2%

Explanation:

E=l/E x r/R x100%

=5000/50 x 0.1/0.6 x100

=2% or 166.7

Answer:

a)  \(F_{net}=0\)

b)  \(T=0\)

Explanation:

From the question we are told that:

Dimensions:

\(L*B=22.0*35.0cm\)

Current \(I=1.40A\)

Magnetic field \(B=1.40\)

Therefore

\(Area=L*B\)

\(A=22.0*35.0cm\)

\(A=770cm=>770*0^{-4}\)

a)

Generally Force on Looping gives

\(F_1-F_2\)

\(F_3=F_4\)

Therefore

\(F_{net}=0\)

b)

Generally the equation for Torque is mathematically given by

\(T=i*Asin \theta\)

Since A and B are on opposite direction

\(\theta=180\)

Therefore

\(T=1.40*770*10^{-4}sin 180\)

\(T=0\)

I'm gonna have to guess B) Automation sorry if I get it incorrect

Answer:

the volume increase

Explanation:

because because when the speed of the vibrations decrease the speech of the sounds become loud

The mass of the bullet is calculated to be 0.04 kilograms.

This can be calculated using the following formula:

mass = force / acceleration

In this case, the force is 2,000 Newtons and the acceleration is 50,000 meters per second squared.

So, the mass of the bullet is:

mass =\(2,000 N / 50,000 m/s^2\)

        \(= 0.04 kg\)

The mass of the bullet is very small because it is traveling at a very high speed.

The force of the bullet is what propels it forward, and the acceleration is how quickly the bullet is gaining speed.

The smaller the mass of the bullet, the more force is required to accelerate it to a given speed.

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Answer:

when waterways are polluted it affects all forms of life in the area - including us

expression:

for example when Lakes streams and ponds are polluted it can kill or harsh fish and other Wildlife that lives there!

hope that helps !

Answer:

ADHD, also called attention-deficit disorder, is a behavior disorder, usually first diagnosed in childhood, that is characterized by inattention, impulsivity, and, in some cases, hyperactivity.

Explanation:

Answer:

There are various areas that should be considered to access the fitness level of an individual.

Explanation:

Knowing the specific details can help an individual to set realistic fitness goals, monitor their progress, and retain motivation. Fitness is typically measured in four main areas: cardiovascular fitness, muscle strength and endurance, flexibility, and composition of the body. It is important to evaluate these vital components of fitness so that one gets a fair knowledge of present fitness level and plan for the future accordingly.

(a) The tension in the nearer cable is 941 N, and (b) the tension in the farther cable is 1373 N.

We need to find the tension in both the nearer and farther cables supporting the scaffold with a window washer on it.

a) To find the tension in the nearer cable, we must first calculate the total torque acting on the system, keeping in mind that the torque must be zero for the system to be in equilibrium. The torque contributions are:

1. The torque due to the window washer's weight (80 kg * 9.81 m/s²) acting at a distance of 1.5 m from the nearer cable.

2. The torque due to the scaffold's weight (60 kg * 9.81 m/s²) acting at the midpoint of the scaffold, which is 2.5 m from each cable.

Now, we can set up the torque equation:

T_near * 5.0 m = (80 kg * 9.81 m/s² * 1.5 m) + (60 kg * 9.81 m/s² * 2.5 m)

Solve for T_near:

T_near = ((80 kg * 9.81 m/s² * 1.5 m) + (60 kg * 9.81 m/s² * 2.5 m)) / 5.0 m
T_near ≈ 941 N

b) To find the tension in the farther cable, we can use the fact that the sum of the tensions in both cables must equal the total weight of the system (scaffold + window washer):

T_far + T_near = (80 kg + 60 kg) * 9.81 m/s²

Solve for T_far:

T_far = (140 kg * 9.81 m/s²) - T_near
T_far ≈ 1373 N

Therefore,  the tension in the nearer cable (a) is approximately 941 N, and the tension in the farther cable (b) is approximately 1373 N.

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A Final statement or concluding statement

The equation that relates wavelength, frequency, and speed of light is

c=λ × ν

To find wavelength, λ = c / f

λ = wavelength in meters

ν = frequency in Hertz (Hz) or 1s or \(s^{-1}\).

= 3 ×\(10^{8}\) m/s / 4. 75 × \(10^{14}\) \(s^{-1}\)(Using velocity of light as 3 x 108 m/s)

= \(6.3\)×\(10^{-7}\)m

= \(6.3\) × \(10^{2}\) nm

Electromagnetic radiation is an electric and magnetic disturbance that travels at the speed of light through space. It has no mass or charge and travels in packets of radiant energy known as photons or quanta.Radio waves and microwaves, as well as infrared, ultraviolet, gamma, and x-rays, are examples of EM radiation.  Electromagnetic radiation moves at a constant speed in the form of a waveform.

The relationship of velocity to wavelength and frequency reveals the wave characteristics of EM radiation.

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Answer:

light waves :)

Explanation:

Answer:

Due to the general stability of Egyptian life and culture, all arts - including architecture and sculpture, as well as painting, metalwork and goldsmithing - were characterized by a highly conservative adherence to traditional rules, which favoured order and form over creativity and artistic expression

(A) A faster speed requires more total energy.

The kinetic energy of an object is given by the formula KE = (1/2)mv², where m is the mass of the object and v is its velocity. The energy required to cover a distance is the product of the force applied and the distance traveled. In the case of the kangaroo hopping, the force is supplied by the kangaroo's muscles, and the energy required is proportional to the distance traveled and the work done to overcome friction and air resistance.

When the kangaroo hops faster, it has a greater velocity, which means it has more kinetic energy. This requires more total energy to cover the same distance. Additionally, air resistance and friction increase with velocity, so the energy required to overcome these forces also increases with speed. Therefore, a faster speed requires more total energy.

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