The 2 Mg(mega gram) car has a velocity of v1=100 km/h when the driver sees an obstacle in front of the car. If it takes 0.75 s for him to react and lock the brakes, causing the car to skit, determine the distance the car travels before it stops. The coefficient of kinetic friction between the tires and the road is μk= 0.25

Bonding jumper is located at the service disconnect. This is the point in the electrical system where the main breaker or fuses are located, and where the power from the utility company enters the building.

The main bonding jumper is an important component that connects the grounded conductor (neutral) and the equipment grounding conductor to ensure a low-impedance path for fault currents. This helps to prevent electrical shock and fire hazards.

the main bonding jumper plays a crucial role in ensuring the safety and proper functioning of the electrical system, and it is located at the service disconnect.


To ensure safety and proper functioning of an electrical system, it is important to know the location of the main bonding jumper, which is at the service disconnect.

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The main bonding jumper is situated at the b) service disconnect. It plays a key role in ensuring safety by causing the circuit breaker to trip in case of a fault condition, which then forces the repair of the appliance. Besides, circuit breakers and GFCIs are also vital protective devices for preventing electrical accidents.

The main bonding jumper is typically located at the service disconnect (b), which is designed to interrupt the electric service for maintenance or emergency.

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The maximum possible speed of the train at the end of the first 4.0 km of the journey is 0 m/s.

To calculate the maximum possible speed of the train at the end of the first 4.0 km of the journey, we can apply the principle of conservation of energy.

Assuming there are no external forces like friction or air resistance, the initial potential energy of the train will be converted into kinetic energy.

The potential energy (PE) of the train at the beginning of the journey can be calculated as PE = mgh, where m is the mass of the train, g is the acceleration due to gravity (approximately \(9.8 m/s^2\)), and h is the height difference (in this case, we assume it to be zero).

The kinetic energy (KE) of the train at the end of the 4.0 km journey can be calculated as \(KE = (1/2)mv^2\), where v is the velocity of the train.

Since the potential energy is converted into kinetic energy, we can equate the two expressions:

PE = KE

\(mgh = (1/2)mv^2\)

Simplifying and canceling out the mass:

\(gh = (1/2)v^2\)

Substituting the values, \(g = 9.8 m/s^2\)and h = 0, we get:

\((9.8 m/s^2)(0) = (1/2)v^2\)

Simplifying further:

\(0 = (1/2)v^2\)

This equation tells us that the maximum possible speed of the train at the end of the first 4.0 km of the journey is 0 m/s.

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Electromagnetic waves (EMW) are reflected and attenuated by obstacles such as buildings, tunnels, walls, mountains, and other physical structures. At home, you can use the remote control (remote) for the television receiver as an example. The remote's lens can also attenuate and reflect EMW.

The remote control emits an infrared light beam that travels from the remote to the TV's receiver. If the remote control is aimed directly at the receiver, the receiver can detect the infrared light beam and execute the command accordingly.However, if the remote's lens is obstructed by an object, the light beam is weakened, attenuated, or even reflected, resulting in the TV not responding to the remote control's command.

The obstacle that obstructs the light beam reflects and attenuates the EMW, rendering the signal too weak for the receiver to detect.In conclusion, electromagnetic waves (EMW) can be attenuated or reflected by physical obstacles such as buildings, walls, mountains, and other structures. Remote controls are a common example of how EMW can be obstructed by an object and, as a result, weaken or reflect.

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Answer:

nionionohibuib

Explanation:

njkjnkj

C. D(S(r)) represents the distance of Robert's jump as a function of the height of the ramp.

Distance is a scalar quantity that represents the magnitude of the separation between two points in space. Distance can be measured in a variety of units, including meters, kilometers, miles, and others. It can be calculated in one, two, or three dimensions, depending on the situation. Distance is a fundamental concept in physics and mathematics, used to describe the position and motion of objects in space.

In physics, distance is used to calculate things such as velocity, acceleration, and force. It is also used to describe the position of objects in time and space, and to model the behavior of objects in motion. For example, when an object is thrown or launched into the air, the distance it travels can be calculated by considering factors such as initial velocity, air resistance, and gravity.

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Answer:

ntergalactic space takes up most of the volume of the universe, but even galaxies and star systems consist almost entirely of empty space.

Explanation:

so to be exact galixes do make up most of the volume of space because galaxies are what make up space!

Answer: the thing that brings you life- h2o- idrk the question but if this helps your welcome ^-^have a good day

Explanation:

The count of the number of tools is fundamental because it allows us to design a suitable experimental procedure.

An experimental procedure is a step of the scientific method based on a process to validate or reject our working hypothesis.

The experimental procedure needs to have into account the different tools required for the experiment to be carried out by the researcher.

In conclusion, the count of the number of tools is fundamental because it allows us to design a suitable experimental procedure.

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Energy may be produced using solar, wind, hydropower, biomass, and geothermal energy without using fossil fuels, which overheat the globe.

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The sample of the solid in grams is 5.5g

HOW TO CALCULATE SPECIFIC HEAT CAPACITY:

Q = m × c × ∆T

Where;

Q = quantity of heat absorbed/released (cal)

m = mass of the substance (g)

c = specific heat (cal/g°C)

∆T = change in temperature (°C)

Q = 7.90Kcal = 7900cal

m = ?

c = 11.5 cal/g°C

T1 = 135K = 135K − 273.15 = -138.1°C

T2 = 260K = 260K − 273.15 = -13.15°C

∆T = -13.15 - (-138.1) = 124.95°C

m = Q ÷ c∆T

m = 7900 ÷ (11.5 × 124.95)

m = 7900 ÷ 1436.93

m = 5.5grams.

Therefore, the sample of the solid in grams is 5.5g.

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Answer:

1470kgm/s

Explanation:

Given parameters:

Mass of the rock = 50kg

Time taken for the free fall  = 3s

Unknown:

Change in momentum = ?

Solution:

The change in momentum will be difference between the ending momentum and finishing momentum.

  Momentum is the product of mass and velocity

       Momentum  = mass x velocity

Initial momentum  = 0, the velocity is 0

Final momentum = mass x final velocity

      let us find the final velocity;

                V = U + gt

V is the final velocity

U is the initial velocity

g is the acceleration due to gravity = 9.8m/s²

t is the time

                 V  = 0 + 9.8x3 = 29.4m/s

So;

 Change in momentum  = 50 x 29,4  = 1470kgm/s

The key to walking on fire without burning one's feet is the low thermal conductivity of ash and the short time the feet stay in contact with the hot coals.

Firewalking is a practice of walking on a bed of hot embers or coals that are usually from a wood fire. Most fire walkers practice this act for religious, spiritual, or cultural events.

The key factor that makes it possible for fire walkers to walk on hot embers without getting burned is the coals' low thermal conductivity. Thermal conductivity is the ability of a material to conduct heat. The lower the thermal conductivity, the less heat a material conducts.

Firewalkers usually walk on ash-covered embers that have been burning for several hours. Firewalkers walk across the embers quickly, taking short steps and keeping their weight on the balls of their feet.

This ensures that their feet are in contact with the hot coals for a minimal amount of time, making it possible to walk on fire without burning their feet.

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Answer:

Fusion

Explanation:

Fusion is what powers the sun. Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.

Answer: 120 km per hour.

Explanation: 300/2.5 = 120.

The little sister is sitting closer to the fulcrum in the center of the seesaw.

To determine which child is sitting closer to the fulcrum (center) of the seesaw, compare their distances from the fulcrum.

Assume that the boy is sitting at a distance of x meters from the fulcrum, and the little sister is sitting at a distance of y meters from the fulcrum.

The torque is given by the product of the force and the distance from the fulcrum: Torque = Force × Distance.

For the boy: Torque_boy = 800 N × x

For the little sister: Torque_sister = 400 N × y

Since the seesaw is balanced, Torque_boy = Torque_sister.

800 N × x = 400 N × y

To determine which child is closer to the fulcrum, we need to compare the values of x and y. Since the torque is directly proportional to the distance, the child sitting at the smaller distance from the fulcrum will exert a larger torque.

Therefore, the little sister is sitting closer to the fulcrum in the center of the seesaw.

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The equation of the force between the two masses separated by distance r, is determined as Gmm/r².

The equation of the force between the two masses is determined from Newton's law of universal gravitation as shown below.

f = Gmm/r²

where;

Thus, the equation of the force between the two masses separated by distance r, is determined as Gmm/r².

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The Thrust on the rocket is 1.434 MN.

To calculate the thrust of a rocket, we use the formula below

Thrust: This is the force that moves an aircraft through the air.

⇒Formula

⇒ Where:

From the question,

⇒ Given:

⇒ Substitute these values into equation 1

Hence, the Thrust on the rocket is 1.434 MN.

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Answer:

Q = N e     where N is number of electrons and Q is total charge

I = Q / t       where I is current and t = sec

I = Q / t = 12.55E-6 Coul / Sec

Q = 12.55E-6 Coul/sec * 2.39 sec = 3.00E-5 Coul    total charge

N = 3.00E-5 coul / 1.60E-19 coul = 1.87E14 electrons

(electronic charge = 1.60E-19 Coul)

Ocean thermal energy conversion (OTEC) is a technology that uses the temperature differences between warm surface water and cold deep water in the ocean to generate electricity. The temperature difference can be significant, up to 20 degrees Celsius or more in some places, and this temperature gradient can be harnessed to drive a power-generating turbine.

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A hypothesis is a tentative prediction wave about how empirical events or attributes will be related or patterned. However, they are not proven to be true or false, but rather supported or rejected based on empirical evidence.

A hypothesis is a statement that proposes a relationship between two or more variables and is testable through empirical research. It is an educated guess that is made based on prior knowledge, observation, and theories. Hypotheses are important in the scientific method as they guide the research process and provide a framework for collecting and analyzing data.

A hypothesis is an educated guess based on existing knowledge and observations. It serves as a starting point for further investigation and testing through experimentation or data analysis. By stating a hypothesis, researchers can make predictions and design experiments to test the validity of their hypothesis, ultimately contributing to the development of scientific knowledge.

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Answer:

sodium chloride

Explanation:

a 0.75 kg projectile has been shot straight up with an initial speed of 18m/s. Then 16.2 m high would it go if there were no air friction.

An object which  is propelled by the application of an external force and as a result then moves freely while being affected by the gravity and air resistance is termed to as a projectile. Projectiles are often used in sports and warfare, despite the fact that any item traveling through space is a basically a projectile.

To find  how high would it go if there were no air friction we will use the following

ΔKE=PE

1/2mu^2-1/2mv^2=mgh

given 1/2mu^2= 1/2*0.75*18^2

1/2mv^2=0m/s

h=?

putting values we get

121.5-0=0.75*10*h

121.5/7.5=h

h=16.2 m

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By Using Euler's method with two steps, we can find the approximate value of Y(2) is 2.125. , where Y is the solution of the initial value problem dy/dx = x - y, and Y(1) = 3.

Euler's method is defined as a numerical technique which is  used to approximate solutions into ordinary differential equations. The method includes dividing the interval of interest into smaller steps and thereafter approximating the solution at each step by using the derivative of the function.

In this case, we are given the initial value problem dy/dx = x - y, with the initial condition Y(1) = 3. To approximate Y(2) using Euler's method with two steps, we will divide the interval [1, 2] into two equal steps.

Step 1:

We start with the initial condition Y(1) = 3. Using the differential equation dy/dx = x - y, we can approximate the value of Y at the midpoint of the interval [1, 2].

Using the step size h = (2 - 1) / 2 = 0.5, we can calculate Y(1.5) as follows:

Y(1.5) ≈ Y(1) + h × (x - y) = 3 + 0.5 × (1.5 - 3) = 3 + 0.5 × (-1.5) = 2.25

Step 2:

Now, using the value of Y(1.5) as the new approximation, we calculate Y(2) using the same process:

Y(2) ≈ Y(1.5) + h × (x - y) = 2.25 + 0.5 × (2 - 2.25) = 2.25 + 0.5 × (-0.25) = 2.125

Thus,  by using Euler's method with two steps, the approximate value of Y(2) is 2.125.

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The complete question is

Use Euler's Method With Two Steps To Approximate Y(2), Where Y Is The Solution Of The Initial Value Problem: Dy : X − Y, Y(1) = 3

I'm pretty sure this poor guy could never have been accepted for astronaut training, much less a mission to the Moon.  

He weighs something like 335 pounds when he's ON THE MOON !

If he has enough fuel, and survives a trip back to Earth, he'll weigh around 9,080 Newtons here.  That's like 2,040 pounds ... durn close to a ton ! !

Answer:

Gravitational field strength:

Moon is 1.6N/kg

Earth is 9.8N/kg or 10N/kg

Moon:

Weight = mass x gravitational field

1500N = m x 1.6N/kg

÷1.6 both sides

937.5 = m

Mass of astronaut is 937.5kg

(Your mass doesn't change, no matter where you go, in space)

Earth:

Weight = mass x gravitational field

= 937.5kg x 9.8 N/kg

= 9187.5N

Or

Weight = mass x gravitational field

= 937.5kg x 10 N/kg

= 9375N

Thus, the astronaut's weight will be 9187.5N or 9375N on Earth.

Hope this helps!

Answer:

The amount of oil is nullified by the dogs amazing the yes

Explanation:

very yes

Answer:

ballance

i just took the quiz

Answer:

4ms^-2

Explanation:

m = 45Kg, Frictional force = 120N, Applied force = 300N, a = ?

Firstly, you find the net force acting on the body

Net force = Applied force - Frictional force

Net force = 300N - 120N = 180N

F = 180N

using the formula for Force

F = ma

Then making acceleration subject of the formula; you will get:

a = F/m

a = 180N/45Kg

a = 4ms^-2

An electrical conductor is a substance or object that allows electricity to flow through it with low resistance. Conductors are materials that have free electrons that can move easily through the material, allowing the electric current to flow.

Examples of conductors include metals such as copper, aluminum, and silver, as well as some non-metallic materials such as graphite and carbon. In contrast, insulators are materials that do not allow electricity to flow through them easily, because they have few free electrons or have electrons that are tightly bound to the atoms in the material. Examples of insulators include rubber, plastic, and glass.  

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The energy of a violet photon is higher than the energy of a red photon because energy is directly proportional to frequency. Since the frequency of violet light is about twice that of red light, this means that each violet photon has twice the energy of each red photon.

This is because photons are discrete packets of energy, and the energy of each photon is directly related to the frequency of the electromagnetic wave it represents. So, the higher the frequency of the wave, the more energy each photon carries.We can use the Planck's equation to compare the energy of violet and red photons. Planck's equation is given by:
E = h × f
where E represents energy, h is Planck's constant (6.63 x 10^(-34) Js), and f is the frequency of light.
Since the frequency of violet light is about twice that of red light, we can write:
f_violet = 2 × f_red
Now, we can find the energy of each photon:
E_violet = h × f_violet
E_red = h × f_red
To compare the energy of a violet photon with the energy of a red photon, divide E_violet by E_red:
(E_violet) / (E_red) = (h × f_violet) / (h × f_red)
Notice that h cancels out:
(E_violet) / (E_red) = f_violet / f_red
Since f_violet = 2 × f_red:
(E_violet) / (E_red) = 2
So, the energy of a violet photon is twice the energy of a red photon.

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