The Jenkins family and the Clark family each used their sprinklers last summer. The water output rate for the Jenkins family's sprinkler was per hour. The water output rate for the Clark family's sprinkler was per hour. The families used their sprinklers for a combined total of hours, resulting in a total water output of . How long was each sprinkler used

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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Answer:

1200 Newton

Explanation:

Force is equal to mass times acceleration

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Answer:

the answer is different

Explanation:

i took the test

A photon's energy and wavelength are inversely related. Since the wavelength of photons of blue light is less than photons of red light, it contains more energy than red photons.

Wavelengths of blue light are shorter, ranging from 450 to 495 nanometers. Red light has wavelengths that range from 620 to 750 nm and longer waves. Compared to red light, blue light has a greater frequency and more energy.

A photon's energy varies with its wavelength; those with longer wavelengths have less energy than those with shorter ones. For instance, red photons are less energetic than blue ones.

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Volcanoes on Enceladus affect the E Ring of Saturn by Option D) supplying ring particles.

Volcanoes on Enceladus, one of Saturn's moons, affect the E Ring of Saturn primarily by supplying ring particles. Enceladus is known for its cryovolcanism, which means that instead of spewing molten rock like on Earth, these volcanoes eject water, ice, and other volatile substances. This process occurs due to the internal heat generated within Enceladus, which causes water and other materials to rise to the surface and be ejected into space.

The particles released by the cryovolcanoes become ionized and are attracted to Saturn's magnetic field, forming a plasma torus around the planet. This torus coincides with the location of the E Ring, and the ejected particles contribute to the formation and maintenance of the ring. Additionally, these particles create a diffuse and faint appearance, which is a characteristic feature of the E Ring.

In summary, the cryovolcanic activity on Enceladus plays a significant role in supplying particles to Saturn's E Ring. The ejection of water, ice, and volatile substances from Enceladus' surface contributes to the formation, maintenance, and unique appearance of the ring. Therefore, Option D is Correct.

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Answer:

Answer: hydraulic press and hydraulic brakes. ... This law is useful in designing instruments like Bramah press ,Hydraulic press , Hydraulic jack etc. It is the principle in the development of hydraulic brakes , that are used in automobiles. It is also known as law of transmission of fluid pressure

Answer:

Approximately \(33\; {\rm m\cdot s^{-2}}\).

Approximately \(55\; {\rm m\cdot s^{-2}}\).

(Assume that the table is level, and that the \(60\; {\rm N}\) force is horizontal.)

Explanation:

Consider all three blocks as one object of mass \(m = (1 + 4 + 6)\; {\rm kg} = 11\; {\rm kg}\). Among all the forces that are in action, the only unbalanced external force on this \(m = 11\; {\rm kg}\) object will be the \(60\; {\rm N}\) force. Hence, the resultant force of this combined object of mass \(m = 11\; {\rm kg}\) will be \(F_{\text{net}} = 60\; {\rm N}\).

Acceleration \(a\) of this combined object will be:
\(\begin{aligned}a &= \frac{F_{\text{net}}}{m} \\ &= \frac{60\; {\rm N}}{11\; {\rm kg}} \\ &= \frac{60}{11}\; {\rm m\cdot s^{-2}}\end{aligned}\).

Since the three crate blocks are moving together, each will have the same acceleration, \(a = (60/11)\; {\rm m\cdot s^{-2}}\).

Resultant force on each of the crate blocks will be:

Assume that the \(60\; {\rm N}\) external force on the \(1\; {\rm kg}\) block points to the right.

When the crates are considered individually, external forces on the \(1\; {\rm kg}\) crate will include:

Since these two forces are in opposite directions, the resultant force on this \(1\; {\rm kg}\) block will be \((60\; {\rm N} - x\; {\rm N})\). However, since the actual resultant force on this block (calculated from acceleration) is \((60 / 11)\; {\rm N}\):

\(\displaystyle 60\; {\rm N} - x\; {\rm N} = \frac{60}{11}\; {\rm N}\).

Therefore, the force that the \(4\; {\rm kg}\) block exerts on the \(1\; {\rm kg}\) block will be

\(\displaystyle 60\; {\rm N} - \frac{60}{11}\; {\rm N} = \frac{600}{11}\; {\rm N} \approx 55\; {\rm N}\).

When considered individually, the only unbalanced external force on the \(m = 6\; {\rm kg}\) block is the normal force from the \(4\; {\rm kg}\) block. Hence, this force will be equal to the resultant force on the \(m = 6\; {\rm kg}\) block, \((360 / 11)\; {\rm N} \approx 33\; {\rm N}\).

The mass of the radioactive sample Pb – 214 is 0.0437 g.

The activity of the sample is given to be 3.17 x 10^4 decay/s, and the half-life is 26.8 minutes. The mass of the radioactive sample Pb-214 can be calculated using the given information.

The decay constant can be calculated using the formula:

λ = ln(2) / t1/2

Where λ is the decay constant and t1/2 is the half-life. Substituting the values of t1/2, we get:

λ = ln(2) / 26.8

λ = 0.0258 min^-1

The activity is given by the formula:

A = λN

Where A is the activity, λ is the decay constant, and N is the number of radioactive nuclei. Substituting the values, we get:

3.17 x 10^4 = 0.0258 x N

N = 1.23 x 10^6 radioactive nuclei

The mass of the radioactive sample can be calculated using the formula:

m = N x M / Na

Where m is the mass of the sample, N is the number of radioactive nuclei, M is the molar mass of the sample, and Na is the Avogadro number. Substituting the values, we get:

m = 1.23 x 10^6 x 214 / 6.02 x 10^23

m = 0.0437 g

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Answer:

she improved upon the works of plato

Answer: A she became a teacher at Alexandria

Explanation:

Within the subject of technology, radiogenic heat may be described because of the type of warmth that is released when radioactive isotopes disintegrate. consequently, we say that the thermal strength is launched by means of the nuclear disintegration of the radioactive isotopes.

Approximately 50% of the Earth's inner warmness originates from radioactive decay. four radioactive isotopes are chargeable for the general public of radiogenic warmness because of their enrichment relative to different radioactive isotopes uranium-238 (238U), uranium-235 (235U), thorium-232 (232Th), and potassium-40 (40K).

Radioactive heating refers back to the power dissipated within the interiors of planets, satellites, or asteroids as a consequence of the radioactive decay of radioactive isotopes (see radiochemistry). Radioactive isotopes are characterized by their decay energies and their half-lives.

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Answer:

It will roll 9 meters in 3 seconds

Explanation:

3 m/s times 3 is 9

Thanks for warning me.

I'll be careful to stay out of its way.

Do you have a question to ask ?

Answer:

A coil having 45 loops

Explanation:

The strength of an electromagnet is proportional to the number of loops. So, when we have more loops, we will get mor strength. It means that the coil that will produce a magnetic field with the maximum strenght is a coil having 45 loops because 45 is the greatest number in the list.

Answer:

B. It changes the objects direction

Designing investigations to predict the effect of hurricanes (D) best describes a scientific endeavor.

A scientific endeavor builds scientific knowledge by postulating theories that explains any phenomenon. It might differ from what was already known as the truth. In a scientific endeavor, a problem is first identified, observations are made, hypothesis are created based on the observations and experiments are conducted to prove the hypothesis.

The other options manly focusses on developing devices and technologies to prevent or withstand hurricanes which are examples of engineering endeavors.

Therefore, Designing investigations to predict the effect of hurricanes (D) best describes a scientific endeavor.

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The work output of the engine is 1,204 J and the heat transfer to the environment is 4.4 x 10^3 J.

To answer part (a), we can use the formula for efficiency of a cyclical heat engine:
Efficiency = (Work Output / Heat Input) x 100
We know the efficiency is 21.5%, which can be expressed as 0.215 in decimal form. We also know the heat input is 5.6 x 10^3 J. So, we can rearrange the formula to solve for work output:
Work Output = Efficiency x Heat Input
Work Output = 0.215 x 5.6 x 10^3
Work Output = 1,204 J
Therefore, the work output of the engine is 1,204 J.
To answer part (b), we know that in any cyclical heat engine, some heat is lost to the environment. We can use the formula:
Heat Transfer to Environment = Heat Input - Work Output
Substituting in the values we know:
Heat Transfer to Environment = 5.6 x 10^3 - 1,204
Heat Transfer to Environment = 4.4 x 10^3 J

Therefore, the amount of heat transfer to the environment is 4.4 x 10^3 J.

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Explanation:

Draw a free body diagram.  There are two forces: weight force pulling down and air resistance pushing up.

Sum the forces in the y direction:

∑F = 50 N − (30 kg) (10 m/s²)

∑F = -250 N

Earth's gravitational field = 10N/kg

Jupiter's gravitational field = 23.6 N/kg

Jupiter's gravitational field > Earth's gravitational field

Therefore, we will weigh more on Jupiter.

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The center of mass of a human body may lie within or outside the body. Therefore, the correct option is (d) may lie within or outside the body.

The center of mass of a human body is located at a point that may lie within or outside the body.

The center of mass is the point where the mass of a system is concentrated, and it depends on the distribution of mass within the system. In a human body, the distribution of mass varies depending on factors such as body composition, posture, and movement.

For example, the center of mass of a person standing upright with their arms at their sides will be located within the body, whereas the center of mass of a person performing a backflip will temporarily move outside the body during the maneuver.

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The energy of a photon is given by the equation E = hf, where h is Planck's constant and f is the frequency of the photon. Substituting the given values, we get:

E = (6.6 x 10^-34 J s) x (4 x 10^4 Hz)
E = 2.64 x 10^-29 J

Therefore, the energy of a photon with a frequency of 4 x 10^4 Hz is 2.64 x 10^-29 Joules.

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Yes, it does because, according to Ohm's law, the resistance of a conductor is directly proportional to the current passing through it, and inversely proportional to the cross-sectional area of the wire (R=V/I).

So, when the current through a wire increases, its resistance also increases ( 'cause the current causes more collisions between electrons and atoms in the wire, which increases the resistance); conversely, when the current through a wire decreases, its resistance also decreases.

Answer:

Explanation:

Yes, current does affect the resistance of a metal wire. When an electric current flows through a wire, the moving electrons experience resistance, which is the opposition to the flow of electric charge. The resistance of a wire depends on various factors, such as its length, cross-sectional area, and the material it is made of.

When the current increases, more electrons move through the wire, leading to a higher collision frequency with the wire's atoms, which increases resistance. Conversely, when the current decreases, there are fewer collisions, resulting in lower resistance. Therefore, the resistance of a metal wire is influenced by the amount of current flowing through it.

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The correct answe is X-rays

The infrared waves have a frequency range of 10¹

Answer:

An Ice Rink

Explanation:

Answer:

b

Explanation:

i remember this from a test

So, the speed of each mass when it has moved free of the spring on a frictionless, horizontal table is 4.48 m/s.To find the speed of each mass when it has moved free of the spring, we need to use the conservation of mechanical energy and the spring constant.

The potential energy (PE) stored in the spring can be calculated using Hooke's Law:
\(PE = (1/2) * k * x^2\)
where k is the spring constant (1.75 N/cm), and x is the compression distance (37.0 cm).

First, convert the spring constant to N/m:
\(k = 1.75 N/cm * (100 cm/1 m) = 175 N/m\)
Now, calculate the potential energy:
\(PE = (1/2) * 175 N/m * (0.37 m)^2 = 12.02225 J\)

Since the total mechanical energy is conserved, the potential energy stored in the spring will be converted into the kinetic energy (KE) of the masses when they are released. For each mass, we can write:
\(KE = (1/2) * m * v^2\)
where m is the mass (0.600 kg) and v is the speed of the mass.

As there are two identical masses, the total kinetic energy of the system is:
Total \(KE = 2 * (1/2) * m * v^2 = m * v^2\)

Since the total mechanical energy is conserved, the total kinetic energy equals the potential energy:
\(m * v^2 = 12.02225 J\)

Now, solve for v:
\(v^2 = 12.02225 J / 0.600 kg = 20.03708 m^2/s^2\)
\(v = √20.03708 m^2/s^2 = 4.48 m/s\)

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Answer: C

Explanation: You always have weight pushing down and natural force pushing up to neutralize those forces. The you add in friction and that’s how you find the answer. Plus I got it right in my quiz

Answer: Distance: 27m Displacement: 7m

Explanation: Distance is total, Displacement is from the start.

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The subatomic particles in the nucleus of an atom of argon depend on the nucleus and proton.

What subatomic particles?

A particle that is smaller than an atom is what is known as a subatomic particle. Protons, electrons, and neutrons are the three subatomic particles that make up an atom in most cases.

40Ar

18 protons, 22 neutrons, 18 electrons

There are 18 protons from the argon element. These 18 electrons because it is neutral, and 22 neutrons because 40 - 18 = 22.

Hence the total number of subatomic particles present in the nucleus is 22.

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Answer:

Atoms are so much smaller than the wavelength of visible light that the two don't really interact.

Explanation:

To put it another way, atoms are invisible to light itself.

Visible light has a wavelength that ranges from 400 to 700 nm. Atoms, in contrast, typically have a diameter of between 0.1 and 0.3 nm. The size difference is greater than a thousand times, even with straightforward calculations.

Over 500,000 times of magnification are possible using an electron microscope, which is sufficient to observe a great deal of information inside cells.

The electron microscope comes in a variety of varieties. Atoms and nanoparticles can be observed with the use of a transmission electron microscope.

In a chemical reaction, atoms cannot be formed or destroyed, since they are indivisible units. The mass and chemical characteristics of each atom of a specific element are the same.

Therefore, the atom's structure is invisible to visible light.

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Answer:

bad

Explanation:

The Correct option is D. Earth's Moon, by Sir Isaac Newton object appears in these sketches — drawn as seen through one of the first telescopes, in the early 17th century.

Isaac Newton is widely regarded as one of the most influential physicists in history. He made groundbreaking contributions to our understanding of the laws of motion, gravity, and optics, which laid the foundation for modern physics.

Newton's three laws of motion describe how objects move in response to forces, while his law of universal gravitation explains how all objects in the universe are attracted to each other. His work on optics included the development of the reflecting telescope and the discovery of the composition of white light through the use of prisms.

Newton's contributions to physics were based on his careful observations and mathematical analysis, which allowed him to formulate precise laws that could be used to make predictions about the behavior of physical systems.

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