Based on the time measurements in the table, what can
be said about the speed of the car on the lower track as
compared to the higher track?
How can the reasoning for the above answer be best
explained? On the higher track, the elapsed time is
Calculate speeds for each track. How much faster was
the car on the higher track than the lower track?

Answer:

"Crust" refers to a

terrestrial planet's outermost surface.

In general, the Earth's crust is divided into

older, thicker continental crust and younger, denser oceanic crust.

...

The thin, 40-kilometer (25-mile) deep crust of our planet — just

1 per cent of Earth's mass — contains all known universe existence.

Explanation:

Continental crust is thicker, 22 miles (35 km) on average and less dense than oceanic crust, which accounts for its mean surface elevation of about 3 miles (4.8 km) above that of the ocean floor (Archimedes’ principle). Continental crust is more complex than oceanic crust…

Earth's crust divides into the oceanic and continental crust. Oceanic crust is thinner, made of basalt, and mainly lies under the oceans. Continental crust is thicker, comprised mostly of granite, and partly submerged under oceans.

The Earth's crust can be divided into oceanic and continental crust. Oceanic crust, covering 55% of the Earth's surface, lies mostly under the oceans. It is typically around 6 kilometers thick and is composed of volcanic basalt rocks. These rocks are produced from the cooling of volcanic lava and primarily consist of silicon, oxygen, iron, aluminum, and magnesium.

On the other hand, the continental crust covers 45% of the Earth's surface and is thicker—ranging from 20 to 70 kilometers. Part of the continental crust is also submerged under oceans. Rather than basalt, it is made up predominantly of granitic rocks, which are a different class of volcanic silicates. Both types of crust have densities of around 3 g/cm³., which is thrice the density of water.

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Answer:

The total voltage of the circuit is 18 volts.

Explanation:

We have, three identical resistors of resistance 3 ohms are connected in series in a circuit.

For a series combination, the equivalent resistance is given by the sum of individual resistances i.e.

[tex]R_{eq}=R_1+R_2+R_3\\\\R_{eq}=3+3+3\\\\R_{eq}=9\ \Omega[/tex]

Let V is the voltage of the battery if the current in the circuit is 2 A. So,

[tex]V=IR[/tex]

[tex]V=2\times 9\\\\V=18\ V[/tex]

So, the total voltage of the circuit is 18 volts.

Answer:

Where's the options?

Explanation:

Answer:

where are the options so we can answer

(free point thanks)

Explanation:

Yes, the statement is true. When a train is slowing down, it's experiencing a form of acceleration known as negative acceleration or deceleration.

That's a great question about the concept of acceleration. The answer is True. Acceleration in Physics is defined as the rate of change of velocity per unit of time. This change in velocity could be either an increase (speeding up) or a decrease (slowing down). When a train is slowing down, it's indeed undergoing a type of acceleration called deceleration, which is a negative acceleration.

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When a train is slowing down, it is indeed accelerating, but in a negative direction. This is known as deceleration, and while it means the object is slowing down, it is technically still considered acceleration in physics.

The statement is true; when a train is slowing down, it is indeed accelerating - but in a negative direction. Acceleration, in physics, is a change in velocity, which includes either a change in its magnitude or direction. When the train slows down, the change in velocity is negative, and we refer to this as negative acceleration or deceleration. Even though the term 'deceleration' can sometimes cause confusion, from a physics standpoint, it's still considered acceleration because acceleration is a vector and has a direction associated with it.

As an example, let's take a look at a train moving with an initial velocity of 20 m/s. After some time, its speed drops to 10 m/s. Here, there's a negative change in velocity, so the acceleration will also be negative.

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Answer:

Leading your people into the right direction, and always knowing what is best for  you and your people.

Explanation:

Answer:

57.91

Explanation:

The electric potential energy between the two charges is approximately 57.75 Joules.

To calculate the electric potential energy between two point charges, we can use the formula:

Electric potential energy (U) = k * |q1 * q2| / r

where:

k is Coulomb's constant ≈ 8.99 * [tex]10^9[/tex] N m²/C²

q1 and q2 are the magnitudes of the two charges (in Coulombs)

r is the distance between the charges (in meters)

Given:

q1 = 4.33 * [tex]10^(-6)[/tex] C

q2 = -7.81 * [tex]10^(-4)[/tex] C

r = 0.525 m

Now, let's calculate the electric potential energy (U):

U = (8.99 * [tex]10^9[/tex]  N m²/C²) * |(4.33  * [tex]10^(-6)[/tex]C) * (-7.81 * [tex]10^(-4)[/tex] C)| / 0.525 m

U = (8.99 * [tex]10^9[/tex]  N m²/C²) * |(-3.38 * [tex]10^(-9)[/tex] C²)| / 0.525 m

U = (8.99 * [tex]10^9[/tex]  N m²/C²) * 3.38 * [tex]10^(-9)[/tex] C² / 0.525 m

U = (3.03362 * [tex]10^1[/tex] N m²/C²) / 0.525 m

U ≈ 57.75 J

The electric potential energy between the two charges is approximately 57.75 Joules.

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Answer:

25N.s=25kgm/s

Explanation:

The resulting momentum in this case is equal to the impulse created by the force 5N during 5 seconds

ΔP=Force.time=F.t

    = 5x5=25kgm/s

Answer:d

Explanation:

A chemical reaction occurs when 2 white solids are stirred together. They turn into a slushy, white solid and the glass jar feels really cold. Energy is being Absorbed by the solids, which means this is an Endothermic reaction. Hence option B is correct.

Endothermic reaction is a reaction in which energy is absorbed from the surrounding in the form of heat. for example an ice cube takes energy from the surrounding and it melts to form liquid. In this melting of Ice energy is absorbed in the form of heat. In this process the phenomenon is going from high order(solid) to lower order(liquid), hence entropy is increasing in this case. Entropy is nothing but randomness of molecule.

Because of absorption of energy, change in enthalpy is negative.

Exothermic reaction is a reaction in which energy is released in the surrounding in the form of heat.  for example bursting of firecracker gives sound and heat energy and its temperature is greater than surrounding. In this process Energy is released in the surrounding. In this case entropy decreases( solidifying of water into ice is also example of endothermic reaction).

Because of release of energy, change in enthalpy is positive.

Hence option B is correct.

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Answer: The smallest effort = 300N

Explanation:

Using one of the condition for the attainment of equilibrium:

Clockwise moment = anticlockwise moments

900 × 1 = 3 × M

Where M = the weight of the strong man

3M = 900

M = 900/3 = 300N

Therefore, 300N is the smallest effort that the strongman can use to lift the goat

Answer:

Just over 300 N

Explanation:

Just over 300 N

Explanation: The goat is 1 meter from the fulcrum, and the strongman is 3 meters from the fulcrum. The mechanical advantage of the lever will be 3. The effort needed to lift the goat will be just over one-third the weight of the goat, in this case just over 300 newtons.

Answer:false

Explanation:

Atoms don’t always fission the same way. You saw three different possible fission reactions for U-235

Answer: F

Explanation:

Answer:

luminosity

Explanation:

Answer:

The answer would be B.) Luminosity.

Explanation:

The luminosity of a star is basically, as the question says, the total energy output of a star per second. The luminosity is also the brightness of a star. If a star has a lot of energy, the star would be bright.

The graph that correctly describes the car's acceleration as a function of time is (c).

The graph that correctly describes the car's acceleration as a function of time is (c). In this graph, the acceleration has a constant value for a certain time interval, indicating constant acceleration. The slope of the velocity vs. time graph is constant during this interval.

The moon orbiting the earth, an apple falling, or a car stopping at a traffic light are a few instances of acceleration. These illustrations help us to understand that acceleration happens when a moving object changes direction or experiences a speed increase or reduction.

The acceleration unit in the SI is metres/second2 (m/s2). Newton's Second Law, which states that "The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass," establishes a relationship between force (F), mass (m), and acceleration (g).

Answer:

flow of electric charges - current

opposition to the flow of an electric current - resistence

stored potential energy at the source of a circuit - voltag

Answer: C.

Water flowing through pipes

Explanation:

Convection current is a type of heat transfer that occurs in liquids and gases.

It involves the physical movements of liquids or gases molecules. Convection happens when there is a difference in temperature between two parts of a liquid or gas. In convention, hot part of a fluid rises, and the cooler part sinks

Answer:

C

Explanation:

Answer:

need help with this 2

Explanation:

pls hellp

Explanation:

Assuming the chair has four legs,

Area = (πr²)

        = 1.33 m²

Pressure = Force/Area

               = 827/1.33

               = 621.8 Pa

Answer:

Momentum of the bowling pin is 17kgm/s

Explanation:

P(initial of ball)=+30 kg m/s

P(initial of pin)=0  because its velocity is 0

P initial = P final

30= P(ball) + P(pin)

30=13+P(pin)

P(final of pin)=+13 kg m/s and P(final of ball)= 30-13=17kgm/s

The scenario involves conservation of momentum. The bowling ball transfers momentum to the pin during collision, and the final momentum of the bowling pin is calculated to be 17 kg m/s.

The scenario described in the question involves the principle of conservation of momentum. This principle, fundamental in physics, states that the total momentum of a system of objects is constant unless acted upon by an external force. Thus, the total momentum before the collision (initial momentum of the bowling ball) should equal the total momentum after the collision (final momentum of the bowling ball plus the momentum of the pin).

Given that the bowling ball has an initial momentum of +30 kg m/s and final momentum of +13 kg m/s, the momentum transferred to the pin is 30 kg m/s - 13 kg m/s = 17 kg m/s. This is the magnitude of the final momentum of the bowling pin.

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Answer:

Mechanical longitudinal waves are also called compressional or compression waves, because they produce compression and rarefaction when traveling through a medium, and pressure waves, because they produce increases and decreases in pressure.

Explanation:

Mechanical wave used to describe the compression of a longitudal wave.

Mechanical waves are longitudinal waves that generate compressions along the medium they are travelling and transmit energy from one medium to another location of medium.

Therefore, Mechanical wave used to describe the compression of a longitudal wave.

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A chisel, an axe, and a knife all include wedges in their design, as they have tapered edges that are used to cut, split, or pierce materials. A hairbrush does not serve this function and is not a wedge.

A wedge is a simple machine that consists of a piece of material, typically metal or wood, with a sharp edge that tapers to a point or edge. It converts force applied to its blunt end into forces perpendicular to its inclined surfaces. The wedge is used to cut, split, or pierce other objects or materials. Based on the information provided:

Examples of other non-listed tools that function as wedges could include a screwdriver for opening cans, a garden fork for piercing soil, or a pair of pliers for gripping and cutting.

Explanation:

The darker the object, the better it emits heat, because it's a better absorber of light. On the other hand, a white object appears white because it reflects all the different wavelengths and absorbs little to no light.

Answer: Absorption

Explanation: Because the darker clothing absorbs the heat more than the lighter clothing beacuse of contrast i guess . A P E X

The speed of the truck, given the frequency and the speed of sound would be 6.2 m/s

Given:

Fs = 500 Hz (source frequency)

Fo = 480 Hz (observed frequency)

v = 348 m/s (speed of sound)

Using the Doppler effect formula:

Fo = Fs × (v / (v + vs))

where vs is the source velocity (truck velocity), we can solve for vs:

480 = 500 × (348 / (348 + vs))

Simplifying and solving for vs:

0.96 = 348 / (348 + vs)

0.96(348 + vs) = 340

334.08 + 0.96vs = 340

0.96vs = 5.92

vs = 5.92 / 0.96

vs ≈ 6.2 m/s

Therefore, the truck is moving away from the observer at a speed of approximately 6.2 m/s.

Answer:

B

Explanation:

Answer:

Reduce the time required for work

Explanation:

Answer: [D] (Clarification: The one with the steepest incline)

Answer: A. 22 inches

Explanation:

I just took the test and 22 was the correct answer

Answer:

Infectious diseases can be spread through contaminated water. Some of these water-borne diseases are Typhoid, Cholera, Paratyphoid Fever, Dysentery, Jaundice, Amoebas and Malaria. Chemicals in the water also have negative effects on our health.

Explanation:

Final answer:

Water pollution adversely affects ecosystems, leading to harmful effects like eutrophication and dead zones. Pollutants can accumulate in the food chain affecting human health, and contaminated waterways can disrupt recreation and drinking water quality.

Explanation:

Water pollution has significant repercussions on ecosystems and can lead to broad ecological consequences, affecting water quality and the organisms residing in and around affected areas. Notably, the pollutants either from point sources or nonpoint sources can lead to a chain of detrimental events. An example of this is eutrophication, which is an over-enrichment of water bodies with nutrients leading to excessive growth of algae and subsequent depletion of oxygen (anoxia), causing harm to various aquatic species.

Furthermore, the pollution can result in the accumulation of harmful substances, like mercury, within the food web, which potentially leads to the consumption of carcinogens by animals—including humans. The effects of water pollution are far-reaching; contaminated rivers can negatively impact recreational activities, drinking water supplies, and the overall health of the ecosystem. Specific instances, such as the Cuyahoga River catching fire, underpin the urgent need for better water management policies to prevent such environmental crises.

Agricultural practices also contribute to water pollution with runoff carrying pesticides and fertilizers that can cause algal blooms, resulting in dead zones—areas in water bodies where life cannot be sustained due to low oxygen levels. These impacts are often not confined to a single locality but can affect regions downstream and ultimately contribute to global environmental problems.

Answer:

false

Explanation:

Answer:

i might be wrong but i think its

FALSE srry if im wrong TwT

Explanation:

The statement is false; temperature measures the average kinetic energy of gas molecules, whereas pressure is related to the force and frequency of collisions against the container's walls.

The statement that the temperature of a gas is a measure of how hard its molecules hit the walls of its container is false. Instead, the temperature of a gas is proportional to the average translational kinetic energy of the gas molecules.

When the kinetic energy increases, the molecules move faster, which could lead to harder impacts and more frequent collisions with the walls of the container, but the temperature itself does not directly measure impact force. Conversely, pressure of a gas is related to the frequency and force of the molecules colliding with the container walls. The more collisions and the harder they are, the higher the pressure. These collisions are the resultants of the gases’ kinetic energy and the volume available for the gas molecules to move around.

Answer: A or C

Explanation:

Answer:Well according to the formula :

Fg = G • m1 • m2

__________

r^2

If one were to increase the masses of the objects it will have a direct impact on the gravitational force as well, as it increase the gravitational force. It is directly proportional to mass.

Distance on the other hand is inversely proportional to the gravitational force, basically increasing the distance between two objects of substantial mass causes a decrease of attraction or gravitational force between those 2 bodies of mass.

Explanation:

Answer:

C) Sphere C because it is larger than A and closer than B.

Answer:

the answer is true

Explanation:

Both equations are derived from the density formula, hence it is TRUE that they are equal.

In order to know whether the two formulas are equivalent, we need to determine the formula for calculating the density of a substance

Density = Mass/Volume

D = m/V

Make V the subject of the formula

[tex]D = \frac{m}{V}\\DV = m\\[/tex]

Divide both sides by D

[tex]\frac{DV}{D} =\frac{m}{D}\\ V = \frac{m}{D}[/tex]

Since both equations are derived from the density formula, hence it is TRUE that they are equal.

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