(6.0 x 10^-5)(3.0 x 10^8)

Answer: 2 i think

Explanation:

Answer:Im pretty sure its the second one because sound sometimes bounces back and that causes echo and it doesnt travel in one line or direction

Explanation:

Answer:

I know I'm late but...

Explanation:

A mixture is the combination of two or more substances together. And I'm pretty sure that a mixture has no chemical substances. And mixtures can be physically separated.

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Answer:A. argon(Ar)

Argon is commonly considered to be a chemical by most people

Answer:

Yes

Explanation:

Because putting them together would make a type of energy making the answer yes

Answer:ummm ok

Explanation:I really don’t get it but ok

Answer:

so what do we need to do

Explanation:

A diffraction grating can be a reflection grating or a transmission grating. Plane grating and concave grating are two types of gratings.

The most common type of diffraction grating are plane gratings and concave gratings although they can also be other biographies similar as convex or toroidal depending on the operation.

The advantage of a concave grating over a plane grating is its capability to produce sharp spectral lines without the aid of lenses or fresh glasses. This makes it useful in the infrared and ultraviolet regions in which these radiations would else be absorbed upon passage through a lens.

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The hydrometer reading for a fully charged battery provides an indication of the battery's electrolyte density, which is measured as specific gravity.

Specific gravity is the ratio of the density of a substance to the density of a reference substance, typically water. In the context of batteries, the specific gravity of the electrolyte can be measured using a hydrometer.

A fully charged battery typically has a specific gravity reading in the range of 1.265 to 1.280, or 12.6 to 12.8 on the hydrometer scale. This range may vary slightly depending on the type and manufacturer of the battery. The specific gravity reading is directly related to the concentration of sulfuric acid in the battery electrolyte.

During the charging process, chemical reactions occur within the battery, converting lead plates and lead dioxide plates into lead sulfate. This reaction increases the concentration of sulfuric acid in the electrolyte, resulting in a higher specific gravity reading.

When a battery is fully charged, the specific gravity reading reaches its maximum value because the concentration of sulfuric acid is at its highest. This indicates that the battery has stored the maximum amount of energy possible and is in optimal condition.

However, it's worth noting that newer maintenance-free batteries or sealed batteries may not have easily accessible electrolyte for measurement with a hydrometer. In such cases, other indicators such as voltage readings or battery health indicators provided by the manufacturer may be used to determine the battery's charge level.

It's essential to consult the battery manufacturer's guidelines or specific battery documentation to obtain accurate hydrometer readings for a fully charged state. This ensures proper maintenance and monitoring of the battery's health and performance.

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Space telescopes like Hubble and Chandra provide vital data on distant stars and galaxies.

Space-based telescopes, particularly those designed for observations across various wavelengths, provide crucial data for advancing our understanding of distant stars and the universe. Among them, the Hubble and Chandra telescopes are major contributors to this field.

1. Hubble Space Telescope:  The Hubble Space Telescope captures images and data about distant stars, enabling astronomers to study their lifecycle, characteristics, and evolution, as well as explore star-forming regions and galaxy dynamics. Its deep-field observations have also provided remarkable insights into the early universe and distant galaxies.

2. Chandra X-ray Observatory: The Chandra X-ray Observatory is designed to detect and analyze X-ray emissions from celestial objects, providing crucial insights into high-energy processes and phenomena associated with stars, such as supernovae and black holes. Chandra's observations have greatly contributed to our understanding of stellar evolution, X-ray binary systems, and other X-ray sources both within and beyond our galaxy.

Therefore, Important information on far-off stars and galaxies is provided by space telescopes like Hubble and Chandra.

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Answer:

Explanation:

Gain  of kinetic energy + work done by friction = loss of potential energy

= 1 / 2 m ( 25² - 8² ) + work done by friction = m x 9.8 x ( 12 + 12 )

= .5 x 100 x ( 625 - 64 ) + work done by friction = 100 x 9.8 x 24

28050 + work done by friction = 23520

work done by friction = -4530 J

12). When you move your hand or foot, your body has converted potential energy into kinetic energy.

13). When coasting while roller skating, you eventually stop due to

friction causes kinetic energy to transfer to thermal energy.

14).  A ball has 100 J of potential energy when it is on a shelf. The kinetic energy of the ball the instant it hits the floor is Kinetic increases, potential decreases.

Kinetic energy is the force that propels motion, which can be seen in the movement of a particle, an object, or a group of particles. A person walking, a baseball being thrown, a piece of food falling from a table, and a charged particle in an electric field are all examples of objects in motion that use kinetic energy.

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We are given that:

We need to find:

Using equations of motion:

➙ v² - u² = 2as

➙ v = u + at

here,

From the given information, we can conclude that:

Now, using equation of motion:

➝ v = u + at

➝ v = 0 + ( 8 × 1.5 )

➝ v = 0 + 12 .0

➝ v = 12 m/s

For, acceleration :

➝ v² - u² = 2as

➝ ( 12 )² - ( 0 )² = 2 × 8 × s

➝ 144 - 0 = 16s

➝ 16 s = 144

➝ s = 144 / 16

➝ s = 9m

\( \dag\) Since, we take displacement in terms of distance in some places, therefore we can say that the height from which the object was dropped is 9 meters .

Answer:

C

Explanation:

The rock takes 8.16s to return to its release point. Given that the elastic band provides a speed of 40m/s to the rock in 10 cm stretch.

Initial speed of the rock, u = 40m/s

Final position of the rock s = 0m taking the release point as reference. The rock takes 8.16s to return to its release point. Given that the elastic band provides a speed of 40m/s to the rock in 10 cm stretch.

Nuclear energy is a useful source of power but has disadvantages. The disadvantage of nuclear energy is it produces dangerous waste.

Initial speed of the rock, u = 40m/s

Final position of the rock s = 0m taking the release point as reference

From the second equation of motion:

solving above we get:

t = 0s or t = 8.16s,  t =0  seconds is neglected since it represents the initial position which is the same as the final position at t = 8.16s

So, the rock takes 8.16 seconds to return to the release point.

Therefore, The rock takes 8.16s to return to its release point. Given that the elastic band provides a speed of 40m/s to the rock in 10 cm stretch.

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Answer:

a. 15,000J

b. .76m

Explanation:

KE = (1/2)m*v²

KE = .5*1000kg*30m/s

KE = 15000J

PE = m*g*h

7500J = 1000kg*9.81m/s²*h

7500J = 9810*h

h = .76m

The ranking of given scenarios on the basis of the linear speed of block is: C > E > A = B = D > F

A pulley is a wheel on an axle or shaft designed to assist in the movement and change of direction of a tensioned cable or belt, or in the transmission of power between a shaft and a cable or belt.

Whether belts, cables or chains, all cable pull systems work according to the same principle. For example, the speed of all pulleys in a pulley system can be calculated by taking the ratio of the diameters of each pulley.

Linear speed (v) ∝ R inner/R outer

So, the higher the value of ratio, higher will be the speed.

Let's calculate the R inner/R outer ratios for each case:

A) 0.4/0.8 = 0.5

B) 0.1/0.2 = 0.5

C) 0.5/0.6 = 0.83

D) 0.2/0.4 = 0.5

E) 0.3/0.4 = 0.75

F) 0.2/0.6 = 0.33

The speed in highest in case C, whereas it is lowest in case F.

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The complete question is as follows:

The pulley in (figure 1) represents different pulleys that are attached with outer radius and inner radius indicated in the table. the horizontal rope is pulled to the right at a constant linear speed that is the same in each case, and none of the two separate ropes slips in its contact with the pulley.

A) R outer = 0.8m; R inner = 0.4m

B) R outer = 0.2m; R inner = 0.1m

C) R outer = 0.6m; R inner = 0.5m

D) R outer = 0.4m; R inner = 0.2m

E) R outer = 0.4m; R inner = 0.3m

F) R outer = 0.6m; R inner = 0.2m

Rank these scenarios on the basis of the linear speed of block.

Answer:

increases your heart rate

Explanation:

Warming up increases your heart rate and therefore your blood flow which enables more oxygen to reach your muscles.

Here,

Resistance = 11.7

Ampere = 0.3

Voltage = ?

Now,

R = V/A

11.7 = V/0.3

11.7*0.3 =V

V = 3.51

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Explanation:

The reason for this phenomenon is the due to the condition by which each type of rocks form.

A sedimentary rock is formed by the compaction and lithification of sediments within a basin.

A metamorphic rock forms under high temperature and pressure conditions which alters the minerology of a rock.

Answer:

The heat and pressure of metamorphism would deform the fossil, and the process of melting would destroy the fossil completely.

Explanation:

PLATO

Answer:D 1.7

Explanation:

Just trust me

Answer:

5’10” = 1.778 = 1.8m

D

Explanation:

When physicists find a quantity that does not change, they say that the quantity is conserved. Conservation laws are fundamental to physics, and they are based on the principle of the conservation of energy, mass, and momentum. These laws state that these quantities cannot be created or destroyed, only transferred from one system to another.

For example, the law of conservation of energy states that the total energy of a closed system remains constant over time, meaning that energy cannot be created or destroyed, only transferred from one form to another. This principle applies to all forms of energy, including thermal, kinetic, potential, and electromagnetic. The conservation of mass and momentum are also essential principles in physics, which state that the total mass and momentum of a closed system remain constant over time. The concept of conservation is critical in physics because it allows us to predict and understand the behavior of physical systems and the laws that govern them.

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Fluid friction requires less force to overcome than sliding friction. Fluid friction is the resistance to an object's motion through a fluid, such as air or water.

This type of friction depends on the shape and size of the object, as well as the properties of the fluid, such as viscosity. In general,

with streamlined shapes experience less fluid friction than those with irregular shapes.

Sliding friction, on the other hand, is the force that opposes the motion of two surfaces sliding against each other. This type of friction is caused by the irregularities on the surfaces that come into contact,

which resist the motion of one surface over the other. Sliding friction is affected by the materials of the surfaces and the force pushing the surfaces together.

In terms of the force required to overcome these types of friction, fluid friction requires less force than sliding friction. This is because fluid friction depends on the object's shape and size,

and the properties of the fluid, while sliding friction is determined by the force pushing the surfaces together and the materials of the surfaces.

Therefore, if you were trying to move an object, it would require less force to overcome fluid friction than sliding friction.

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During sewer pipe installation using a laser, a laser beam is projected through the pipe until it hits a target beam(c).

The target beam acts as a reference point or marker that helps align the pipe correctly during installation. By hitting the target beam, the laser beam indicates the desired direction and position for the pipe, ensuring accurate installation.

The target beam is often placed at the other end of the pipe or at specific intervals along the pipe's path, allowing the construction crew to adjust the alignment and slope as necessary. This process helps ensure the proper installation of the sewer pipe, minimizing potential issues and ensuring efficient drainage.

So c is correct option.
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Answer:

D. sympathetic

Explanation:

When a charge is placed a distance from another charge, the magnitude of the force between them is inversely proportional to the square of the distance between them. If the distance between the charges is reduced to half, then the force between them will increase four times its original magnitude.

This is because the electric force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them, according to Coulomb's law. The equation for Coulomb's law is: \($$F = \frac{kq_1q_2}{r^2}$$\)Where F is the force between the two charges.

The equation shows that as the distance between two charges decreases, the force between them increases. If the distance between the two charges is halved, the force between them quadruples. Therefore, when the distance between two charges is reduced to half.

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The same-side exterior angles are not congruent, they are supplementary. The same side exterior angles are formed and they have a sum of 180 degrees.

Congruent refers to having the same precise size and shape. Even if we flip, turn, or rotate the forms, their shape and size need to remain constant. If it is possible to superimpose one geometric figure onto the other such that they correspond throughout, then the two are said to be congruent, or to be in the relation of congruence.

In general relativity, a congruence (more precisely, a congruence of curves) is the collection of integral curves of a (never vanishing) vector field in a four-dimensional Lorentzian manifold that is used to physically represent spacetime.

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Answer:

Explanation:

F = ma and

\(a=\frac{v}{t}\)

We have F, we have m, but in order to solve for v, we need a.

30.0 = 3.00a so

a = 10.0 m/s/s. Plug that in for a in the second equation and solve for v:

\(10.0=\frac{v}{3.00}\) so

v = 10.0(3.00) so

v = 30.0 m/s

Answer:

t = 2.55 s

Explanation:

Given that,

Height from which the baseball is thrown, h = 155 m

Initial velocity of the baseball, u = -25 m/s

We need to find the time taken by it to reach the ground. Let the time is t. Using equation of kinematics to find it as follows:

\(v=u+at\\\\t=\dfrac{v-u}{a}\\\\t=\dfrac{0-(-25)}{9.8}\\\\t=2.55\ s\)

So, it will take 2.55 seconds to reach the ground.

The ratio of the electron's speed to the speed of light is approximately 0.859.

According to special relativity, the total relativistic energy of a particle is given by the equation:

E = γmc^2

where E is the total energy of the particle, m is its rest mass, c is the speed of light in a vacuum, and γ is the Lorentz factor, which is defined as:

γ = 1 / sqrt(1 - (v^2 / c^2))

where v is the velocity of the particle.

Given that the final kinetic energy of the electron is 2.35 MeV, we can equate this energy to the relativistic energy equation:

E = γmc^2

Rearranging the equation to solve for γ:

γ = E / (mc^2)

The rest mass of an electron, m, is approximately 9.10938356 × 10^-31 kg, and the speed of light, c, is approximately 2.998 × 10^8 m/s.

Converting the final kinetic energy of the electron from MeV to joules:

2.35 MeV = 2.35 × 10^6 × 1.6 × 10^-19 J

= 3.76 × 10^-13 J

Substituting the values into the equation for γ:

γ = (3.76 × 10^-13 J) / ((9.10938356 × 10^-31 kg) × (2.998 × 10^8 m/s)^2)

Simplifying the equation:

γ ≈ 4.18 × 10^8

To find the ratio of the electron's speed to the speed of light, we can use the equation:

v / c = sqrt(1 - (1 / γ^2))

Substituting the value of γ:

v / c = sqrt(1 - (1 / (4.18 × 10^8)^2))

Simplifying the equation:

v / c ≈ 0.859

Therefore, the ratio of the electron's speed to the speed of light is approximately 0.859.

Using special relativity, the ratio of the electron's speed to the speed of light is approximately 0.859.

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