If both the mass of a simple pendulum and its length are doubled the period will:_________

Answer:

0.02 is the count of vernier caliper.

Answer:

0.01 mm

A Vernier calliper scale can have a minimum count of 0.01 mm, while a micrometre can have a minimum count of 0.001 mm.

Answer:

a

Explanation:

cuz im smart ;)

When a star is so dense that its atoms have their electrons smashed in toward the nucleus (resulting in densities about a million times greater than water), the resulting material is called a Neutron star.

Stars are present in the galaxy that have the ability to generate their own light. They are both quite hot and very huge.

They are largely formed of hydrogen, with a trace of helium thrown in for good measure.

The sun is also a star, and its energy and light play an important part in the survival of all kinds of life on Earth.

When a star is so dense that its atoms have their electrons smashed in toward the nucleus (resulting in densities about a million times greater than water), the resulting material is called a Neutron star.

Hence the correct answer is a neutron star.

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Answer:

a. Vf = 39.24 [m/s]

b. Vf = 31.24 [m/s]

c. Vf = 47.24 [m/s].

Explanation:

To solve this problem we can use the following equation of kinematics. We have to keep in mind that the gravitational acceleration acts downwards, therefore when the rock falls towards the abyss it has the same direction of the acceleration and that is why the gravitational acceleration has a positive sign in the equation.

\(v_{f}=v_{o}+g*t\)

where:

Vf = final velocity [m/s]

Vo = initial velocity = 0 (when the rock is dropped)

g = gravitational acceleration = 9.81 [m/s²]

t = time = 4 [s]

a.

\(v_{f}=0+9.81*4\\v_{f}= 39.24 [m/s]\)

b.

In this particular situation, the acceleration will be taken as negative because the gravity is pointing in the opposite direction of the movement of the rock.

\(v_{f}=8-(9.81*4)\\v_{f}=-31.24[m/s]\)

The negative sign in the answer tells us that the rock no longer moves up instead it does downwards when 4 seconds have passed.

c.

\(v_{f}=8+(9.81*4)\\v_{f}=47.24[m/s]\)

In this model, the base-emitter junction is represented by a voltage source, Vbe, and a small resistor, Rpi, which represents the internal resistance of the base-emitter junction.

Therefore, we have shown that the input resistance between base and emitter, looking into the base, is equal to Rpi / (1 + Rpi / Rb), where Rb is the external base resistance and Rpi is the internal resistance of the base-emitter junction.

Using the T model for a bipolar junction transistor (BJT), the input resistance between the base and emitter, looking into the base, can be represented as r_π. In this model, r_π is the resistance across the base-emitter junction, and it plays a crucial role in determining the input impedance of the BJT.

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The speed at which waves in a train of waves move down a stretched wire can be determined by using two key factors: the number of waves that pass a point in one second, and the wavelength of the waves.

To find the speed of the waves, you need to use the equation: speed = frequency × wavelength.

First, let's define the frequency. The frequency of a wave is the number of waves that pass a given point in one second. It is measured in hertz (Hz). For example, if 5 waves pass a point in one second, the frequency would be 5 Hz.

Next, we need to determine the wavelength. The wavelength of a wave is the distance between two consecutive points of the same phase, such as two consecutive crests or two consecutive troughs. It is usually represented by the Greek letter lambda (λ) and is measured in meters (m).

Once you have the frequency and wavelength, you can calculate the speed of the waves using the equation mentioned earlier: speed = frequency × wavelength.

For example, if the frequency of the waves passing a point in one second is 5 Hz, and the wavelength is 2 meters, the speed of the waves would be 10 meters per second (5 Hz × 2 m = 10 m/s).

In summary, to find the speed at which waves in a train of waves move down a stretched wire, you need to know the frequency and wavelength of the waves. By multiplying the frequency by the wavelength, you can determine the speed of the waves.

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Answer: F = 102141N

Explanation: Newton's 2nd Law states that a force can change the motion of a body. The relation is given by

F = m.a

whose units are:

[F] = N

[m] = kg

[a] = m/s²

Jenny's car, at the moment of the break, had acceleration:

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

\(a=\frac{11}{0.14}\)

a = 78.57 m/s²

Then, Force is

F = 1300*78.57

F = 102141 N

Jenny's car experienced a force of magnitude 102141N.

Answer:

T = 292.4 N

Explanation:

For this exercise we must use the translational equilibrium condition

         ∑ F = 0

Since force is a vector magnitude, the easiest way

Since the angle between the two forces is 140, the angle from the vertical is half tea = 70

        cos θ = T_y / T

        sin θ = Tₓ / T

        T_y = T cos 70

        Tₓ = T sin 70

X axis

        Tₓ₁-Tₓ₂ = 0

        Tₓ₁ = Tₓ₂

Y axis  

        T_y + T_y - W = 0

        2 T cos 70 = W

        T = \(\frac{W}{2 \ cos 70}\)

let's calculate

        T = 200/2 cos 70

        T = 292.4 N

A body has weight 20N.

The force required to move the body vertically upward with an acceleration of 2 m/\(s^{2}\) can be found using Newton's second law, which states that force is equal to mass times acceleration.

The mass of the body can be found using the formula

Weight = mass × gravitational acceleration

Where gravitational acceleration is approximately 9.81 m/\(s^{2}\).

Therefore,

Mass = Weight / gravitational acceleration

Mass = 20 N / 9.81 m/\(s^{2}\) = 2.039 kg

Now, we can use Newton's second law to find the force required

Force = mass × acceleration

Force = 2.039 kg × 2 m/\(s^{2}\)= 4.078 N

Therefore, a force of 4.078 N is required to move the body vertically upward with an acceleration of 2 m/\(s^{2}\).

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Answer:

Look below :) Hope this helped. Please provide Brainliest, as reporters took all I had away. Thanks!

Explanation:

Kepler's family was Lutheran and he adhered to the Augsburg Confession a defining document for Lutheranism. However, he did not adhere to the Lutheran position on the real presence and refused to sign the Formula of Concord. Because of his refusal he was excluded from the sacrament in the Lutheran church. This and his refusal to convert to Catholicism left him alienated by both the Lutherans and the Catholics. Thus he had no refuge during the Thirty-Years War.

The Holy Roman Empire of German Nationality at the Time of Kepler

The Holy Roman Empire of German Nationality at the Time of Kepler.

In 1612 Lutherans were forced out of Prague, so Kepler moved on to Linz. His wife and two sons had recently died. He remarried happily, but had many personal and financial troubles. Two infant daughters died and Kepler had to return to Württemburg where he successfully defended his mother against charges of witchcraft. In 1619 he published Harmonices Mundi, in which he describes his "third law."

In spite of more forced relocations, Kepler published the Epitome Astronomiae in 1621. This was his most influential work and discussed all of heliocentric astronomy in a systematic way. He then went on to produce the Rudolphine Tables that Tycho had envisioned long ago. These included calculations using logarithms, which he developed, and provided perpetual tables for calculating planetary positions for any past or future date. Kepler used the tables to predict a pair of transits by Mercury and Venus of the Sun, although he did not live to witness the events.  

Johannes Kepler died in Regensburg in 1630, while on a journey from his home in Sagan to collect a debt. His grave was demolished within two years because of the Thirty Years War. Frail of body, but robust in mind and spirit, Kepler was scrupulously honest to the data.

Short Biography -|- Kepler's Firsts -|- Kepler's Laws -|- People and Events in Kepler's Time -|- Articles

Biographies and books -|- Web Sites -|- IYA Kepler

A List of Kepler's Firsts

First to correctly explain planetary motion, thereby, becoming founder of celestial mechanics and the first "natural laws" in the modern sense; being universal, verifiable, precise.

In his book Astronomia Pars Optica, for which he earned the title of founder of modern optics he was the:

First to investigate the formation of pictures with a pin hole camera;

First to explain the process of vision by refraction within the eye;

First to formulate eyeglass designing for nearsightedness and farsightedness;

First to explain the use of both eyes for depth perception.

The net rates of reaction for all components and the expression for instant selectivity are determined. The concentration of P over time in a batch reactor is derived, and the conditions for maximum concentration of P are discussed based on the rate-determining step.

a. The net rate of reaction for component A is given by -11 = -0.025 mol of A/(L.min), as it is a zero order reaction. The net rate of reaction for component P is given by -12 = K2 * Cp = 0.0075 CP mol of P/(L.min), as it is a first order reaction. The net rate of reaction for component B can be calculated by considering the stoichiometry of the two steps.

The instant selectivity is the ratio of the net rate of production of P to the net rate of consumption of A, which can be expressed as selectivity = -12 / -11.

b. Based on material balances for a batch reactor, the rate of change of concentration of P over time (dCp/dt) can be expressed as (dCp/dt) = -2 * (-12) = 0.015 CP mol/(L.min), using the stoichiometry of the reaction.

c. To determine the conditions for maximum concentration of P, we need to consider the rate-determining step. Since the second step is first order, it determines the overall rate of the reaction. To maximize the concentration of P, we need to maximize the rate of the second step. This can be achieved by increasing the concentration of P or the concentration of B while keeping the other reactants at their initial concentrations.

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Answer:According to Coulomb's law, the electrostatic force between two bodies is proportional to the product of their two charges. If the charge on A is increased this product increases in size (it must have been non-zero to begin with, since there was a force between them at first). Thus, the force between them rises.

Explanation:

Answer:

Velocity = 6.89 m/s

Explanation:

The equation for momentum: \(Momentum=(Mass)(Velocity)\)

Substitute the given information into the equation and solve for velocity.

\(239.5=34.75(Velocity)\\\frac{239.5}{34.75}=\frac{34.75(Velocity)}{34.75\\}\\6.89=Velocity\)

Answer:

D) the sum of the kinetic energy and the internal energy is conserved

Explanation:

When  soft deformable objects such as two balls of putty collide, their total energy will be conserved , according to law of conservation of energy .

Their energy involves kinetic energy and potential energy . Their kinetic energy is due to their motion . Their potential energy is due to their shape . If there is change in their shape , there will be change in their potential energy .

Their internal energy consists of potential energy and thermal energy . Due to collision , heat will be produced so their thermal energy will also change . In this way there will be change in their internal energy .

But in spite of all these changes , total energy will be conserved . That means if one form of energy is reduced , the other kind will be increased  and so on.

Hence  the sum of the kinetic energy and the internal energy is conserved

Answer:

0m/s^2

Explanation:

have a beautiful day ahead

Answer:

Approximately \(7.2\; {\rm m\cdot s^{-1}}\) (rounded up), assuming that this circle is vertical and \(g = 9.81\; {\rm m\cdot s^{-2}}\).

Explanation:

Let \(v\) denote the tangential speed of the ball, and let \(r\) denote the radius of the circle. Since the ball is in a circular motion, the acceleration on this ball would be equal to the centripetal acceleration \(a = (v^{2} / r)\). The net force on this ball would be \(F_{\text{net}} = m\, a = (m\, v^{2} / r)\).

The net force on this ball is also the vector sum of the tension \(T\) in the rope and the weight of the ball \(m\, g\):

\(F_{\text{net}} = (\text{weight}) + T\).

\(T = F_{\text{net}} - (\text{weight})\).

Note that:

\(\| T \| = \|F_{\text{net}} - (\text{weight})\| \le \|F_{\text{net}} \| + \| (\text{weight})\|\).

In other words, the magnitude of tension \(T\) is at most equal to \(\|F_{\text{net}} \| + \| (\text{weight})\| = (m\, v^{2} / r) + (m\, g)\), which happens when weight and net force are in opposite directions.

When the speed of the ball is maximized, the magnitude of tension \(T\) would be at the largest possible value of \(130\; {\rm N}\). Rearrange the equation and solve for speed \(v\):

\(\displaystyle \frac{m\, v^{2}}{r} + m\, g = \|T\|\).

\(\begin{aligned}v^{2} = \frac{r}{m}\, (\|T \| - m\, g) = \frac{r\, \|T\|}{m} - r\, g\end{aligned}\).

\(\begin{aligned}v &= \sqrt{\frac{r\, \|T\|}{m} - r\, g} \\ &= \sqrt{\frac{(1.2)\, (130)}{2.5} - (1.2)\, (9.81)}\; {\rm m\cdot s^{-1}} \\ &\approx 7.2\; {\rm m\cdot s^{-1}}\end{aligned}\).

Answer:

136 N

Explanation:

Weight can be calculated by multiplying mass and acceleration due to gravity. The equation is formed as \(\displaystyle{W=mg}\).

We know that her weight is 800 N on Earth and that acceleration due to gravity on Earth is given in the chart as 9.81 m/s². We will be finding her mass so we can find her weight on the moon.

\(\displaystyle{800 = m\cdot 9.81 }\\\\\displaystyle{m=81.55}\)

Therefore, her mass is approximately 81.55, now we find her weight on the moon.

\(\displaystyle{W=81.55\cdot 1.67}\\\\\displaystyle{W\approx 136 N}\)

Therefore, her weight on the moon is close to 136 N.

The slope of the line ploted, passing through points (0.3) and (3,-3) is -2.

Slope is simply expressed as change in y over the change in x.

Slope m = ( y₂ - y₁ )/( x₂ - x₁ )

Given the coordinates of the points in the graph.

Point 1 (0,3)

Point 2 (3,-3)

Plug the given x and y values into the slope formula and simplify.

Slope m = ( y₂ - y₁ )/( x₂ - x₁ )

Slope m = ( -3 - 3 )/( 3 - 0 )

Slope m = ( -6 )/( 3 )

Slope m = -6 / 3

Slope m = -2

Therefore, the slope of the line is -2.

Option C) -2 is the correct answer.

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Answer:

c

Explanation:

London dispersion forces are weak intermolecular forces and are considered van der Waals forces. Temporary dipoles can occur in non-polar molecules when the electrons that constantly orbit the nucleus occupy a similar location by chance.

Answer: false

Explanation: because if one car is at 2 m/s and the other at 1 m/s one would be farther away from the stating point

Option b. The total mechanical energy used skating down this hill to the nearest whole number is 2516 J.

To take care of this issue, we can utilize the rule of protection of energy, which expresses that the complete mechanical energy of a framework stays steady in the event that there are no outer powers following up on it. At the highest point of the slope, the skater has potential energy equivalent to mgh, where m is the mass, g is the speed increase because of gravity, and h is the level of the slope. Consequently, the likely energy of the skater at the highest point of the slope is 60 kg × 9.8 m/s² × 3 m = 1764 J.

At the lower part of the slope, the skater has both dynamic energy and expected energy. Since the speed is given, we can ascertain the dynamic energy utilizing the condition KE = 0.5mv², where v is the speed. Accordingly, the dynamic energy of the skater at the lower part of the slope is 0.5 × 60 kg × (5 m/s)² = 750 J.

Since there is no erosion referenced in the issue, we can expect that the all out mechanical energy is saved. Subsequently, the absolute mechanical energy utilized skating down the slope is the amount of the potential and active energy, which is 1764 J + 750 J = 2514 J. Adjusted to the closest entire number, the response is 2516 J. Thusly, the right response is 2516 J.

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Answer:

I think the answer is a because boiling water cleans it

Boiling the water away, leaving the substance behind in the beaker is the way to separate the mixture. The correct option is A.

A mixture is basically a substances comprised of two or many distinct chemical substances which are indeed not linked covalently.

A mixture is the usually physical combination of two or more substances that retain their identities as well as are mixed in the way to form solutions, suspensions, along with colloids.

When two or more distinct substances are physically combined, a mixture is formed that can be distinguished back into its original substances.

When two or more substances combine to form a new substance that cannot be separated back into its original substances, a chemical reaction occurs.

The mixture can be separated by boiling the water away and leaving the substance in the beaker.

Thus, the correct option is A.

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Answer:

Chocolate is poisonous to dogs mostly because of its theobromine content, which dogs are unable to metabolize effectively. If your dog eats chocolate, you should monitor them closely and seek veterinary attention if they show any symptoms, or if they are very young, pregnant or have other health concerns.

Explanation:

While this depends on the type of chocolate, it can take only 0.3 ounces of concentrated chocolate per pound of body weight to kill a dog. Milder types of chocolates vary from 0.5 to 2 ounces. This is because chocolates contain theobromine, which is a lethal chemical for dogs.

Symptoms of chocolate poisoning will usually show within six to 12 hours, but could appear within one hour. If you know your dog has eaten chocolate, act immediately and don't wait for the signs to appear. We always recommend seeking veterinary advice if you have any concerns about the health of your pets.

Yes, chocolate is toxic to dogs. While rarely fatal, chocolate ingestion can result in significant illness. Chocolate is toxic because it contains a chemical called theobromine, as well as caffeine.

The high level of theobromine in dark chocolate means it takes only a very small amount to poison a dog. Less than an ounce of dark chocolate may be enough to poison a 44-pound dog. Cocoa, cooking chocolate and dark chocolate contain the highest levels, while milk chocolate and white chocolate have the lowest.

Eventually, the dog may develop convulsions and die. In the majority of cases, the symptoms occur within a few hours, but it has been known to be delayed for as long as 24 hours. It can take as long as three days for the dog to recover completely.

ik its late but i hope this helps

Analy4life

Answer:

Chocolate can be toxic to dogs because it contains a substance called theobromine, which is similar to caffeine. While humans can easily metabolize theobromine, dogs metabolize it much more slowly, which can lead to a buildup of the toxin in their system. Theobromine can cause a variety of symptoms in dogs, including vomiting, diarrhea, increased heart rate, seizures, and even death in severe cases.

The severity of the symptoms depends on the amount of chocolate ingested, as well as the size and weight of the dog. Dark chocolate, baking chocolate, and cocoa powder contain higher levels of theobromine than milk chocolate or white chocolate, so they are more dangerous to dogs. As a general rule, it's best to keep all types of chocolate away from dogs, and to seek veterinary care immediately if you suspect your dog has ingested chocolate.

The answers are (a) velocity, v=2.8m/s , mass, m=0.0038kg and x=0.055m.

(b) v=2.7m/s.

Any object or system that has stored energy as a result of its position or component arrangement is said to have potential energy. Nevertheless, it is unaffected by external factors like air pressure or altitude. On the other hand, kinetic energy is the force that propels a moving object or group of particles.

(a) By equating the compressed spring's potential energy to the cork's kinetic energy at release, we have

The formula is :

k = \(\frac{1}{2} mv^2\)

v = \(\sqrt{\frac{2k}{m} }\)

And potential energy of spring = \(\frac{1}{2}mx^2\)

On equating these two equations we get ;

v = x\(\sqrt{\frac{k}{m}\)

After substituting the value of x = 5.5 cm and m = 3.8g we would get

v=2.8m/s m=0.0038kg and x=0.055m.

(b) In the novel scenario, there is some potential energy present just before release. Energy conservation changes when d=0.015m.

Similarly solving the question we get :

v = 2.7 m/s

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Imani is likely to be receiving Transcranial Magnetic Stimulation (TMS) treatment.

Magnetism is a physical quality mediated by a magnetic field that refers to the ability to create attracted and repulsive occurrences in other substances. Diamagnetic materials are those that magnetize freely when put in a magnetic field. However, the magnetization is oriented in the opposite direction as the magnetic field. These materials' magnetism is referred to as diamagnetism. Magnetism is a component of the broader phenomenon of electromagnetic. The most well-known effects occur in ferromagnetic materials, which are highly attracted by magnetic fields and may be magnetized to become permanent magnets, hence creating magnetic fields. It is also feasible to demagnetize a magnet.

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Answer:

hope helps

Explanation:

In a weightless environment a force of 5 Newtons is applied horizontally to the right on a rock with a mass of 1 kg and to a pebble with a mass of 0.1 kg.

Answer: 2km/m/s/s

Explanation:

10km divided by 5m/s/s = 2km/m/s/s

Jess wants to make her house more energy efficient. Insulating her loft, which will cost £460 and save £25 per year, is better long-term option. Therefore, option B is correct.

In order to accomplish work and to produce heat and light, energy must be transferred to a body or to a physical system. Energy is the quantitative attribute that does this. Energy is a preserved resource; according to the rule of conservation of energy, energy can only be transformed from one form to another and cannot be created or destroyed.

Computers, vehicles, communications, state-of-the-art medical technology, and many other things are all powered by energy. The demand for dependable and economical energy is especially pressing for emerging countries. It may enhance things or perhaps save lives.

A turbine generator set transforms mechanical energy into electrical energy to produce electricity. Natural gas, coal, nuclear fission, biomass, petroleum, geothermal, and solar thermal are examples of energy sources where the heat generated is used to produce steam.

Thus, option B is correct.

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Apply third equation of kinematics

\(\\ \tt\hookrightarrow v^2-u^2=2as\)

\(\\ \tt\hookrightarrow (50)^2=2(200)(8)\)

\(\\ \tt\hookrightarrow 2500=16(200)\)

\(\\ \tt\hookrightarrow 200=2500/16\)

\(\\ \tt\hookrightarrow 200>156.25\)

Unfortunately the car cannot make it through

Answer:

No. The car could not make through the light.

Explanation:

Formula: \(s=ut+\frac{1}{2} at^{2}\)

where s is displacement, u is initial velocity, a is acceleration, t is time

Using the formula:

Distance: 50 * 3 + 1/2 * 8 * 3²

              : 186 meters

The car could not make it through.

Therefore, d = (v0/3)√(r/g), where d is the distance in terms of r.

Distance is a scalar quantity as a result. The entire journey that an object has taken can be used to define distance. An illustration. If an automobile drives 5 km east, then turns and drives 8 km further north, the total distance driven by the car is 13 km.

Using the motion's vertical component:

v² = u² + 2as

0 = (v0/2)² - 2gr/2

r = v0²/8g

v² = u² + 2gh

v²= 2gh

v = √(2gh) = √(2gr)

The momentum of the shell before the explosion was:

p = mv0

After the explosion, the momentum of the smaller piece is:

p1 = 15mv

The momentum of the larger piece can be found using conservation of momentum:

p2 = (45m)(-v) = -45mv

p1 + p2 = p

15mv - 45mv = mv0

v = v0/3

Therefore, the larger piece lands a distance d from the mortar:

d = vt = (v0/3)t

The time it takes for the smaller piece to land can be found using:

t = √(2h/g) = √(r/g)

Therefore, the distance d in terms of r is:

d = (v0/3)√(r/g).

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