A 1.00-kg block of copper at 20.0°C is dropped into a large vessel of liquid nitrogen at 77.3K . How many kilograms of nitrogen boil away by the time the copper reaches 77.3K ? (The specific heat of copper is 0.0920 cal/gc°C , and the latent heat of vaporization of nitrogen is 48.0 cal/g . )

Therefore, the equation of the sine function with an amplitude of 3 and a period of 6π is f(x) = 3 × sin((1÷3)x).

The equation of a sine function with an amplitude of 3 and a period of 6π can be written as:

f(x) = A × sin(Bx)

where:

A represents the amplitude (A = 3 in this case)

B represents the frequency or angular frequency (B = 2π ÷ period = 2π ÷ (6π) = 1÷3)

Substituting the given values, we have:

f(x) = 3 × sin((1÷3)x)

Therefore, the equation of the sine function with an amplitude of 3 and a period of 6π is f(x) = 3 × sin((1÷3)x).

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Answer:

The energy that will go will for thermal store of the surroundings is 20 J.

Explanation:

Given;

kinetic of the thrown ball, K.E₁ = 50 J

kinetic energy used to move the target, K.E₂ = 30 J

The excess energy that will go will for thermal store of the surroundings;

ΔK.E = K.E₁ - K.E₂

ΔK.E = 50J - 30J

ΔK.E = 20 J

Therefore, the energy that will go will for thermal store of the surroundings is 20 J.

Answer: when water flows on the earths surface

Explanation:

Answer:

the answer is 374.15 kelvins

Answer:

C

Explanation:

Earth would be the answer. pluto is slowest. then Saturn, Jupiter, mars

Answer:

True

Explanation:

The main differences between a physical property and a chemical property are mentioned below:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points.

While A chemical property describes the ability of a substance to undergo a specific chemical change.

Answer:

6m/s²

Explanation:

Given parameters:

Initial velocity  = 4m/s

Time  = 3s

Final velocity  = 22m/s

Unknown:

Average acceleration  = ?

Solution:

Acceleration is the rate of change of velocity with time taken.

    Acceleration  = \(\frac{Final velocity - Initial velocity }{Time}\)  

Acceleration  = \(\frac{22 - 4}{3}\)    = 6m/s²

The equation of motion for a system of n-particles can be written as fi = miai = mag, where ag indicates Acceleration of the center of mass of the system

Systems of particles can be added to the equation of motion. This covers the movement of systems made up of solids, liquids, or gases.  There are internal and external forces acting on the system, much like in static  What distinguishes them from one another ia that Assuming that m = summation mi represents the sum of all particle masses and that aG represents the acceleration of the center of mass G of the particles, we can deduce that maG = mi ai, due to this equation of the motion of n -particles can be written

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The tube with the highest lipase activity is Tube B.

To determine the tube with the highest lipase activity, we need to compare the conditions and factors that can influence lipase activity in each tube. Lipase is an enzyme responsible for the hydrolysis of fats into fatty acids and glycerol.

In Tube A, lipase activity is affected by the pH level. Lipase functions optimally at a pH of around 7 to 8. If the pH in Tube A is within this range, it would support lipase activity.

In Tube B, lipase activity is influenced by both the pH level and temperature. Lipase enzymes generally have an optimum temperature at which they exhibit maximum activity. To calculate lipase activity, we need to compare the pH and temperature conditions in each tube.

Let's assume that the pH in both tubes is within the optimal range for lipase activity (pH 7 to 8). However, if Tube B is maintained at a higher temperature than Tube A, it will likely have a higher lipase activity. Lipase activity generally increases with temperature until it reaches an optimum point, beyond which it decreases.

Based on the assumption that the pH is within the optimal range in both tubes, Tube B is expected to have the highest lipase activity if it is maintained at a higher temperature than Tube A. It is essential to note that other factors, such as substrate concentration and the presence of inhibitors or activators, can also affect lipase activity. Therefore, the conclusion is based on the given information about pH and temperature.

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Answer:

\(resolving \: \\ (\downarrow_{ + }) \: s = ut + \frac{1}{2} g {t}^{2} \\ u = 0 ,\: g = 9.81m. {s}^{ - 2} , \: t = 5s \\ s =h= \frac{1}{2} g {t}^{2}, = \frac{1}{2} (9.81){5}^{2}\\=4.9\times25 \\ h=122.6m\)

The theoretical efficiency is greater than that of the actual efficiency of the engine. This is because heat engine always produces some waste heat.

The Second Law of Thermodynamics states that a heat engine cannot be 100% efficient. In practice, a heat engine is only 100% efficient when it is operating at about 30-50% efficiency.

If we were to multiply this by 100, we would get the efficiency as a percent: 49%. This is the theoretical maximum efficiency. If we were to actually build an engine, it would be less efficient than the theoretical engine. The theoretical engine that can achieve this theoretical maximum efficiency is called the Carnot Engine.

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A one-time pad is a type of encryption that is completely unbreakable if it is done correctly. It works by generating a random key that is at least as long as the message being encrypted. The key is then combined with the message using an XOR operation.

This produces a ciphertext that cannot be decrypted without the key. The key is used only once and then discarded, hence the name "one-time pad". A one-time pad is completely unbreakable because there is no pattern to the key that can be used to decrypt the message. Each character in the key is generated randomly and independently of the other characters. Therefore, the key is completely unpredictable. Even if an attacker knows the key length and has access to the ciphertext, they cannot use any techniques to decrypt it.

This is because there is no pattern to the ciphertext that can be used to determine the key.The only way to decrypt a one-time pad is to have the key. If an attacker tries to brute-force the encryption by trying all possible keys, they will generate every possible message that is the same length as the original message. This means that the ciphertext is completely meaningless without the key. It is therefore important to keep the key secret and ensure that it is only used once. ,Message: yellow stone Key: wolf To encrypt the given message using the vigenere cipher, we follow the steps below:Step 1: Write the message and key in a tabular form as shown below. To keep the process organized, we use the letters of the key to label the columns.

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Answer:

What we see in the sky

Where are they in the general context of the overview of the Universe?

With the naked eye, the main astronomical objects we can see are the Sun, the Moon, the stars, and some of the planets

All of the stars we see are in the Milky Way galaxy, most of them relatively close to the Sun.

The stars we see in the sky come in a range of brightnesses, partly because stars come in different intrinsic brightnesses, and partly because some are closer than others.

When we look at an astronomical object ``by eye'', we can't tell just by looking how far away it is (because not all objects have the same intrinsic brightness). All we can see is what direction it is in.

As a result, when looking ``by eye'', the positions of stars on the sky are described by their direction only; you can imagine that the sky is a big sphere with astronomical objects located at different positions on it. This is called the celestial sphere

The positions of the stars can be described with a sort of astronomical longitude and latitude, called right ascension and declination.

Constellations are patterns of stars seen in the sky. However, although the stars in any constellation are all in the same general direction in the sky, the different stars in a constellation may be at very different distances from Earth, hence constellations may not be real associations of stars in space, just stars in the same general direction as seen from Earth.

Only the nearest galaxies are visible to the naked eye, as relatively faint smudges of light, although two of the very nearest galaxies, the Magellanic Clouds, are visible are moderately large clouds from the Southern hemisphere.

Motions in the sky

Hope this helps! :)

The time it takes one to move from one place to another daily, can be used to quantify motion. Speed is used to quantify how fast an object moves.

What is motion?

This is the displacement with time of the position or orientation of a body. The displacement can be along a straight line or a curve.

Hence from the definition of motion, we can see that motion is dependent on time. We quantify motion by measuring the distance and dividing it by the time taken to move.

Speed measures how fast an object is moving through a distance, and it is calculated using this formula:

S= Δd/ Δt,

where S stands for speed,

d stands for distance, and

t stands for time.

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Answer:

Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.

Answer:

D. 100 J

Explanation:

Given

Mass (m) = 2 kg

Height (h) = 5 m

Acceleration due to gravity (g) = 10 m/s²

Now

Work done(W)

= m * g * h

= 2 * 10 * 5

= 100 Joule

Hope it will help :)❤

The work done in uplifting a brick having a mass of 2kg along with a height of 5m above ground level would be:

D). 100 J

Given that,

Mass of the brick \(= 2Kg\)

Height of the brick \(= 5m\)

As we know,

Work Done (W) \(= mgh\)

where

m = Mass

g = Acceleration due to gravity

h = height

A.T.Q.

By substituting the given values, we get;

\(Work Done (W)\) \(= 2\) × \(10\) × \(5\)            (taking \(g = 10 m/s^2\))

\(= 100 J\)

Thus, the work done is 100 J and hence, option D is the correct answer.

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Position vector r(t) at time is r(t) = −(3/2)t^2i + 5t^2j + 9t^2k + 5t + 1i + 8k

Given that a particle is traveling in a straight line and is located at point (10, −1, −9) and has speed 5 at time t=0.

The particle moves toward the point (7, 9, 9) with constant acceleration ⟨−3, 10, 18⟩. We need to find the position vector r(t) at time t.

To find the position vector r(t), we need to integrate the given equation for acceleration a(t).  The equation for acceleration is given by;`a(t) = ⟨−3, 10, 18⟩ = −3i + 10j + 18k

Now integrating this, we get the velocity equation,`v(t) = ∫ a(t) dt = ∫ (−3i + 10j + 18k) dt = −3ti + 10tj + 18tk + C`where C is the constant of integration.

Given that the particle has speed 5 at t = 0, we have;v(0) = 5

So substituting the value of t = 0 and v(0) in the velocity equation, we get,`v(0) = −3(0)i + 10(0)j + 18(0)k + C = C = 5

Thus the equation for the velocity v(t) is given by;`v(t) = −3ti + 10tj + 18tk + 5

Now, integrating the velocity v(t), we get the position vector r(t);

r(t) = ∫ v(t) dt

    = ∫ [−3ti + 10tj + 18tk + 5] dt

    = −(3/2)t^2i + 5t^2j + 9t^2k + 5t + C

where C is the constant of integration.

Using the initial condition, that the particle is at point (10, −1, −9) at t = 0;

r(0) = 10i − j − 9k + C = (10, −1, −9)`Solving for C, we get,`C = 1i + 8k

So the position vector r(t) is given by;`r(t) = −(3/2)t^2i + 5t^2j + 9t^2k + 5t + 1i + 8k

Hence the required position vector is r(t) = −(3/2)t^2i + 5t^2j + 9t^2k + 5t + 1i + 8k.

Answer: `r(t) = −(3/2)t^2i + 5t^2j + 9t^2k + 5t + 1i + 8k`

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Answer:

g=1.77π2xm/s2

Explanation:

T

=

2

π

√

l

g

∴

√

l

g

=

T

2

π

∴

l

g

=

T

2

4

π

2

∴

g

l

=

4

π

2

T

2

∴

g

=

4

π

2

l

T

2

g

=

4

π

2

×

1.00

1.50

2

=

1.77

π

2

x

m/s

2

Certainly! Here's some more detail about diodes and their operation as an electric check valve:

A diode is a two-terminal electronic component that consists of a p-n junction. The p-n junction is formed by bringing together a p-type semiconductor material (with an excess of positively charged holes) and an n-type semiconductor material (with an excess of negatively charged electrons). This junction creates a depletion region with no free charge carriers.

When a diode is forward-biased, meaning the positive voltage is applied to the anode (p-side) and the negative voltage is applied to the cathode (n-side), the depletion region is reduced, and the diode allows current to flow easily. This is the "on" state of the diode, where it conducts current in the forward direction.

However, when the diode is reverse-biased, with the positive voltage applied to the cathode and the negative voltage applied to the anode, the depletion region widens, creating a high resistance barrier for current flow. In this state, the diode acts as an open circuit, preventing current from flowing in the reverse direction. This is the "off" state of the diode, where it blocks the current flow.

The property of diodes allowing current to flow in only one direction makes them function as an electric check valve or a one-way switch for electrical current. This property is widely used in electronic circuits for rectification, voltage regulation, signal demodulation, and other applications.

It's important to note that while the ideal diode blocks current completely in the reverse direction, real-world diodes have a small leakage current in the reverse direction, which is typically very low but not zero.

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Given,

The velocity of the spaceship in as observed by an observer at the earth, v=0.75c

The time interval as observed by the observer on the earth, t₁=2.5 s

The time elapsed in the ship's frame of reference is given by,

On substituting the known values,

Thus the time elapsed for an observer in the spaceship is 3.79 s

Answer:

Angle of reflection = 30°

Explanation:

One of the laws of reflection is that the angle of incidence is equal to the angle of reflection.

The angle at which the light strikes the mirror is called the angle of incidence while the angle at which the light gets reflected back is called angle of reflection.

In this case, the angle of incidence is 30 degrees. So, we can say that the angle of reflection is also equal to 30 degrees.

Answer:

30 degrees

Explanation:

got it right on the assingment

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The shortest chain sling, ACB, that can be used to lift the loaded bin without exceeding a tension of 5 kN

To determine the shortest chain sling configuration, we need to consider the forces acting on the loaded bin during lifting. The maximum tension in the chain sling should not exceed 5 kN.

Let's assume that A, B, and C are the lifting points on the loaded bin, and ACB represents the chain sling configuration.

To calculate the tension in the chain sling, we need to consider the angles at each point and the weight of the loaded bin.

Let W be the weight of the loaded bin (in kN) and θ1, θ2, and θ3 be the angles at points A, B, and C, respectively.

The tension in the chain sling, T, can be calculated using the following formula:

T = W / [(cos θ1)(cos θ2)(cos θ3)]

To find the shortest chain sling configuration, we need to determine the values of θ1, θ2, and θ3 that minimize the tension T while not exceeding 5 kN.

By applying appropriate rigging techniques and considering the geometry of the loaded bin and the available lifting points, the specific chain sling configuration, ACB, can be determined. This may involve using various combinations of chain lengths and angles to achieve the desired result.

The shortest chain sling configuration, ACB, that can be used to lift the loaded bin without exceeding a tension of 5 kN is determined based on the weight of the bin, angles at the lifting points, and the calculated tension in the chain sling. This configuration can be obtained by employing appropriate rigging techniques and considering the specific requirements of the lifting operation.

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The angular and linear speed are 5π rads/ seconds and 10π meter/ seconds.

In order to calculate the angular speed of the boy, we will use the equation below.

w =2πn/ T

Where

radius is 2 meter

number of oscillation is 10.

time is 4 s

So, we have

w = 2π * 10/4

w = 5π rads/ seconds.

To calculate the linear speed.

v = r *w

v = 2 * 5π

v = 10π meter/ seconds

Therefore, the angular and linear speed are 5π rads/ seconds and 10π meter/ seconds.

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The magnitude and direction of the average collision force exerted on the object depend on the type of object and the type of force it experiences.

For example, if the object experiences a constant force, the magnitude of the force will be equal to the force applied and the direction will be the same as the direction of the applied force.

On the other hand, if the object is subjected to a variable force, the magnitude of the force will vary depending on the magnitude and direction of the applied force, and the direction will be the same as the direction of the applied force. In either case, the magnitude and direction of the average collision force can be determined using the equation F = ma, where F is the force, m is the mass of the object, and a is the acceleration of the object.

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The experimental evidence led to the development of have gathered new evidence. One of the atomic models this atomic model from the one before it is the colors of light emitted from heated atoms had very specific energies.

As scientific knowledge about the structure of the atom has changed, so have models of the atom.

The Rutherford planetary model, which depicts electrons travelling around the nucleus like planets move around the sun in the solar system, is the direct precursor of the model illustrated in the figure attached.

This model was created as a result of the study of light hues released by heated atoms with highly particular energies.

The Bohr model of the atom is so named because Niels Bohr had a major role in developing it. The passage of electrons between energy levels caused the light hues released by heated atoms. Electrons are grouped in shells or energy levels.

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The buoyant force acts upon the center of volume of an object immersed in a fluid. This is the point at which the volume of the object is balanced in all directions by the surrounding fluid.

However, it is important to note that the center of volume may not necessarily coincide with the object's center of mass, center of gravity, or center of gyration. These points are determined by other factors such as the distribution of mass or the shape of the object.

1. An object submerged in a fluid experiences a buoyant force.
2. This buoyant force is equal to the weight of the fluid displaced by the object.
3. The buoyant force acts upward, opposing the object's weight.
4. The point at which this force is applied is the center of volume, which is the geometric center of the displaced fluid.

So, the buoyant force acts upon the center of volume.

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Answer:

-to defend territory

-to support allies

-to protect economic interests

Explanation:

100% on edge

A nation most likely uses military force-

To defend the nation and its population from immediate danger, military superiority contributes to the maintenance of peace and stability in areas crucial to national interests and finances international security commitments.

The current method used by countries to obtain emergency recruits during times of conflict is drafting. This act, known as conscription in medieval and ancient periods, frequently involved taking young boys against their will from their homes.

Most of the time, leadership is crucial. The Army upholds national laws, accomplishes national goals, and prevents any nation's aggressive actions in order to maintain peace.

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