Can you produce a net impulse on an automobile if you sit inside and push on the dash board?

The mechanism that is responsible for the formation of snowflakes is the nucleation of ice crystals.

This is defined as a piece of snow which falls from the sky as a result of an extremely cold climate condition and is common in the arctic regions of the world.

Snow flakes are formed when ice crystals stick together to form the flakes which usually has a dust or pollen being formed around the area being talked about.

This is also regarded as a type of precipitation such as rain etc and is therefore the most appropriate choice.

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If  you throw a ball against the ceiling—so the ball moves upward and then rebounds to move downward, at the instant the ball hits the ceiling, the acceleration is d. Negative.

When the ball hits the ceiling, it experiences a sudden change in its motion. Before hitting the ceiling, the ball is moving upward with a positive velocity and experiencing a positive acceleration due to the force of gravity pulling it down. However, upon hitting the ceiling, the direction of motion changes, and the ball starts moving downward. As a result, its velocity becomes negative, and the acceleration also becomes negative to oppose the motion and slow down the ball's upward velocity. Therefore, the acceleration at the instant the ball hits the ceiling is negative.

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Answer:

Friction reduces efficiency because when two surfaces slide past each other, friction resists their motion, and in real machines, some input work is always used to overcome friction.

Please give the brainliest.

Answer:

C

Explanation:

Prevents further damage to the network cable.

This issue can be resolved by applying the momentum conservation principle. The total amount of momentum prior to and following the impact are equal. This can be expressed as:

(M1 + M2)vf = m1v1 + m2v2

m1 equals 200 kilograms (mass of wrestler 1)

v1 = 2.3 m/s (velocity of wrestler 1) (velocity of wrestler 1)

v2 = 2.9 m/s (velocity of wrestler 2) (velocity of wrestler 2)

m2 = the wrestler's mass two (unknown)

vf is the wrestlers' combined final speed before the collision (which we know is zero)

It's the same response we previously received. The problem is that the negative sign shows that Wrestler 2's velocity is moving in the opposite direction from Wrestler 1's velocity. Wrestler 2 is therefore traveling against the current. To gather the wrestlers in bulk

If r 2 is 2, we can omit the minus sign and use the absolute value instead:

As a result, wrestler 2 weighs roughly 158.62 kg.

In order to change the momentum of an object, you must exert a certain amount of force over a specific period of time. It is  because of this. For instance, when you strike a ball with a cricket bat, you exert power temporarily (in this case, very briefly) in order to change (or transfer) the momentum of the ball. |m2| = 158.62 kg

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Answer:

I think it is Boron

Explanation:

I looked it up but I hope this helps happy holidays!

If a resistor, an inductor and a capacitor are connected in series, the phase angle between the voltages of the inductor and capacitor in a RLC series circuit is 180 degrees.

A resistor , capacitor and inductor are key components of a RLC circuit. Resistor doesn't store energy but capacitor and inductor stores energy and that is the reason resistor is called a passive element and inductor and capacitors are called active element.

Inductor leads the current by a phase angle of 90 degrees and the voltage across the capacitor lags the current by 90 degrees, so the phase difference between the voltages of the inductor and the capacitor is 180 degrees in an RLC circuit.

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When a substance freezes, its atoms become locked in place so they do not move from one position to another. Therefore, any substance that is frozen is a solid. Hence, option (D) is correct.

One of the four basic states of matter is solid (the others being liquid, gas, and plasma). The least solid molecules are those that are tightly packed together and make up solids.

A solid is distinguished by its structural rigidity and resistance to external forces. A solid substance, unlike a liquid, does not flow to conform to the shape of its container or, like a gas, expand to cover the entire space. A solid's atoms are connected to one another either in a regular geometric lattice (such as that found in metals and common ice), or in an asymmetrical manner (an amorphous solid such as common window glass).

Therefore, any substance that is frozen is a solid.

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The MIPS instruction "bcp" is designed to copy a block of words from one address to another. It requires the starting address of the source block to be stored in register $t1 and the destination address to be stored in register $t2. The number of words to be copied should be stored in register $t3, and this value should be greater than 0. During the execution of this instruction, the values in registers $t1, $t2, $t3, and $t4 can be destroyed as they may be used as temporaries.

In summary, the "bcp" instruction in MIPS allows for the efficient copying of a block of words between memory locations using the specified registers, with the understanding that the values in those registers may be modified during execution.

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Answer:

the work done can be positive or negative  

Explanation:

Answer:

1.439 × 10¹¹ m is the answer.

Explanation:

1 light-second = 2.998 × 10⁸m

480 light-seconds = 480 × 2.998 × 10⁸

= 1439.04 × 10⁸

= 1.439 × 10¹¹

∴ 1.439 × 10¹¹ m is the answer.

The distance converted into the meter will be 1.439×10¹¹ m.In one light second, there are 2.998 ×10⁸ m.

Distance is a numerical representation of the distance between two objects or locations.

The distance can refer to a physical length or an estimate based on other factors in physics or common use. |AB| is a symbol for the distance between two points A and B.

The given data in the problem is;

The  distance between the sun and moon is,d= 480 light second

\(\rm d_m\) is the distance in meter

As we know,

\(\rm 1\ light\ second = 2.998 \times 10^8m \\\\ 480\ light\ seconds = 480 \times 2.998 \times 10^8\ m \\\\ d_m= 1439.04 \times 10^8 \\\\ d_m = 1.439 \times 10^{11}\)

Hence the distance converted into the meter will be 1.439×10¹¹ m.

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Infrared and visible light are also not blocked by the ozone layer and can pass through it. Ultraviolet

The ozone layer in the stratosphere absorbs and blocks most of the ultraviolet radiation from the sun. This is important as ultraviolet radiation can cause skin damage and increase the risk of skin cancer. Gamma rays and radio waves are not affected by the ozone layer as they have too high or low frequencies respectively.

Ozone in the stratosphere blocks ultraviolet (UV) radiation from the sun. This is important because UV radiation can be harmful to living organisms, causing skin damage, eye damage, and even cancer. The ozone layer effectively absorbs and prevents most of the UV radiation from reaching the Earth's surface, protecting life on our planet.

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Answer:

1.) Chemical Change - a change in matter that results in a change in its identity and properties

2.) Combustibility - the ability of a substance to burn

3.) Reactivity - The ability of a substance to combine Chemically with another

4.) Chemical Property - the ability of matter to change into a different substance

Explanation:

Proof: -Image Below & the definitions for each word-

Chemical Change- Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. ... An example of a chemical change is the reaction between sodium and water to produce sodium hydroxide and hydrogen.

Combustibility- Combustibility is a measure of how easily a substance bursts into flame, through fire or combustion. This is an important property to consider when a substance is used for construction or is being stored. It is also important in processes that produce combustible substances as a by-product.

Reactivity- In chemistry, reactivity is the impetus for which a chemical substance undergoes a chemical reaction, either by itself or with other materials, with an overall release of energy.

Chemical Property- A chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity. ... They can also be useful to identify an unknown substance or to separate or purify it from other substances.

Have a nice day!

Chemical change - A change in a substance that brings a change in its identity and properties

Combustibility - The ability of a substance to bursts into the combustion

Reactivity - The ability of a matter to chemically combine with others.

Chemical Property - The ability of a substance to change into a completely different substance.

Chemical changes take place when a substance combines with another substance to create a new substance, called chemical synthesis. An example of a chemical change is the formation of sodium hydroxide and hydrogen by the reaction between sodium and water.

Combustibility determines how easily a substance can burst into flame, through combustion. The combustibility is a property to consider when a substance is used for storage or for construction. It is also an important property in processes where the formation of combustible substances is a side product.

In chemistry, reactivity is the property of a chemical substance that undergoes a chemical reaction with itself or with other chemicals,  and the overall release of energy.

Chemical properties are the characteristics of a particular substance that can be noticed during a chemical reaction. Some major chemical properties include heat of combustion, flammability, rate of radioactive decay, toxicity, pH value, and chemical stability.

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Answer:

9.8 meters per second squared

Explanation:

Answer:

9.8 meters per second squared

Explanation:

edge

Answer:

The length of the incline is 3.504 meters.

Explanation:

Let suppose that Julietta's ball decelerates uniformly, then we determine the length of the incline is determined by the following equation of motion:

\(\Delta s = v_{o}\cdot t +\frac{1}{2}\cdot a \cdot t^{2}\) (Eq. 1)

Where:

\(\Delta s\) - Length of the incline, measured in meters.

\(v_{o}\) - Initial speed of the ball, measured in meters per second.

\(a\) - Aceleration of the ball, measured in meters per square second.

\(t\) - Time, measured in second.

If we know that \(v_{o} = 2.95\,\frac{m}{s}\), \(t = 1.54\,s\) and \(a = -0.876\,\frac{m}{s^{2}}\), then the length of the incline is:

\(\Delta s = \left(2.95\,\frac{m}{s} \right)\cdot (1.54\,s)+\frac{1}{2}\cdot \left(-0.876\,\frac{m}{s^{2}} \right) \cdot (1.54\,s)^{2}\)

\(\Delta s = 3.504\,m\)

The length of the incline is 3.504 meters.

The galaxy comprises of various stars. We are unlikely to find earth-like planets around halo stars in the galaxy because Halo stars need few heavy elements to create rocky planets.

A galaxy is a massive cluster of stars held together by t he effect of gravity.

Halo stars formed in an environment where there were few heavy elements to create rocky planets.

Thus, we are unlikely to find earth-like planets around halo stars in the galaxy because Halo stars need few heavy elements to create rocky planets.

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In the case of uniform accelerated motion, the graph of velocity versus time is a straight line. Therefore, option C is correct.

When a body experiences an acceleration constantly for a period of time, the velocity of the body changes. If we draw a graph the velocity on the vertical axis and time on the horizontal axis. A straight line is drawn which indicates that the velocity is increasing or decreasing uniformly.

This velocity increases or decreases uniformly depending upon the equal intervals of time. The slope line indicates the acceleration of the object and it also indicates the change in velocity per unit of time.

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The direction of the reaction force on the collar will be Non constrained motion direction .

ω = v / r

Since the cylinder is wrapped about the string, it rolls without slipping with respect to the string. The constraint  relationship to assure this kind of motion can be obtained by considering the relative velocity of the point on the  cylinder that is in contact with the string with respect to the string­­ it  should be zero.

The velocity of the center of the cylinder,

v = dy (t) / dt,  r and the  rotation rate of the cylinder, ω

We have to first find the velocity of the contact point relative to the center of the cylinder. Since this ignores the  translational motion of the entire cylinder with respect to the ground, we then need to add back in the cylinder's center­ of ­mass velocity to find the velocity of the contact point with respect to the ground.

So, v (contact) = ωr - v  where,

ω is the angular velocity

v is the linear velocity

r is the radius

ω = v / r

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If the earth rotated on an axis that was not tilted with respect to earth's orbit Under this condition time periods of daylight and darkness be equal everywhere on earth all year.

The Earth orbits the Sun in a counterclockwise pattern above the northern hemisphere at an average distance of 149.60 million km.

The Earth revolves around its axis once every 24 hours and orbits the sun once every 365 days. The Earth's rotation on its axis, not its orbit around the sun, causes day and night.

The term 'one day' refers to the time it takes the Earth to rotate once on its axis, which includes both day and night.

Hence the earth rotated on an axis that was not tilted with respect to the earth's orbit Under this condition time periods of daylight and darkness be equal everywhere on earth all year.

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Given parameters:

Initial speed of train  = 0m/s

Final speed  = 25m/s

time = 20s

Unknown:

Total distance covered  = ?

Solution:

Speed is a scalar quantity that has magnitude and no direction.

Mathematically;

     Speed  = \(\frac{distance}{time}\)

  distance  = speed x time

 Input the parameters and solve for distance;

    Distance  = 25 x 20 = 500m

The distance covered is 500m

This is a problem in special relativity that involves the concept of time dilation and length contraction.

We can use the Lorentz transformation equations to find the time difference between the two events in the moving system k'.

Let t1 and t2 be the times at which the two events occur in system k, and let x1 and x2 be their positions along the x-axis of k.

We are given that the events occur at the same time in k, so t1 = t2. We are also given that the distance between the events in k is 7 km, so x2 - x1 = 7 km.

Let's assume that k' is moving to the right with a speed v relative to k. Then, the position and time coordinates of the events in k' can be found using the following Lorentz transformation equations:

\(x' = \gamma(x - vt)\)

\(t' =\gamma(t - vx/c^2)\)

where \(\gamma= 1/√(1 - v^2/c^2)\) is the Lorentz factor.

To find the time difference between the events in k', we need to find the difference between their time coordinates in k'. Using the Lorentz transformation equations, we can express the positions and times of the events in k' as:

\(x1' = \gamma(x1 - vt)\)

\(x2' = \gamma(x2 - vt)\)

\(t1' = \gamma(t1 - vx1/c^2)\)

\(t2' = \gamma(t2 - vx2/c^2)\)

Since t1 = t2, we can simplify the expressions for t1' and t2' as:

\(t1' = \gamma(t1 - vx1/c^2) = \gamma(t2 - vx1/c^2)\)

t2' = γ(t2 - vx2/c^2) = γ(t1 - vx2/c^2)

Subtracting these two equations, we get:

\(t2' - t1' = \gamma(v/c^2)(x2 - x1)\)

Substituting the values given in the problem, we get:

\(t2' - t1' = \gamma(v/c^2)(7 km)\)

We also know that the distance between the events in k' is 17 km. Using the Lorentz transformation equation for length contraction, we can express this distance as:

\(x2' - x1' = \gamma(x2 - x1) = γ(7 km)\)

Substituting the value of γ from this equation into the expression for t2' - t1', we get:

\(t2' - t1' = (17 km/c) (v/c)\)

Simplifying this expression, we get:

\(t2' - t1' = (17/c) (v/c) s\)

So, the time difference between the two events in system k' is proportional to the speed v of k' relative to k, and is given by the formula above in seconds.

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No; the graph fails the vertical line test.

option C.

The vertical line test is a graphical method used to determine if a given curve or graph represents a function.

It involves drawing a vertical line anywhere on the graph and observing whether the line intersects the curve at more than one point.

If a vertical line intersects the curve at only one point for all possible values of x, then the graph represents a function.

On the other hand, if a vertical line intersects the curve at more than one point for any value of x, then the graph does not represent a function.

So when we draw a single straight vertical line through the circular curve, it intersects at two points, so it does not show a function.

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The temperature of the universe as a whole today is approximately 2.73 Kelvin (K).

This temperature is known as the cosmic microwave background radiation (CMBR), which is the afterglow of the Big Bang and is found throughout the entire universe.

The CMBR is a faint background radiation that is uniform in all directions, with a spectrum corresponding to a black body at a temperature of 2.73 K.

The temperature has cooled as the universe expanded, with the radiation now in the microwave region of the electromagnetic spectrum.

The discovery of the CMBR was a significant piece of evidence for the Big Bang theory, as it provided direct evidence of the early universe when it was hot and dense, and it continues to be a subject of study in astrophysics and cosmology.

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a) Required chip rateThe processing gain is given by\[G_p = 10{\log _{10}}\left( {{\rm{\Gamma }}{N_{ch}}/{B_c}} \right)\]where Γ is the number of chips per symbol, Nch is the number of hopping channels, and Bc is the chip rate.To determine the chip rate, we must first determine the symbol rate. In this case, the symbol rate is the same as the sampling rate of the PCM modulator, which is 256 × 3.4 kHz = 870.4 kHz.

Since there are Γ chips per symbol, and the processing gain must be at least 23 dB,\[\begin{gathered}

 23{\rm{ dB}} = 10{\log _{10}}\left( {\Gamma {N_{ch}}/{B_c}} \right) \Rightarrow \hfill \\

 10^{23/10} = \Gamma {N_{ch}}/{B_c} \Rightarrow \hfill \\

 {B_c} = \Gamma {N_{ch}}/{{10}^{23/10}} \hfill \\

\end{gathered} \]Let us suppose that we use a pseudo-random sequence of length m = 4. In this case, the number of chips per symbol is given by\[{\Gamma _{DS-SS}} = {2^m} - 1 = 15\]Thus, substituting into the previous equation, we get\[B_c = \left( {15\, \times \,{N_{ch}}} \right)/{6.309}\]Solving for Bc and substituting the processing gain requirement of 23 dB, we get\[B_c \ge 3.194\,{\rm{MHz}}\]Thus, the required chip rate is at least 3.194 MHz.

b) Number of hopping channels if the speech was transmitted by a frequency-hopping spread spectrum (FH-SS) systemThe number of hopping channels can be determined using the relationship\[N_{ch} \le B_c/W\]where W is the frequency range covered by the frequency-hopping sequence. In a FH-SS system, this frequency range must be larger than the baseband bandwidth of the signal, which in this case is 3.4 kHz. If we choose a frequency range of W = 4 kHz, then we get\[N_{ch} \le B_c/W = 3.194/4 = 798.5\]Since Nch must be an integer, we can choose Nch = 798. Therefore, the number of hopping channels is 798.

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Answer:

In today's world pollution is very high so alternative energy such as solar energy help us to make pollution free world. So it is necessary to use alternative energy.

Answer:

Fc = M v^2 / R       centripetal acceleration

Fc2 / Fc1 = R1 / R2     since M and v are the same for both

If R2 = 3 R1 then the centripetal acceleration for particle 2 will be 1/3 of that of innermost (R1) particle

Answer:

The Answer is FRICTION!

The create is moving at a constant velocity, so there is no acceleration and the crate is in equilibrium. This means the net force acting on the crate is 0. By Newton's second law, we have

n - w = 0

s - f = 0

where n denotes the magnitude of the normal force acting on the crate, w denotes its weight, s is the magnitude of the force applied by the person (s for sliding), and f is the magnitude of the kinetic friction force.

The friction force is proportional ot the normal force by a factor of µ, the coefficient of kinetic friction. So we have

n = w = (100 kg) (9.80 m/s²) = 980 N

s = f = µ n  →  325 N = µ (980 N)   →   µ = (325 N) / (980 N)

So the coeficient of kinetic friction is approximately µ ≈ 0.332.

Employing a single cost comparison model provides a practical approach to evaluating the cost effectiveness of local sourcing in the context of distance and vulnerability in supply chains and procurement systems.

A practical step to determine the cost effectiveness of local sourcing in the given scenario would be to utilize a single cost comparison model.

This model would involve comparing the costs associated with local sourcing against those of distant sourcing, taking into account factors such as transportation costs, lead times, inventory holding costs, quality control measures, and any other relevant expenses.

The cost comparison model would involve gathering data on the various cost components associated with both local and distant sourcing options.

This would include collecting information on the prices of raw materials, transportation costs, import/export duties, storage costs, and any other relevant expenses.

The model would then calculate the total cost for each sourcing option and compare them to determine which one is more cost-effective.

By utilizing a single cost comparison model, organizations can systematically assess the financial implications of local sourcing.

This step allows for an objective evaluation of the costs involved and enables decision-makers to make informed choices based on a comprehensive understanding of the economic factors at play.

Additionally, it helps identify potential cost savings and highlights any potential risks or challenges associated with local sourcing.

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