Review your answer to part c. In addition, reread the portion of your physics text that discusses Newton's third law. Then consider a book on a level table: e. Which force completes the Newton's third law (or action-reaction) force pair with the normal force exerted on the book by the table?

Answer:

0.25 m

Explanation:

Given that,

The speed of sound, v = 330 m/s

The frequency of the note of the instrument, f = 1320 Hz

We need to find the wavelength of the sound wave.

We know that,

Wavelength, \(\lambda=\dfrac{v}{f}\)

Put all the values,

\(\lambda=\dfrac{330}{1320}\\\\\lambda=0.25\ m\)

So, the wavelength of the sound wave is equal to 0.25 m.

Answer: .25m edge 2020

Explanation:

Answer:

13.8m/s

Explanation:

Speed = Distance/Time

Since the object moved 138m over 10s we just substitute it in.

Speed = 138/10s

Speed = 13.8m/s on Average

Answer:

i think try theanswer

Explanation:

proper

Answer:

A

Explanation:

For an object to move with constant speed the forward force is opposed by the effects of forces. There is no resultant force acting or constant speed is a result of no resultant force.

Newton's second law states that an object with no net forces acting on it which is initially at rest will remain at rest. If it is moving, it will continue to move in a straight line with constant velocity. Newton's Second Law states: F = ma. F is the net force acting on an object.

Also if velocity or speed is constant the acceleration will be 0 the F=m×0

F=0.

Answer:

4m/s^2

Explanation:

a=v‒u/t (here v is final velocity &u is initial velocity)

a=20m/s‒0m/s/5s

a=20m/s/5s

a=4m/s^2

hope it helps you

The altitude of the satellite is 883.89 km

Generally, The Rayleigh criterion for resolution states that the minimum angle, θ, between two point sources that can be resolved is given by:

θ = 1.22 * λ / D

where

λ is the wavelength of light and

D is the diameter of the lens.

The minimum distance, d, between two point sources that can be resolved is given by:

d = θ * L

where

L is the distance from the lens to the image.

Given the green lights have a wavelength of 508 nm, we can convert it to meters:

λ = 508 * 10^-9 m

Given the diameter of the lens is 49.8 cm, we can convert it to meters:

D = 49.8 cm * (1 m / 100 cm)

= 0.498 m

Using the Rayleigh criterion, we can find the minimum resolvable angle:

θ = 1.22 * λ / D

= 1.22 * 508 * 10^-9 / 0.498

= 1.24449799*10^{-6} radians

We know the lights on the satellite are spaced 1.1 m apart, so:

d = 1.1 m

Solving for the distance from the lens to the image, L:

L = d / θ

= 1.1 m / 1.24449799*10^{-6} radians

=883890.53 m

Finally, converting the distance to kilometers:

L = 883890.53 m * (1 km / 1000 m)

= 883.89 km

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It will need a force acceleration

The magnifying glass represents one of the simplest, most direct applications of a converging lens. As light enters the lens, it becomes focused to a specific focal point in front of the center of the lens. Once you bring the magnifying glass to the optimal distance, so the focal point reaches the object, the object will appear at maximum magnification. Move the glass farther from the object and it will become distorted; move the glass closer to the object and it will decrease in magnification.

Divergent lenses are used on flashlights to magnify the light produced by the bulb. The light falls on the concave side of the lens, and the rays diverge on the other side, thereby increasing the apparent radius of the light source and providing a wider beam.

Answer:

Force = 4.25 Newton

Explanation:

Given the following data;

Mass = 10 kg

Momentum = 15 Kgm/s

Time, t = 20 seconds

Final velocity, V = 10 m/s

To find the average force required;

First of all, we would determine the initial velocity of the object.

Momentum = mass * velocity

15 = 10 * velocity

Velocity = 15/10

Velocity = 1.5 m/s

Next, we would determine the acceleration of the object by using the first equation of motion;

V = U + at

10 = 1.5 + a*20

10 - 1.5 = 20a

8.5 = 20a

Acceleration, a = 8.5/20

Acceleration, a = 0.425 m/s²

Lastly, we would find the average force by using the formula;

Force = mass * acceleration

Force = 10 * 0.425

Force = 4.25 Newton

The cerebellum is an important part of the brain that performs several vital functions. These include:

1. Smooth and coordinate skilled muscle activity: The cerebellum processes information from the motor cortex and sensory systems to fine-tune and coordinate muscle movements. This results in precise and fluid actions, such as writing or playing a musical instrument.

2. Detect problems in carrying out voluntary muscle activity and correct them: The cerebellum continually monitors and compares intended movements with actual movements. If there's a discrepancy, it sends corrective signals to the motor cortex, ensuring accurate and efficient muscle control.

3. Regulation of balance and posture: The cerebellum receives input from the vestibular system and proprioceptors (sensors in muscles and joints), enabling it to maintain proper balance and posture. It adjusts muscle activity to compensate for changes in body position or movement.

In summary, the cerebellum plays a crucial role in coordinating skilled muscle activities, detecting and correcting errors in voluntary muscle movements, and regulating balance and posture. These functions ensure smooth, accurate, and well-coordinated actions in our daily lives.

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F = ma, or force equal to mass times acceleration, is Newton's second law of motion.

Second Law of Movement by Newton Since it shows how powers and movement are connected, F=ma is essential. You can use it to determine an object's velocity and position, as well as its acceleration with known forces. For inventors, scientists, and engineers, This is extremely helpful.

As per Newton's Second Law of Movement, when a power works on a mass, the mass speeds up (gains speed) (object). When you ride a bicycle, you can see this law of motion in action in a great way. Your bike makes up the mass. Your leg muscles press against the bicycle's pedals to produce the force.

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As per the given data of velocity of sound wave through different gas medium, sound wave travels through methane gas more fastly than through ammonia.

Sound waves are longitudinal mechanical waves passing through a medium. In sound waves,, the oscillation of particles is in the same direction of wave propagation. Such waves are called longitudinal waves.

Sound waves travels through air with a speed of 340 m/s. The speed of the wave through different medium depends on  the density of the medium as well as frequency.

The speed of sound wave through ammonia gas is 415 m/s. Speed through methane gas is 450 m/s. Thus, sound waves travels fastly through methane than through ammonia.

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When holding the string still, the tension in the right string is equal to the weight of the hanging mass, while the tension in the left string is zero. Once the string is released, the tension in both sides of the string remains the same.

1. When you hold the string still, preventing movement, there is no acceleration in the system. This means that the net force acting on each mass is zero.

2. The right string is connected to the hanging mass. Since the mass is in equilibrium, the tension in the right string is equal to the weight of the hanging mass (T_right = m * g, where m is the mass and g is the acceleration due to gravity).

3. The left string is connected to the mass on the left side. Since there is no acceleration in the system, the tension in the left string must be zero, as there is no net force acting on the left mass (T_left = 0).

4. When you let go of the string, the system is no longer in equilibrium. The weights of the masses cause a net force to act on each mass.

5. However, the tension in the string does not change instantaneously. The tension in the left and right strings remains the same from the moment you held the string still to the moment the masses start to move. This is because there is no change in the tension until the system experiences acceleration, which occurs after the release of the string.

6. Once the masses start to move, the tension in both sides of the string adjusts to accommodate the new equilibrium positions of the masses.

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Answer:

An example of this law can be riding a bicycle.  When you push on the pedals, your bicycle speeds up. You are creating the speed of the bicycle by emitting pressure to the pedals.

Explanation:

Force=Mass×Acceleration

Answer:

asd

Explanation:

Answer:

We can use the formula for the transformer voltage ratio, which states that the ratio of the number of turns in the primary coil to the number of turns in the secondary coil is equal to the ratio of the output voltage to the input voltage:

Np/Ns = Vp/Vs

where Np is the number of turns in the primary coil, Ns is the number of turns in the secondary coil, Vp is the input voltage, and Vs is the output voltage.

We know that Vp = 220 V and Vs = 140 V, and we are trying to find Ns. We also know that Np = 30, since that is the number of turns in the primary coil. Substituting these values into the formula, we get:

30/Ns = 220/140

Simplifying the right side of the equation, we get:

30/Ns = 11/7

Cross-multiplying, we get:

11Ns = 210

Dividing both sides by 11, we get:

Ns = 19

Therefore, the answer is b.) 19.

The best method to convert AC to DC depends on the specific requirements, but switching power supplies are generally preferred for high efficiency and power conversion, while linear regulators, BJT regulators, and Zener regulators have their own advantages and considerations.

The choice of the best method to convert AC (alternating current) to DC (direct current) depends on the specific requirements and constraints of the application. Each of the methods you mentioned has its own advantages and considerations:

1. BJT (Bipolar Junction Transistor) Regulator: A BJT regulator can be used to convert AC to DC by rectifying the input signal. It typically uses diodes to perform the rectification and a BJT to regulate the output voltage. BJT regulators can provide relatively high current output and are suitable for applications where efficiency is not the primary concern. However, they can generate significant heat due to their linear nature, and their efficiency is lower compared to other methods.

2. Zener Regulator: A Zener regulator also uses diodes, but in this case, a Zener diode is employed for voltage regulation. Zener diodes are specifically designed to operate in the reverse breakdown region, where they maintain a constant voltage across their terminals. Zener regulators are relatively simple and inexpensive, but they are less efficient compared to other methods and may not be suitable for high-power applications.

3. Linear Voltage Regulator: Linear voltage regulators use active components such as operational amplifiers and pass transistors to regulate the output voltage. They provide a stable output voltage and are widely used in various electronic devices. Linear regulators are relatively simple to design and offer good voltage regulation. However, they suffer from low efficiency, especially when there is a large voltage drop between the input and output. They are more suitable for low-power applications.

It's important to note that if you require high efficiency and/or high power conversion, switching power supplies (such as buck converters, boost converters, or flyback converters) are often preferred over the methods you mentioned. Switching power supplies use high-frequency switching to convert AC to DC more efficiently, but they are more complex to design and implement compared to the linear regulators and may introduce more noise into the system.

The best method for AC to DC conversion depends on factors such as the desired output power, efficiency requirements, cost constraints, and the specific application's needs. It's recommended to evaluate these factors to determine the most appropriate method for your particular situation.

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The girl is at a distance of 2 m from the fulcrum, the father must sit at a distance of 378 cm from the fulcrum. The correct answer is option a. 67 cm from the girl.

To balance the seesaw, the torques on both sides of the fulcrum must be equal:

m₁ * g * d₁ = m₂ * g * d₂

Substituting the given values:

30 kg * 9.8 m/s² * 2 m = 90 kg * 9.8 m/s² * d₂

Simplifying the equation:

588 Nm = 882 Nm * d₂

Dividing both sides by 882 Nm:

d₂ = 588 Nm / 882 Nm = 2/3

Therefore, the father must sit at a distance of 2/3 of the total length of the seesaw. The total length is the sum of the distances of the girl and the father from the fulcrum.

Total length = d₁ + d₂ = 2 m + (2/3) m = 8/3 m = 2.67 m

So, the father must sit at a distance of 2/3 * 2.67 m = 1.78 m = 178 cm from the girl.

Since the girl is at a distance of 2 m from the fulcrum, the father must sit at a distance of 2 m + 1.78 m = 3.78 m = 378 cm from the fulcrum.

Therefore, the correct answer is option a. 67 cm from the girl.

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There is a positive acceleration where −x direction decreasing in speed.

The term acceleration refers to the change of velocity with time of the body. Now we know that both velocity and acceleration  are both vector quantities. We have to put the direction into consideration when looking at the acceleration of a body.

The case in which the car has a positive acceleration is the option where a car has a negative velocity and a positive acceleration is −x direction decreasing in speed.

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Missing parts;

In which of the following cases does a car have a negative velocity and a positive acceleration? A car that is traveling in the Check all that apply. Check all that apply.

a.+x direction decreasing in speed.

b.+x direction increasing in speed.

c.−x direction decreasing in speed.

d.−x direction increasing in speed.

e.−x direction at a constant 20 m/s.

The mass of the car, according to the inquiry, is 897.6 kg.

Mass is the measure of the amount of matter in an object. It is measured in kilograms (kg) in the International System of Units (SI), or in pounds (lb) or ounces (oz) in the imperial and US customary systems. Mass can also be measured using density, which is the ratio of mass to volume.

The kinetic and potential energies of the car can be added to get its total mechanical energy, which is 920,500 J. We know the height of the slope (1.2 m), the speed of the car (18 m/s), and that it is flying over the hill.

K = 0.5 x m x (18 m/s)²

U = m x 9.8 m/s² x 1.2 m

0.5 x m x (18 m/s)² = 920,500 J

m x 9.8 m/s² x 1.2 m = 920,500 J

Solving these two equations, we get m = 897.6 kg.

Therefore, the mass of the car is 897.6 kg.

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The initial vertical velocity of the cannon-ball is 5.6 m/s.

The initial vertical velocity of the cannon-ball is calculated by applying the formula for a projectile to reach the maximum height.

Vf² = Vi² - 2gH

where;

At maximum height, the final vertical velocity = 0

0 = Vi² - 2gH

Vi² = 2gH

Vi = √ ( 2gH )

Vi = √ ( 2 x 9.8 x 1.6 )

Vi = 5.6 m/s

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Answer:

from spectral lines astronomers Can determine

Answer:

1.01×10^20 molecules of ozone.

Explanation:

Data obtained from the question include:

Volume (V) = 2 L

Temperature (T) = 275 K

Pressure (P) = 1.89×10¯³ atm

Gas constant (R) = 0.0821 atm.L/Kmol

Number of mole (n) of ozone =.?

Using the ideal gas equation, we can obtain the number of mole of ozone as follow:

PV = nRT

1.89×10¯³ x 2 = n x 0.0821 x 275

Divide both side by 0.0821 x 275

n = (1.89×10¯³ x 2) /(0.0821 x 275)

n = 1.67×10¯⁴ mole.

Therefore the number of mole of ozone in 2 L of air is 1.67×10¯⁴ mole.

Finally, we shall determine the number of molecules present in 1.67×10¯⁴ mole of ozone.

This can be obtained as follow:

From Avogadro's hypothesis, 1 mole of any substance contains 6.02×10²³ molecules. This implies that 1 mole of ozone contains 6.02×10²³ molecules.

If 1 mole of ozone contains 6.02×10²³ molecules,

therefore, 1.67×10¯⁴ mole of ozone will contain = 1.67×10¯⁴ x 6.02×10²³ = 1.01×10^20 molecules.

Therefore, 1.01×10^20 molecules of ozone are present in 2 L of air.

The Young's Modulus of the wire of length 50 cm is 4.0×10⁵ N/m.

Young's modulus is a measure of the ability of a material to withstand changes in length when under lengthwise tension or compression.

To calculate the young's modulus of the wire, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the Young's Modulus is 4.0×10⁵ N/m.

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The correct answer is option B. This statement is false.

Antoine Lavoisier in the year 1789 gave few of his postulates.

One of the major discovery was based on mass. He said "mass can never be created nor destroyed, it remains the same all time".

This was a major discovery that outlined the figure of mass as constant.

With this discovery he also gave a postulates about mass in chemical reaction.

In chemical reaction, there are many irreversible changes takes place and many times it is forming a whole new product.

In such condition also mass remains the same.

This is how the conservation of mass came into light.

The law states that "in chemical reaction the mass can never be changed. The mass of product will be the mass of reactants, only, the form might change."

For example, if we take 5 g of salt and 25 ml water as reactants and we mix them together then after mixing them together the salt will be 5 g only and the water will also remain 25 ml.

This is the law of conservation of mass which states mass of reactants is equal to the mass of product. And thus, the statement given in the question is false.

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Answer: 2 seconds

Explanation:

Since I've only memorized a couple of formulas for these things, I need to do the time first:

I'll use the formula  Distance = (1/2) (acceleration) (time)²

20 m = (1/2) (10 m/s²) (time)²

Time² = (20 m) / (5 m/s²)

Time² = 4 sec²

Time = 2 seconds

Now ...

-- When the ball hits the ground, it has been falling for 2 seconds.

-- Its acceleration has caused its speed to increase by 10 m/s every second.

-- So after 2 seconds, its speed has grown to (2 s) (10 m/s²) = 20 m/s .

if you increase the pressure on a sprinkler nozzle from 46 psi to 66 psi, the new flow rate will be approximately 32.496 gallons per minute, assuming a flow rate coefficient (K) of 4.0.

Q = K * √(P)

where sqrt(P) is the square root of the pressure in psi.

Using this formula, we can calculate the new flow rate as follows:

New flow rate = 4.0 * √(66) = 4.0 * 8.124 = 32.496 gallons per minute (approx.)

Pressure is a physical quantity that describes the force exerted per unit area. It can be defined as the amount of force applied to a given area or surface. Pressure is typically measured in units of Pascals (Pa), which is equivalent to one Newton per square meter (N/m²).

Pressure can be exerted by any type of matter, including gases, liquids, and solids. For example, the pressure of the air around us is the result of the weight of the atmosphere pushing down on the surface of the Earth. In general, pressure increases with increasing depth in a fluid or with increasing force applied to a surface. It also varies with temperature and can be affected by the properties of the material being measured.

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Answer:

An apple in free fall accelerates toward the Earth with a free fall acceleration, g. The force of the apple on the Earth also causes the Earth to accelerate toward the falling apple. By Newton's Third Law, the force of the Earth on the apple is exactly equal and opposite to the force of the apple on the Earth. By Newton,s Second law, the force of the Earth on the apple is equal to the mass of the apple times g , the accelerations due to gravity. And, the force of the the apple on the Earth is equal to the mass of the Earth times the acceleration of the Earth toward the apple. In conclusion, the magnitude of the forces are equal, or

F ( apple on the Earth) = F( the Earth on the apple) or

M( mass of the earth) x a( the acceleration of the earth toward the apple) = m(mass of the apple) x g( the acceleration of the apple toward the Earth) or

a = (m/M) g

Explanation:

Answer:

I. Speed = 20m/s

II. Velocity = 20m/s due North.

Explanation:

Given the following data;

Distance = 40m

Time = 2secs

To find the speed;

Mathematically, speed is given by the formula;

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

Substituting into the equation, we have;

\(Speed = \frac{40}{2}\)

Speed = 20m/s.

In physics, we use the same formula for calculating speed and velocity. The only difference is that speed is a scalar quantity and as such has magnitude but no direction while velocity is a vector quantity and as such it has both magnitude and direction.

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

Therefore, the velocity is 20m/s due North.

Main components with their percentage by volume of soil are mineral particles (45%), organic matter (5%), water (25%), and air (25%).

1. Mineral particles: Approximately 45% of soil volume. These include sand, silt, and clay particles, which are the result of weathering and disintegration of rocks.
2. Organic matter: Approximately 5% of soil volume. Organic matter consists of decomposed plant and animal residues, microbes, and humus, which is a complex, stable, and dark-colored organic substance.
3. Water: Approximately 25% of soil volume. Water is present in soil pores and is essential for plant growth and nutrient availability.
4. Air: Approximately 25% of soil volume. Air fills the spaces between soil particles and provides oxygen for plant roots and soil microbes.
In summary, the main components of soil are mineral particles (45%), organic matter (5%), water (25%), and air (25%).

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