172) suppose that a heavy person and a light person are balanced on a teeter- totter made of a plank of 172) wood. each person now moves in toward the fulcrum a distance of 25 cm. what effect will this have on the balance of the teeter- totter?

Answer: The magnification of the image is 0.50. This means the image is half the size of the object.

Explanation:

The magnification (m) of an image produced by a mirror is given by the ratio of the image distance (di) to the object distance (do). The formula is:

\($$m = -\frac{di}{do}$$\)

In this case, the object distance (do) is 18 cm and the image distance (di) is -9 cm (the negative sign indicates that the image is virtual and located behind the mirror). Substituting these values into the formula, we can calculate the magnification.

The magnification of the image is 0.50. This means the image is half the size of the object.

A tank filled with manure, water, and unused crop plant residues, but with minimal oxygen content, can be used for a process known as anaerobic digestion.

Microorganisms, especially methanogenic bacteria, break down the organic matter into simpler compounds such as fatty acids and sugars through a process called hydrolysis.

Now, let's examine the role of oxygen in anaerobic digestion. Therefore, minimizing the oxygen content in the tank is crucial for the success of the anaerobic digestion process.

To ensure that the tank has minimal oxygen content, it is usually sealed to prevent air from entering. Additionally, the contents of the tank are mixed regularly to promote the growth and activity of the methane-producing microorganisms while ensuring that oxygen levels remain low.

A tank filled with manure, water, and unused crop plant residues but with minimal oxygen content can be used for anaerobic digestion, a process that breaks down organic matter into biogas and digestate.

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The direction of the net velocity of the car is 15 m/s due west.

The change in velocity of an object is the rate at which the velocity of the object changes with time.

The change in the velocity of the car is calculated as follows;

Δv = vf - vi

where;

The given parameters;

Δv = 5 m/s - 20 m/s

Δv =  - 15 m/s

Thus, the direction of the net velocity of the car will be due west.

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The net force is (40 Newtons) (down the road).

But 40 Newtons is not going to move a piano very enthusiastically.

The star is located at a distance of 31.62 parsecs from us.

To determine the distance of the star, we need to use the inverse square law, which states that the apparent brightness of a star decreases as the square of its distance increases. Mathematically, it can be represented as:
Apparent brightness ∝ 1/Distance²
Given that the star's apparent brightness is 10⁻⁴ times its absolute brightness, we can write:
Apparent brightness = Absolute brightness/ (Distance)²
10⁻⁴ = Absolute brightness/ (Distance)²
Solving for distance, we get:
Distance = √(Absolute brightness/10⁻⁴)
However, we don't have the value of absolute brightness. But we can use the information that the star is observed to have an apparent magnitude of 10. Since apparent magnitude is a logarithmic scale, we know that a difference of 5 magnitudes corresponds to a difference of 100 times in brightness. Therefore, the star's absolute magnitude can be calculated as:
Absolute magnitude = Apparent magnitude - 5 log(distance/10)
Substituting the values, we get:
10 = Absolute magnitude - 5 log(distance/10)
Absolute magnitude = 10 + 5 log(10⁻⁴) = 14
Therefore, the distance can be calculated as:
Distance = 10^(1+((Apparent magnitude - Absolute magnitude)/5))
= 10^(1+((10 - 14)/5))
= 31.62 parsecs
Thus, the star is located at a distance of 31.62 parsecs from us.

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If the voltage source or EMF is removed from a conductor, the electron flow within the conductor will eventually stop.

This is because the voltage source creates an electric field that causes the free electrons in the conductor to move, creating an electric current. When the voltage source is removed, the electric field disappears, and the free electrons in the conductor will no longer have a driving force to move them. As a result, the electrons will begin to lose energy and eventually come to a stop, leading to the cessation of the electric current.

It's worth noting that the time it takes for the electron flow to stop depends on various factors such as the resistance of the conductor, the capacitance of the circuit, and the amount of charge stored in any capacitors present in the circuit.

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Answer:  Make the frequency higher for number 1 and have the same amplitude.

Explanation: Wavelength and frequency are directly related so if you change one of those then you can't keep the other one the same. You would need to raise the frequency which would make 1 louder and keep amplitude the same for both so that 1 is louder.

To make the sounds match in pitch while making sound wave 1 louder than sound wave 2 : Increase the frequency for wave #1 while setting their amplitudes at the same value

The wavelength of a sound wave is inversely proportional to its frequency therefore when the frequency of wave 1 is increased its wavelength decreases with equal proportion.

Since the increase in frequency results to a decrease in wavelength. therefore to make wave 1 louder, both waves we will have to set the amplitude values of the waves at the same amplitude.

Hence we can conclude that to make the sounds match in pitch while making sound wave 1 louder than sound wave 2 ; Increase the frequency for wave #1 while setting their amplitudes at the same value.

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The amount of energy that must be absorbed by the 150g sample of ice at 0.0°C is 131,873.55 J.

To calculate the amount of energy that must be absorbed by a 150g sample of ice at 0.0°C, we need to consider two processes: heating the ice from -273.15°C to 0.0°C and melting the ice at 0.0°C.

1. Heating the ice:

The specific heat capacity of ice is 2.09 \(\frac{J}{g ^\circ C}\), and the temperature change is 0.0 - (-273.15) = 273.15°C.

\(Q_1\) = (mass) × (specific heat capacity) × (temperature change)

\(Q_1\) = 150g × 2.09 × 273.15°C

\(Q_1\) =81,773.55 J

2. Melting the ice:

The heat of fusion (enthalpy of fusion) for ice is 334 J/g.

\(Q_2\) = (mass) × (heat of fusion)

\(Q_2\) = 150g × 334 J/g

\(Q_2\) = 50,100 J

The total energy required is the sum of Q1 and Q2:

Total energy = \(Q_1\) + \(Q_2\)

Total energy = 81,773.55 J + 50,100 J

Total energy = 131,873.55 J

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While both the rubbing stuff and batteries involve the generation and use of electrical energy, they differ in their underlying mechanisms and practical applications.

When it comes to comparing the rubbing stuff to a battery, there are a few key differences to consider. Firstly, the rubbing stuff, which is often referred to as static electricity, is generated through friction between two different materials.

This process creates a build-up of electrical charges, which can then be discharged through a spark or shock. In contrast, a battery generates electricity through a chemical reaction between two different materials, typically a metal and an electrolyte.

Another key difference is that while the rubbing stuff is often a temporary phenomenon, as the charges will dissipate over time, a battery can provide a continuous source of power as long as it has sufficient charge.

Additionally, a battery can be recharged and reused, whereas the rubbing stuff is generally a one-time occurrence.
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Yes, it will be safe to have the turbine component operate at 1150°C

Based on the given information, the melting temperatures of iron and titanium are 1538°C and 1668°C, respectively. In an iron-titanium alloy, these two elements are combined, resulting in an intermediate melting temperature. This alloy would have a higher melting temperature than pure iron and lower than pure titanium.

Operating the turbine engine at 1150°C would be safe, as this temperature is significantly below the melting temperatures of both elements. It provides a sufficient margin of safety for the alloy, ensuring that it remains solid and stable during operation. Additionally, alloys typically have improved mechanical properties, such as increased strength and resistance to wear, compared to their constituent elements. This makes iron-titanium alloys suitable for high-temperature applications like turbine engines.

In summary, using an iron-titanium alloy for a turbine engine operating at 1150°C should be safe and appropriate due to its enhanced mechanical properties and melting temperature range.

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Answer:

The outside layer is the wettest.

Explanation:

The light from the bottom slit travels one wavelength (500nm) farther compared to the light from the top slit to reach the second bright fringe.

In a two-slit interference experiment, the bright fringes are formed due to constructive interference between the light waves from the two slits. The path difference between the waves from the two slits determines the position of the fringes. For the second bright fringe below the center line, the path difference is equal to one wavelength. Since the light has a wavelength of 500nm, the light from the bottom slit travels an additional 500nm compared to the light from the top slit to reach this fringe. The light from the bottom slit travels one wavelength (500nm) farther compared to the light from the top slit to reach the second bright fringe below the center line in a two-slit interference experiment using 500nm light.

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If you know the total current and  voltage across the circuit, then you can find the total resistance using the Ohm's Law, that is : R = V / I.

In a series-parallel circuit, one can find the total resistance of circuit by calculating resistance of each parallel section and then adding reciprocals of these values to obtain total resistance of parallel section. Next, you can add series resistances to this total resistance to obtain single resistance for entire circuit.

In series the total resistance is equal to the sum of the resistors. In parallel,  inverse of the total resistance is equal to the the sum of the inverse of each individual resistor.

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: How is resistance calculated in a series-parallel circuit?

To find the length of the wave if its speed is 54 km/h, we can use the formula:

Wavelength = Speed / Frequency

where the frequency of the wave is equal to the inverse of the oscillation period. The oscillation period of the wave is 0.5 minutes, so the frequency is 1 / (0.5 minutes) = 2 oscillations/minute.

We can now plug these values into the formula to find the wavelength:

Wavelength = 54 km/h / (2 oscillations/minute)

= 27 km

Therefore, the length of the wave is 27 km

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Answer:

using good judgement

Explanation:

Answer:

False

Explanation:

Electrons

Answer:

a. 2:3

b. The data illustrates the law of multiple proportions by showing that the the masses of oxygen that reacts with a fixed mass of sulfur are in a ratio of small whole numbers

Explanation:

The weight of oxygen that combines with 32.06 grams of sulfur in sulfur dioxide = 32 grams

The weight of oxygen that combines with 32.06 grams of sulfur in sulfur trioxide = 48 grams

a. The ration of the weights of oxygen that combine with 32.06 g of sulfur = 32:48 = 2:3

b. The law of multiple proportions states that when two elements are able to interact chemically to form more than one compound, then the (different) weights of one of the element that combines with a fixed weight of the other element are in small whole number ratios

The data demonstrates the law of multiple proportions by showing that the ratios of the weights of oxygen that combine with a fixed weight of sulfur to form sulfur dioxide and sulfur trioxide is in the ratio of 2 to 3 which are small whole number ratios

Answer:

A. 420 J

Explanation:

Given the following data;

Mass = 30.45 g

Specific heat capacity = 4.18 J/g °C.

Temperature = 3.3°C

To find the quantity of heat;

Heat capacity is given by the formula;

\( Q = mct \)

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

t represents the temperature.

Substituting into the equation, we have;

\( Q = 30.45 * 4.18 * 3.3 \)

Q = 420.03 ≈ 420 Joules

Answer:

a = 6.4 [m/s²]

Explanation:

To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration. In this way, we have the following equation.

∑F = m*a

where:

∑F = sum of forces (horizontal force = 40 [N] and friction force = 8 [N])

m = mass of the block = 5 [kg]

a = acceleration [m/s²]

Now replacing:

\(40-8=5*a\\32 = 5*a\\a=6.4[m/s^{2} ]\)

Note: the sign of the friction force is negative since this force is acting against the movement of the block.

Answer:

C. Equal to 0

Explanation:

voltage is only produced when the magnet is in motion. Hope this helps :)

The average force acting on the car is 1000 N.

The definition of force in physics is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

Given that: A 600-kg car is moving at 5 m/s then comes to a stop in 3 seconds.

Now according to Newton's 2nd law of motion:

Magnitude of force applied on the body = change in momentum/time interval

= I final momentum - initial momentum I/time interval

= I 0 - 600×5 I /3 N

= 10000 N

Hence, average force acting on the car is 1000 N.

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The height of the image of the car in the spherical convex mirror is 1.328 m.

A spherical convex mirror is a type of curved mirror that has a bulging shape, with the center of the curve facing outwards. The surface of the mirror is curved like a sphere, with a single point of curvature, which is called the center of curvature. The center of curvature is located at a distance equal to the radius of curvature (R) from the mirror's surface.

The height of the image of an object in a convex mirror can be found using the mirror equation. The mirror equation relates the object distance (d_o), the image distance (d_i), and the radius of curvature (R) of the mirror.

The mirror equation is given by:

1/d_o + 1/d_i = 2/R

In this case, the object distance is 11 m, and the radius of curvature is 0.847 m, so we can substitute these values into the equation and solve for the image distance:

1/11 + 1/d_i = 2/0.847

d_i = 0.847 / (2/11 - 1/11)

d_i = 0.847 / (1/11)

d_i = 9.317 m

Next, we can use the magnification formula to find the height of the image:

magnification (m) = height of image (h_i) / height of object (h_o) = d_i/ d_o

So, the height of the image is:

h_i = m * h_o

h_i = (d_i / d_o) * h_o

h_i = (9.317 / 11) * 1.6

h_i = 1.328 m

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Answer:

.. answer explamkn

Explanation:

The time required to generate a 410 J of energy if a power of 82 W is used by the air conditioner is 5.0 seconds,

Power is the quantity of energy transferred per unit time. It can be expressed as;

Power = Energy / Time

Given the data in the question;

To determine the time needed, plug the given values into the formula above and solve for time.

Power = Energy / Time

Time = Energy / Power

Time = 410kgm²/s² / 82kgm²/s³

Time = 5.0s

Therefore, the required time is 5.0 seconds.

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The correct answer is option D) When the fox eats an animal that eats plants, it receives energy indirectly from the sun.

Energy in a food chain flows from the sun, to the producers (plants), to the primary consumers (herbivores), to the secondary consumers (carnivores), and so on. Omnivores, such as foxes, consume both plants and animals, but they typically obtain more of their energy from consuming other animals.

When a fox eats an animal that eats plants, it is receiving energy indirectly from the sun. The plants that the prey animal consumed converted the energy from the sun into organic molecules through the process of photosynthesis. The prey animal then consumed those plants and converted the organic molecules into its own tissues. When the fox eats the prey animal, it is obtaining the energy stored in the prey's tissues.

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The weight of the astronaut on Earth is 637 N. This means that the force with which the astronaut is being pulled towards the center of the Earth is 637 N.

The weight of an astronaut on Earth is determined by multiplying their mass by the gravitational field strength. In this case, the astronaut has a mass of 65 kg and the gravitational field strength on Earth is 9.8N/kg.

Therefore, the weight of the astronaut on Earth can be calculated by multiplying their mass by the gravitational field strength:
Weight = mass x gravitational field strength
Weight = 65 kg x 9.8 N/kg
Weight = 637 N
Therefore, the weight of the astronaut on Earth is 637 N. This means that the force with which the astronaut is being pulled towards the center of the Earth is 637 N.

However, it is important to note that weight is not the same as mass.

Mass is a measure of the amount of matter in an object, while weight is a measure of the force with which an object is being pulled towards the center of the Earth due to gravity.

This means that an astronaut would have the same mass on Earth as they would in space, but their weight would be different due to the varying gravitational field strength.

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Answer:

yeah

Explanation:

the answer is right.

Answer:

5 Components of Physical Fitness

Cardiovascular Endurance.

Muscular Strength.

Muscular endurance.

Flexibility.

Body Composition.

Answer:

is a force that attracts any two objects with a mass

1. Adam's displacement during the chase can be calculated by adding the individual displacements of James and Nick, since Adam is standing in between them.

The displacement of James is 32 m [E], which means he is 32 meters to the east of the flagpole. The displacement of Nick is unknown.

To find Adam's displacement, determine the direction and distance he moved relative to the flagpole. Since he is standing 17 m [W] of the flagpole, his displacement is 17 m to the west.

Therefore, Adam's displacement during the chase is:

Displacement = 17 m [W] + Nick's displacement

2. The vertical component of the monkey's velocity can be found using trigonometry.

Given: Initial velocity (v) = 69 km/h, Angle (θ) = 12°

The vertical component of velocity (v_y) can be calculated using the following formula:

v_y = v × sin(θ)

where sin(θ) = sine of the angle θ.

Converting the initial velocity to meters per second (m/s) and the angle to radians:

v = 69 km/h = 19.17 m/s

θ = 12° = 0.21 radians

Substituting these values in the formula:

v_y = 19.17 m/s × sin(0.21) = 4.21 m/s  

Therefore, the vertical component of the monkey's velocity is 4.21 m/s.

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