Only for people who know the answer to this question fully can answer this others please leave this question.So, Variation is caused by what two factors...????
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The formula for calculating density is expressed as

Density = mass/volume

From the information given,

mass of empty pycnometer = 10.2

mass of the same pycnometer with an unknown liquid is 21.8.

Mass of unkown liquid = 21.8 - 10.2 = 11.6

volume of unknown liquid = 7

Thus,

Density = 11.6/7

Density = 1.7 g/ml

For a pair of narrow, parallel slits separated by 0.265 nm, illuminated by green light (λ=544nm) and observed on a screen 1.43m away from the slits.      

The distance (a) between the central maximum and the first bright region on either side of it can be calculated using the formula: a = (λD)/d, where λ is the wavelength of the light, D is the distance between the screen and the slits, and d is the distance between the slits. Substituting the given values, we get a = \((544 *10^(-9) *1.43)/0.265 = 2.94 * 10^(-3) m.\)

Similarly, the distance (b) between the first and the second dark bands in the interference pattern can be calculated using the formula: b = (λD)/d, where λ, D, and d have the same meaning as before. However, in this case, we need to calculate the distance between the first and the second dark bands, which corresponds to the distance between the central maximum and the first bright band on either side of it. Therefore, we can use the same value of D and d as before and substitute λ = (2n-1)λ/2, where n is the order of the dark band. Substituting the values for n=1 and n=2, we get b = [(3/2)λD]/d .

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Answer:

C. A quantity with magnitude and a direction.

Explanation:

A vector can be defined as a quantity with magnitude and direction. Some examples of vector quantities are velocity, position, displacement, force, torque, acceleration.

For example, given the following data;

Time, t = 18.5secs

Final velocity = 78m/s

Initial velocity = 0

Substituting into the equation;

\(a = \frac{78 - 0}{18.5}\)

\(a = \frac{78}{18.5}\)

Acceleration, a = 4.22m/s²

Therefore, the acceleration of the object is 4.22m/s² due North.

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

\(a = \frac{v - u}{t}\)

Where,

a is acceleration measured in \(ms^{-2}\)

v and u is final and initial velocity respectively, measured in \(ms^{-1}\)

t is time measured in seconds.

Answer:

C. A quantity with magnitude and a direction.

Explanation:

A physical Quantity, which has magnitude, direction and units But must follow the traingle law of vector addition

Mutations occur in the genetic material due to alterations in the sequence of nucleic acids of the genome. Mutations are harmful as they lead to many disorders and conditions which are life-threatening.

A mutation can be defined as an alteration in the sequence of nucleic acids of the genome of a living organism, virus, or the extrachromosomal DNA material such as the mitochondrial DNA or the chloroplast DNA. Viral genomes are different from that of other living organisms as they contain either DNA or RNA as genetic material.

The guanine-thymine (G-T) mutation is the single most common mutation which occurs in the DNA of human. This mutation occurs about once in every 10,000 to 100,000 base pairs in the DNA.

Mutations are of different types. From which, the deletion mutations are opposite types of point mutations. These mutations involve the removal of a base pair from the sequence. Both of these mutations lead to the creation of one of the most dangerous type of point mutations which is known as the frameshift mutation.

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Answer:

Distance: 1600 m Displacement: 0

Explanation:

The distance is because He ran 400 meters 4 times getting 1600 m

4*400=1600

The displacement is 0 because displacement is the total distnce away from the starting point and since he ran laps around the track in the end he ended up in the same spot as last time.

Answer:

A net force greater than 0 is the answer

Explanation:

trust

Answer:

b c

Explanation:

The distance from the source to point p will be 2.45 meters.

According to the inverse square law, the intensity of sound waves from a point source decreases with the square of the distance from the source. Thus, we can use the formula for sound intensity level (IL) in decibels:

IL = 10 log10(I/I0)

where I is the sound intensity at the point of interest, and I0 is the reference intensity (I0 = 1.0 x 10^-12 W/m^2).

Let's call the distance from the source to point P "d". Then, we can set up the following equation based on the information given:

ILP = ILS - 13

where ILP is the sound intensity level at point P, and ILS is the sound intensity level at the point 1.50 m from the source.

Using the inverse square law, we can relate the intensities at these two points:

ILP = ILS + 10 log10(d^2/1.50^2)

Substituting the first equation into the second, we get:

ILS - 13 = ILS + 10 log10(d^2/1.50^2)

Solving for d, we find:

d = 2.45 m

Therefore, the distance from the source to point P is approximately 2.45 meters.

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Taking into account the definition of density, the volume of the sample of gold is 0.0646998 L.

Density is defined as the property that allows us to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Replacing in the definition of density:

19.32 g/cm³= 1250 g÷ volume

Solving:

19.32 g/cm³× volume= 1250 g

volume= 1250 g÷ 19.32 g/cm³

volume= 64.6998 cm³= 0.0646998 L (1 cm³= 0.001 L)

In summary, the volume of the sample of gold is 0.0646998 L.

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Answer:yea

Explanation:

Answer: The motion of the object will remain the same

Explanation:

Answer:

W = F × d

W = 15 × 3

W = 45 Joules

When the book is at the point where there is 4 J of gravitational potential energy in the system, the total amount of energy in the system will still be 5 J, since energy cannot be created or destroyed, only transformed from one form to another.

At this point, the energy in the system will consist of two forms: gravitational potential energy and kinetic energy. The 4 J of gravitational potential energy is due to the book's position relative to the floor, and is equal to the work done by gravity in lifting the book from the floor to its initial position on the table. As the book falls, this potential energy is converted into kinetic energy, which is the energy of motion. The kinetic energy of the book increases as it falls, until it reaches the floor, at which point all of the potential energy has been converted into kinetic energy.

Therefore, at the point where there is 4 J of gravitational potential energy in the system, the remaining 1 J of energy in the system will be in the form of kinetic energy.

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The complete question is:

Study the scenario. A book falls off a table and lands on the floor. The isolated system consists of the book and the floor, and ignores air resistance. The amount of energy in the system is 5 J when the book is sitting on the table. At some point during its fall, there is 4 J of gravitational potential energy in the system. Which choice best describes the amount and form of energy in this system when the book is at this point?

a) 5J

b) 4J

c) 9J

d) cant say

Answer:

the answer is C

Explanation: comparing a face to a model would not me accurate on a computer, if you had a physical model it would be accurate. hope this helps!!

Answer:

The answer is A

Explanation:

bevause i got that wrong on apex

(a) Using conservation of energy, the velocity of the ball at the top of the ramp is 3.9 m/s.
(b) When the height of the ramp is 1 m, the ball does not make it to the top of the ramp

Given,

Height of the ramp, h = 0.75 m
Initial velocity of the center of mass, u = 4.2 m/s

(a) What is its velocity at the top of the ramp?

The bowling ball rolls up a ramp of height 0.75 m without slipping to storage, and it has an initial velocity of its center of mass of 4.2 m/s. It is asked to determine the velocity of the ball at the top of the ramp.
Let the velocity of the ball at the top of the ramp be v.
By the law of conservation of energy, the potential energy of the ball at the bottom of the ramp is equal to the kinetic energy of the ball at the top of the ramp.
PE at the bottom of the ramp = KE at the top of the ramp

mgh = (1/2)mu² + (1/2)Iω²

where
m = mass of the ball
g = acceleration due to gravity
I = moment of inertia of the ball
ω = angular velocity of the ball

Assuming the ball is a solid sphere,

I = (2/5)mr²

where r is the radius of the sphere
At the bottom of the ramp,
PE = mgh
At the top of the ramp,
KE = (1/2)mu² + (1/2)(2/5)mu²
Substituting the given values,
PE = mgh = 0.75mg
KE = (1/2)mu² + (1/2)(2/5)mu²
= (1/2)(7/5)mu²
= (7/10)mu²

At the top of the ramp,

PE = KE
0.75mg = (7/10)mu²
v = u * √(7/10)
= 4.2 * √(7/10)
≈ 3.9 m/s

Therefore, the velocity of the ball at the top of the ramp is approximately 3.9 m/s.

(b) If the ramp is 1 m high does it make it to the top?

When the height of the ramp is 1 m,
PE = mgh = 1mg
At the top of the ramp,
KE = (1/2)mu² + (1/2)(2/5)mu²
= (1/2)(7/5)mu²
= (7/10)mu²

At the top of the ramp,

PE = KE
1mg = (7/10)mu²
u² = (10/7)gh
v = u * √(7/10)
= √(10gh/7)
≈ 3.96 √h m/s

Therefore, when the height of the ramp is 1 m, the ball does not make it to the top of the ramp.

Using the law of conservation of energy, the velocity of the ball at the top of the ramp is found to be approximately 3.9 m/s. When the height of the ramp is increased to 1 m, the ball does not make it to the top of the ramp.

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The value of the resistor of five parallel-connected resistors is R/5 ohm. Hence, 5 resistors of resistance R/25 ohm connected in series to give an equivalent resistance to five resistors connected in parallel

Modern resistors are often constructed from a carbon, metals, or metal-oxide layer. In these resistors, an insulating material is covered in a helix around a thin layer of conductive (but still resistant) material.

A resistor is a component of an electronic device that regulates or limits the amount of electrical current that can flow through a circuit. Resistors can also supply a certain amount of power to an electronic appliance like a transistor. A light bulb illuminates when power is applied to the resistor tungsten. The end results of the energy are heat and light.

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The acceleration of the baseball is approximately 41.379 m/s².

When a baseball player hits a baseball, the force exerted on the ball causes it to accelerate. To find the acceleration of the baseball, we can use Newton's second law of motion, which states that force is equal to mass multiplied by acceleration (F = ma).

In this case, the force exerted by the baseball player is given as 6 N, and the mass of the baseball is 0.145 kg. We can rearrange the formula to solve for acceleration:

a = F / m

Substituting the given values:

a = 6 N / 0.145 kg

Now, let's calculate the acceleration:

a ≈ 41.379 m/s²

Therefore, the acceleration of the baseball is approximately 41.379 m/s².

In the given answer choices, the correct option is B. 41.4 m/s².

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Answer:

Charge quantization is the principle that the charge of any object is an integer multiple of the elementary charge.

Explanation:

to find the frequencies of the fundamental and the first two overtones for the guitar string with given parameters.

First, let's determine the linear density (μ) of the string:
μ = (mass of the string) / (length of the string)
μ = (3.00 g) / (90.0 cm)
μ = 0.0333 g/cm (convert to kg/m for SI units)
μ = 0.00333 kg/m

Next, we need to find the wave speed (v) on the string:
v = √(Tension / Linear Density)
v = √533 N / 0.00333 kg/m)
v = √(160060.060060 N/kg)
v = 400 m/s

Now we can calculate the frequencies of the fundamental (f1) and the first two overtones (f2 and f3) using the formula:
f = (n × v) / (2 × L)

For the fundamental (n = 1) and the effective length L=60.0 cm (0.6 m):
f1 = (1 × 400 m/s) / (2 × 0.6 m) = 333.33 Hz

For the first overtone (n = 2):
f2 = (2 × 400 m/s) / (2 × 0.6 m) = 666.67 Hz

For the second overtone (n = 3):
f3 = (3 × 400 m/s) / (2 × 0.6 m) = 1000 Hz

In conclusion, the frequencies of the fundamental and the first two overtones for the given guitar string are approximately 333.33 Hz, 666.67 Hz, and 1000 Hz, respectively.

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The light will be refracted at an angle of approximately 27.18 degrees relative to the normal inside the glass-bottomed boat.

When a diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30 degrees relative to the normal, the light will undergo refraction as it passes from water to glass.

Refraction occurs when light travels from one medium to another with a different refractive index, causing the light rays to change direction. The amount of refraction is determined by Snell's Law, which states:

n₁sin(θ₁) = n₂sin(θ₂)

Where:

n₁ = refractive index of the initial medium (water)

n₂ = refractive index of the second medium (glass)

θ₁ = angle of incidence relative to the normal

θ₂ = angle of refraction relative to the normal

In this scenario, the light travels from water (with a refractive index of approximately 1.33) to glass (with a refractive index typically around 1.5). Assuming an angle of incidence of 30 degrees relative to the normal, we can calculate the angle of refraction using Snell's Law.

n₁sin(θ₁) = n₂sin(θ₂)

(1.33)sin(30°) = (1.5)sin(θ₂)

0.665 ≈ 1.5sin(θ₂)

sin(θ₂) ≈ 0.665 / 1.5

sin(θ₂) ≈ 0.443

θ₂ ≈ arcsin(0.443)

θ₂ ≈ 27.18°

Therefore, the light will be refracted at an angle of approximately 27.18 degrees relative to the normal inside the glass-bottomed boat.

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Answer:A

Explanation:

Answer: A)The speed of light in a vacuum is constant, and nothing is faster than the speed of light.

Explanation:

Answered Correctly on Edg.

The ratio of the gravitational force of the Sun to the gravitational force of the Earth on the Moon when the average Sun-Moon distance is equal to the Sun-Earth distance is 360,000.

The gravitational force is defined as the attractive force between two objects with mass. It is proportional to the product of their masses and inversely proportional to the square of the distance between them. Therefore, the formula for the gravitational force is:

F = G × m1 m2/d²

Where

F is the gravitational force,

G is the gravitational constant,

m1 and m2 are the masses of the two objects, and

d is the distance between them.

Now, let's consider the Moon's gravitational attraction to the Sun and the Earth, respectively.

Let F sun be the gravitational force of the Sun on the Moon, and F earth be the gravitational force of the Earth on the Moon. Both of these gravitational forces are described as:

F sun = G × M sunM moon/Ds²

Fearth = G × M earth M moon/De²

Where M sun, M earth, and M moon are the masses of the Sun, Earth, and Moon, respectively.

Ds is the distance between the Sun and the Moon, while De is the distance between the Earth and the Moon.

The average Sun-Moon distance is equal to the Sun-Earth distance, meaning that Ds = De.

Therefore, we can express the ratio of the gravitational force of the Sun to the gravitational force of the Earth on the Moon as follows:

F sun/F earth = (G × M sun M moon/Ds²)/(G × M earth M moon/De²)

= (M sun/M eart) × (De/Ds)²

= (1.99 × 1030/5.97 × 1024) × (149.6 × 106/384,400)²

= 360,000

Therefore, the ratio of the gravitational force of the Sun to the gravitational force of the Earth on the Moon when the average Sun-Moon distance is equal to the Sun-Earth distance is 360,000.

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Answer:

1. Flexibility.

2. Muscular Fitness

3. Cardiovascular Fitness

4. Cardiovascular Fitness

5. Flexibility

6. Muscular Fitness

7. Cardiovascular Fitness

Answer:

Explanation:

No, not any of these substance will float in Methanol , simply because Methanol has a density of 0.79 g, if you put any substance that weighs more than 0.79 g, it will sink, it all depends on the weight if it is more or less than methanol  

2: D=m/v

D=135/50 = 2.7 g/cm³ ( Aluminum)

D=M/V

if two objects has the same mass but one has larger volume, then te one with larger volume has less density

example : 2 objects

mass of both=350

volume of the first one=500 and  the other 750

D1=M1/V1 = 350/500 =0.7

D2 = M2/V2 = 350/750 = 0.4666

D1 is larger than D2( with larger volume )

When there is current flowing through the apparatus or electrical circuit and the source voltage or source battery experiences a voltage drop, internal resistance is present.

The voltage across the ideal voltage source is equal to the voltage at the terminals when there is no current flowing to an external resistance. However, there will be a voltage drop across the internal resistance when current leaves the cell, which will reduce the voltage at the cell's terminals.

The electromotive force within a cell is always greater than the potential difference between neighboring cells. Thus, variables like the distance between the electrodes, their effective area, temperature, and solution concentration affect a cell's internal resistance.

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This motion of the balloon is an example of buoyancy, which is the upward force exerted by a fluid on an object immersed in it.

When the balloon is neutrally buoyant, it means that the weight of the balloon and the weights attached to it is equal to the weight of the water displaced by the balloon.

If you push the balloon down to a greater depth and then release it, the balloon will rise back up to its original position.

This is because the balloon is still partially inflated and contains air, which is less dense than water. When you push the balloon down, the water pressure compresses the air in the balloon, causing it to become smaller in size.

When you release the balloon, the compressed air expands and pushes the balloon upwards towards the surface of the water.

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The density of the goose can be determined by dividing its weight by the volume of the portion of the goose submerged in water.

To calculate the density of the goose, we can use the relationship between weight, volume, and density. Density is defined as mass divided by volume (ρ = m/V). In this case, the weight of the goose is given as 3.6 kg, which is equivalent to the mass (m) of the goose.

We are also provided with information that 49% of the goose's body is below the water level. This means that 49% of the goose's volume is submerged in water.

Let's denote the total volume of the goose as V_total and the volume submerged in water as V_submerged. Since 49% of the goose's body is below the water level, we can write the following relationship:

V_submerged = 0.49 * V_total

Now, we can calculate the density of the goose by dividing the weight (m) by the submerged volume (V_submerged):

Density (ρ) = m / V_submerged

Substituting the given values, we have:

Density (ρ) = 3.6 kg / (0.49 * V_total)

However, the volume of the goose (V_total) is not provided in the given information, so we cannot calculate the exact density without this value.

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The major difference between a bimetallic stemmed thermometer and a thermistor is the principle of temperature measurement they utilize.

A bimetallic stemmed thermometer consists of two different metals bonded together. These metals have different coefficients of thermal expansion, causing the strip to bend when exposed to temperature changes. The degree of bending is proportional to the temperature, allowing the measurement of temperature based on the mechanical deformation of the bimetallic strip.

On the other hand, a thermistor is a type of temperature sensor that relies on the change in electrical resistance with temperature. Thermistors are typically made of semiconductor materials that exhibit a significant change in resistance as the temperature varies. The resistance of a thermistor decreases as the temperature increases, and vice versa. This change in resistance is used to measure and indicate the temperature.

In summary, while a bimetallic stemmed thermometer operates based on the mechanical deformation of a bimetallic strip, a thermistor measures temperature by monitoring the change in electrical resistance. Each type of thermometer has its advantages and applications based on the specific temperature range, accuracy requirements, and sensitivity needed in various contexts.

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