Is there any difference between frame of reference and reference point in physics?​

Answer:

8. GPE

9. KE

Explanation:

GPE=mgh

KE=(1/2)mv^2

Answer:

  40.3 °C

Explanation:

The volumetric coefficient of expansion of methanol is reportedly about 0.00149/K at 20 °C. Ordinarily, these coefficients vary with temperature, but we'll assume it is constant and that the expansion is linear with temperature.

Then we want to find the change in temperature ΔT such that ...

  95%(1 +0.00149·ΔT) = 100%

  0.0014155·ΔT = 0.05 . . . . simplify, subtract 95%

  ΔT = 0.05/0.0014155 ≈ 35.3

Adding this temperature change to the original 5 °C tells us the beaker will be full with methanol if heated to ...

  5 °C +35.3 °C = 40.3 °C

_____

The beaker itself expands when heated. Its linear coefficient of expansion is about 3.3×10^-6/K, so its volume expansion over the temperature range of interest is on the order of 1 part in 3000. This is far smaller than any of the other errors associated with this calculation or with determination of "100% full". We choose to ignore it.

Different stages of life require different nutritional needs. Teenagers grow physically so they need more calories and nutrients. Therefore, option (B) is correct.

Nutritional needs changes will continue throughout all life stages with the requirements for protein, calories, vitamins, and minerals adjusting as we grow older.

The physical needs of the human body change over time, and dietary needs at various life stages will change as a result of psychological, economic, and social aspects. The change in nutritional requirements for each life stage such as infants, children, teens, adults, and the elderly.

Due to the growth period, teenagers need a balanced diet packed full of nutrients including calcium, iron, and protein which will ensure they are getting these essential nutrients. Vegetables are good for older people as they reduce health risks.

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Answer:

Energy Level K

Explanation:

In electronic configuration there are four shells named KLMN which hold 2 , 8 , 18 , 32 electrons respectively.

Since work is defined as the product of force and displacement, the work performed in moving from A to B is 15 J, and the work done in going from B to A is -15 J.

In physics, work is a measure of the energy transferred when a force acts on an object and causes it to move through a distance. Work is defined as the product of the force applied to an object and the distance through which that force acts. Mathematically, work is given by the formula:

W = F x d x cosΘ

where W is work, F is the force applied, d is the displacement of the object, and theta is the angle between the force and the displacement vectors. The unit of work is the joule (J), which is defined as the work done when a force of 1 newton (N) acts on an object to move it through a distance of 1 meter (m).

If the force is applied in the same direction as the displacement, then the angle theta is 0 degrees and cosΘ is equal to 1, so the formula for work simplifies to:

W = F x d

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Spectral shifts are caused by the movement of the spectrum to shorter wavelengths, while the Big Bang Theory is supported by spectra analyses because we can determine how spectra of electromagnetic radiation from stars changes depending on their relative position.

The Big Bang Theory is a widely accepted model in physics about the boring of the Universe, which it is believed occurred though a big explosion, while light spectra refers to the observation of the electromagnetic radiation emitted by stars.

Therefore, with this data, we can see that the Big Bang Theory obtains supportive evidence from the emission of electromagnetic spectra of stars.

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The acceleration of the object is 2.0 m/s². This means that for every second the object is in motion, its velocity will increase by 2.0 meters per second.

The given information is the net force (N) = 5.0 and the mass (kg) = 2.5. We need to determine the acceleration.


Acceleration is the rate at which an object's velocity changes over time.

It is directly proportional to the net force applied to the object and inversely proportional to its mass.

The formula to calculate acceleration is:

Acceleration = Net Force / Mass

Now, let's substitute the given values into the formula:

Acceleration = 5.0 N / 2.5 kg

Simplifying the equation:

Acceleration = 2.0 m/s²

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Answer:

the first on the left goes with the 3rd on the right

second left last right

3rd goes with 1st

4th goes with 5th

5th goes with 4th

and last but not least 6th goes with the second

Explanation:

The entry to record the transaction of a corporation issuing 210 shares of its $5 par value common stock in payment of a $2,900 charge from its accountant for assistance in filing its charter with the state would include the following:

Debit: Organization Costs Expense (or Professional Fees Expense) - $2,900

Credit: Common Stock (Par Value) - $5 x 210 shares - $1,050

Credit: Additional Paid-in Capital (or Paid-in Capital in Excess of Par Value) - $2,900 - $1,050 = $1,850

Explanation:

The debit to Organization Costs Expense (or Professional Fees Expense) records the expense incurred for the accountant's assistance in filing the charter.

The credit to Common Stock accounts for the par value of the shares issued. In this case, it would be $5 multiplied by the 210 shares.

The credit to Additional Paid-in Capital (or Paid-in Capital in Excess of Par Value) accounts for the difference between the total payment made ($2,900) and the par value of the shares issued ($1,050). This represents the amount contributed by shareholders above the par value.

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I believe they should fall at the same pace.

We know that

• The initial speed is zero (it starts from rest).

• The final speed is 55 mi/h.

• The time elapsed is 11 seconds.

To find the distance traveled, let's use the following formula.

But first, we have to transform 55 mi/h into m/s. We know that 1 mile is equivalent to 1609.34 meters, and 1 hour is equivalent to 3600 seconds.

Then, we find the acceleration because we need it to find the distance traveled.

Now we are able to find the distance traveled.

Given that the radius of the curve is 50 m and the centripetal acceleration is 3.92. We are to calculate the speed necessary to keep the car on the curve. The speed necessary to keep the car on the curve is 19.6 m/s. When a car takes a turn at a high speed,

it moves in a circular path. When an object moves in a circular path, there must be some force acting on it to pull it towards the center of the circle. This force is known as the centripetal force (Fc).Centripetal force = Fc = mv²/rWhere m is the mass of the object, v is the velocity of the object and r is the radius of the circle or curve. The centripetal force is directly proportional to the square of the velocity of the object.

So, if the velocity of the object is increased, the centripetal force will also increase. If the velocity of the object is decreased, the centripetal force will also decrease. Since we know the radius of the curve and the centripetal acceleration, we can find the speed of the car. The formula for the centripetal force can be modified as Fc = mac Where a is the centripetal acceleration and m is the mass of the car .So, mac = mv²/r => v² = ma c r => v = sqrt(acr) = 19.6 m/s.Thus, the speed necessary to keep the car on the curve is 19.6 m/s.

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The velocity of the golf ball is 65.2 m/s

The principle of conservation of momentum is that the momentum before collision is equal to the momentum after collision.

Given that;

(0.2kg *  55 m/s) + (0.046kg * 0 m/s) = (0.2kg * 40 m/s) + (0.046kg  * v)

11 = 8 + 0.046v

v = 11 - 8/0.046

v = 65.2 m/s

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The answers are:

Kinetic energy is a form of energy associated with the motion of an object. It is the energy an object possesses due to its velocity or speed. The kinetic energy of an object depends on both its mass and its velocity. The equation to calculate kinetic energy is:

Kinetic Energy = (1/2) * mass * velocity^2

In simpler terms, kinetic energy represents the energy that an object possesses by virtue of its motion.

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Answer:

Explanation:

KE=mv(v)/2

KE=2(1.5)(1,5)/2

KE=2.25

Important Formulas:

\(KE=.5mv^2\)

__________________________________________________________

\(m=2kg\) (measured in kg)

\(v=1.5m/s\) (measured in meter per second)

\(KE=?\) (measured in joules)

__________________________________________________________

\(KE=.5(2)(1.5)^2\)

\(\fbox{KE = 2.25J}\)

Answer:the rock is heaver and gravity pulls it down while the feather floats for a while and then reaches the ground

Explanation:i dont know if this is the right answer or not

Light photons always travel at a constant speed (the speed of light) regardless of their energy, while the velocity of electrons is not constant and can vary with their energy.

Light photons and energetic electrons do not have constant velocities independent of energy. Light photons, which are particles of electromagnetic radiation, travel at a constant speed in a vacuum, which is approximately 299,792 kilometers per second (or about 186,282 miles per second) in a vacuum, denoted as the speed of light (c). This speed is a fundamental constant of nature and remains constant regardless of the energy of the photons. In other words, all photons, regardless of their energy, travel at the same speed in a vacuum.

On the other hand, energetic electrons do not have a constant velocity independent of their energy. According to classical physics, the velocity of an electron can vary depending on its energy. In classical mechanics, the kinetic energy of an object is related to its velocity. However, in the microscopic world of quantum mechanics, the behavior of particles such as electrons is described differently.

In quantum mechanics, the concept of particle velocity becomes less straightforward. Instead of velocity, quantum particles are described by wavefunctions, which represent the probability distribution of finding the particle at a certain location. The wavefunction of an electron evolves over time according to the Schrödinger equation, and it does not directly correspond to a well-defined classical velocity.

However, in certain situations, such as in electron beams or particle accelerators, electrons can be accelerated to high energies. In these cases, the energy of the electrons is related to their speed, but it is not a constant relationship. As the energy of the electrons increases, their speed can also increase, but it is not independent of their energy.

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Answer: particle and neutron

Explanation:

correct me if i’m wrong :)

In a complex waveform, the period is equal to the period of the fundamental waveform.What is a complex waveform?A complex waveform is a sound signal that includes numerous tones with different frequencies and amplitudes.

A waveform is described as the shape and characteristics of a wave as it changes over time. In contrast to simple waveforms, which have only one fundamental frequency, complex waveforms have several harmonics that are integer multiples of the fundamental frequency.

Fundamental frequency: In a complex waveform, the period is equal to the period of the fundamental waveform. The fundamental frequency is the lowest-frequency component of a complex waveform and represents the pitch of the sound. It is equal to the reciprocal of the period of a sound wave. A complex sound, in general, has a pitch that corresponds to the frequency of its fundamental frequency.

When many frequencies with varying amplitudes combine in a complex wave, they produce a wave with a periodic variation that may be measured as a function of time. The period of a complex waveform is similar to that of a sine wave, and it is the duration needed for one complete cycle of a wave's frequency. It is frequently denoted by the symbol T. The period and frequency of a waveform are inversely related. If the frequency of a wave increases, its period decreases, and if its frequency decreases, its period increases.

The equation for the period is T = 1/f, where T is the period and f is the frequency. The fundamental frequency is the most essential component of a complex waveform and is responsible for its pitch. The harmonics and other frequencies in a complex waveform contribute to the quality and timbre of the sound. The fundamental frequency and its harmonics are the primary components of music and sound.

In conclusion, the period of a complex waveform is equivalent to that of the fundamental waveform.

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Answer:

7500 Newtons

Explanation:

Mass of the sportscar= 1500 kg

Acceleration of the sportscar= 5m/s^2

Hence, let the Force acting on it be F

\(We\ know\ that,\\Force=Mass*Acceleration\\F=ma\\\\Here,\\F=1500*5\\=7500 kg m/s^2\ or\ 7500\ Newtons\)

The Arrhenius equation can be used to calculate the rate constant at 32.3°C for a first-order reaction. It relates the rate constant (k) to activation energy (Ea) and temperature (T) in Kelvin. To solve for k2 at 32.3°C, convert temperatures to Kelvin, and solve for A.

To calculate the rate constant at 32.3°C for a first-order reaction, we can use the Arrhenius equation. The Arrhenius equation relates the rate constant (k) to the activation energy (Ea) and the temperature (T) in Kelvin. The equation is as follows:

k = A * e^(-Ea/RT)

Where:
- k is the rate constant
- A is the pre-exponential factor or the frequency factor
- e is the mathematical constant approximately equal to 2.71828
- Ea is the activation energy in joules per mole (J/mol)
- R is the ideal gas constant, which is 8.314 J/(mol*K)
- T is the temperature in Kelvin

To solve for the rate constant at 32.3°C, we need to convert the temperatures to Kelvin. The conversion formula is T(K) = T(°C) + 273.15. Therefore, 25°C is equal to 298.15 K, and 32.3°C is equal to 305.45 K.

Now, let's substitute the values into the Arrhenius equation:

k1 = 0.543 (given rate constant at 25°C)
Ea = 75.9 kJ/mol (given activation energy)
T1 = 298.15 K (temperature at 25°C)
T2 = 305.45 K (temperature at 32.3°C)

We'll convert the activation energy from kJ/mol to J/mol by multiplying it by 1000:
Ea = 75.9 kJ/mol * 1000 = 75900 J/mol

Now, let's solve for the rate constant at 32.3°C:

k2 = A * e^(-Ea/RT2)

To find A, we can rearrange the equation and solve for it:

A = k1 / e^(-Ea/RT1)

Substituting the known values:

A = 0.543 / e^(-75900 J/mol / (8.314 J/(mol*K) * 298.15 K))

Now, plug in the values into the equation for k2:

k2 = A * e^(-Ea/RT2)

After performing the calculations, you will find the rate constant (k2) at 32.3°C.

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Answer:

its when a liquid, prolly water, turns into a vapor !!

Explanation:

and nice pic uwu

A liquid turning into a gas is evaporation. It is how water gets from the surface of the Earth to the atmosphere.

Latent heat is a form of energy held in the evaporated water when it evaporates and cools.

Evaporation plays a significant role in the energy exchange that results in atmospheric motion, affecting weather and climate in the Earth-atmosphere system.

The particles with the highest kinetic energy are the first to evaporate from a liquid.

Most of the air's moisture evaporates from rivers, lakes, seas, and oceans. Water at the surface of the Earth evaporates into water vapor, which rises into the sky and forms clouds, which eventually release water back onto Earth as precipitation.

Answer:

Tension is the force that pulls things apart while compression is what squeezes things together.

(a) The position of the object is 35.0 cm from the convex lens.

(b)  The focal length of the lens is -122.5 cm.

(a) To find the position of the object, we can use the magnification equation:

Magnification = Height of the image / Height of the object

where:

m = Magnification

h_i = Height of the image

h_o = Height of the object

Given:

Height of the image (h_i) = 35.0 cm

Height of the object (h_o) = 25.0 cm

Plugging in these values, we have:

m = 35.0 cm / 25.0 cm = 1.4

The magnification is also equal to the ratio of the image distance to the object distance:

m = -d_i / d_o

we use the equation:

m = d_i / d_o

Plugging in the given values, we have:

1.4 = 49.0 cm / d_o

Solving for d_o:

d_o = 49.0 cm / 1.4

d_o ≈ 35.0 cm

Therefore, the position of the object is approximately 35.0 cm from the convex lens.

(b) To find the focal length of the lens, we can use the lens formula:

1/f = 1/d_i - 1/d_o

Given:

d_i = 49.0 cm

d_o = 35.0 cm

Plugging in these values, we have:

1/f = 1/49.0 cm - 1/35.0 cm

Simplifying the equation, we get:

1/f ≈ (35 - 49) / (49 * 35) \(cm^{-1\)

Calculating the right side of the equation, we have:

1/f ≈ -14 / (1715) \(cm^{-1\)

The reciprocal of both sides:

f ≈ - (1715) cm / 14 \(cm^{-1\)

Therefore, the focal length of the lens is approximately -122.5 cm (or 122.5 cm with a negative sign indicating a convex lens).

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The distance between first airplane and second airplane after 1.8 hours of their departure is 1598.22 meters.

The cosine formula for vector addition is -

|R|² = |A|² + |B|² + 2AB cosφ

Where - φ is the angle between vectors A and B.

Given is two airplanes that leave the airport at same time. The velocity of the first airplane is 690 m/h at a heading of 68.5°. The velocity of the second airplane is 590 m/h at a heading of 156°.

The length of the position vector of first airplane →

|OA| = velocity x time = 690 x 1.8 = 1242 miles.

The length of the position vector of second airplane →

|OB| = velocity x time = 590 x 1.8 = 1062 miles

Angle between vectors OA and OB →

φ = 156° - 68.5° = 87.5°

In the triangle ΔOAB, using the triangle law of vector addition, we get →

OA + AB = OB

AB = OB - OA

AB = OB + (- OA)

Now, using the formula for resultant of addition of two vectors →

AB² = (OB)² + (- OA)² + 2(OA)(- OB) cosφ

AB² = OB² + OA² + - 2(OA)(OB)cosφ

AB² = 11,27,844 + 15,42,564 - 2 x 1242 x 1062 x cos(87.5°)

AB² = 11,27,844 + 15,42,564 - 2 x 1242 x 1062 x 0.044

AB² = 26,70,408 - 1,16,072.352 = 25,54,335.648

AB = √25,54,335.648

AB = 1598.22 meters

Hence, the distance between first airplane and second airplane after 1.8 hours of their departure is 1598.22 meters.

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The fuel component of a rocket typically represents the greatest percentage of mass.

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Answer:

1000 seconds

Explanation:

1km is equivalent to 1000meters

15km to 15000meters

Time=Distance/Speed

15000meter/15 meter per second =1000 seconds

C. doing bicep curls.

Explanation:

why? A. is considered thermal energy.

B. is considered solar energy to chemical energy.

When hit with the same amount of positive force, a baseball travels farther than a softball.

This is because baseball is denser and harder than softball, which means it can travel faster and farther through the air.

However, it's worth noting that there are many factors that can affect the distance a baseball or softball travels, including the angle and speed of the hit, the type of bat used, the temperature and humidity of the air, and the wind conditions.

So, while it's generally true that a baseball will travel farther than a softball when hit with the same amount of force, there are many variables to consider and the exact distance traveled can vary widely.

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