What happens to the sound an object makes when the speed of vibrtions decreases (slowdown?)

The answer is that gravity does 29.4 Joules (J) of work on the book as it is lifted from the table to the bookshelf.

When the book is lifted from the table to the shelf, gravity does some work on the book. The book was at a certain height when it was lifted, and its final position was 2.25 meters above the ground.

Work is the force multiplied by the distance through which it acts, so work is done on the book by gravity. The book has no acceleration, so the net force acting on it is zero. The force of gravity is counteracted by the force of the lift.

The work done by gravity on the book is zero because gravity has no movement in the direction of force when the book is being lifted. When you pick the book up and place it on the bookshelf, gravity doesn't do any work because the book doesn't move up or down.  The energy used to lift the book is the same as the work done against gravity, which is given by the formula:

Potential energy (PE) = mghWhere m is the mass of the book, g is the acceleration due to gravity, and h is the height the book is lifted to.

Therefore, Potential energy (PE) = mgh = 2.0 × 9.8 × (2.25 − 0.75) = 29.4 J. Hence, the work done by gravity on the book is 29.4 J.

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Answer:

Explanation:

Given:

P = 12 W

R = 270 Ω

t = 2.5 s

____________

Q - ?

Power:

P = I²·R

Current strength:

I = √ (P / R) = √ (12 / 270) ≈ 0.21 A

Charge:

Q = I·t = 0.21·2.5 = 0,525 C

Answer:

Temperature on Jupiter and Saturn are too high for methane to condense.

Explanation:

However, methane can condense on Uranus and Neptune because they are farther from the sun and hence colder.

I don't know please mark as brilliant

The final equilibrium temperature (in °C) of the system when ice and water vapor are combined can be calculated using the principle of energy conservation and the specific heat capacities of ice and water.

To determine the final temperature, we can apply the equation:

(m₁ * c₁ * ΔT₁) + (m₂ * c₂ * ΔT₂) = 0

Where:

- m₁ is the mass of ice (22.0 kg)

- c₁ is the specific heat capacity of ice (2.09 J/g·°C)

- ΔT₁ is the change in temperature of ice (final temperature - 0.00 °C)

- m₂ is the mass of water vapor (4.80 kg)

- c₂ is the specific heat capacity of water (4.18 J/g·°C)

- ΔT₂ is the change in temperature of water (final temperature - 100.0 °C)

Solving for the final temperature, we find:

(22.0 kg * 2.09 J/g·°C * ΔT₁) + (4.80 kg * 4.18 J/g·°C * ΔT₂) = 0

Substituting the given values, we can solve for ΔT₁ and ΔT₂. Once we have those values, we can find the final temperature by adding ΔT₁ to 0.00 °C.

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Answer:

Velocity is “how much distance you cover in a particular time.” Space and time are fundamental quantities, and meters and seconds are their base units. Velocity is a combination of a space and a time, and therefore its units — “m/s” – are “derived” from the units for space and time

Answer:

Short sight occurs when the eyeball is too long or the lens is too thick, or both. As a result, light rays from distant objects are focused in front of the retina (because the light rays are highly converged). The image formed on the retina is therefore out of focus.

Short sight can be corrected by wearing glasses with concave lenses. Light rays from distant objects are diverged by concave lenses before entering the eyes, so that light can be focused on the retina to form a sharp image.

All of the listed vocal behaviors, including tone of voice, rate of speech, and loudness, are dimensions of nonverbal communication. So, the correct answer is (d) all of these.

These vocal behaviors, along with other nonverbal cues, play a significant role in communication, as they can provide additional meaning, context, and emotional expression to verbal messages.

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Answer:

it depends on the medium :D

To lock the speed between 150m/s and 160m/s for 10 seconds before the 5000m height you must accelerate at 3.26 m / s² for 3450 m and then accelerate at 1 m / s² for 1550 m.

If the speed is between 150 m / s to 160 m / s for 10 seconds,

u = 150 m / s

v = 160 m / s

t = 10 s

a = ( v - u ) / t

a = 160 - 180 / 10

a = 10 / 10

a = 1 m / s²

s = ut + 1 / 2 at²

s = ( 150 * 10 ) + ( 1 / 2 * 1 * 10² )

s = 1550 m

Remaining distance = 5000 - 1550

Remaining distance = 3450 m

u = 0

v = 150 m / s

v² = u² + 2 a s

150² = 0 + ( 2 * a * 3450 )

a = 22500 / 6900

a = 3.26 m / s²

Therefore, to lock the speed between 150m/s and 160m/s for 10 seconds before the 5000m height you must accelerate at 3.26 m / s² for 3450 m and then accelerate at 1 m / s² for 1550 m.

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Answer:

k=0.84

Explanation:

Relative density of liquid is given by:

k=(56.2−24.5)(51.2−24.5)

k=31.726.7

k=0.84

The force diagram on the desk consists of normal reaction and weight of the pencil.

The net force on the desk in vertical direction is 1 N.

The net force on the desk in horizontal direction is 0.

The given parameters;

The force diagram of the desk is sketched as follows;

                                             ↑ N

                                             ⊕

                                              ↓ W

Where;

The net force on the desk in vertical direction = 1 N

The net force on the desk in horizontal direction = 0

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Answer:

20mlvs I'd pick for this

The equivalent resistance decreases as more resistors are added to a parallel circuit due to the way current divides among the branches.

In a parallel circuit, each resistor has its own separate path for current to flow. When more resistors are added in parallel, the total available paths for current to travel through increase. As a result, the overall resistance to the flow of current decreases. The decrease in equivalent resistance can be understood by considering Ohm's Law, which states that resistance is inversely proportional to current. In a parallel circuit, as the number of paths for current increases, the total current flowing through the circuit also increases. Since the voltage across each resistor remains the same in a parallel circuit, the increase in total current leads to a decrease in the overall resistance.

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The wave of the 1800s, also known as the Second Great Awakening, was different from the First Great Awakening in several ways. Firstly, the Second Great Awakening was more widespread and lasted longer than the First Great Awakening, which occurred mainly in the mid-1700s and was centered in the New England colonies.

Secondly, the Second Great Awakening was characterized by a greater emphasis on individualism and personal religious experience, with preachers encouraging individuals to seek salvation through personal conversion and the establishment of a personal relationship with God. Thirdly, the Second Great Awakening was marked by a significant increase in the number of new religious denominations, including the Mormons, Seventh-Day Adventists, and the Disciples of Christ. Fourthly, the Second Great Awakening had a greater impact on American society as a whole, contributing to the rise of the abolitionist and women's suffrage movements. In summary, the Second Great Awakening was more widespread, emphasized individualism and personal religious experience, saw the emergence of new religious denominations, and had a greater impact on American society than the First Great Awakening.

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Answer:

4. atmosphere and geosphere

5. atmosphere and hydrosphere

6. hydrosphere and geosphere (? not sure about this one sorry)

7. hydrosphere and geosphere

8. biosphere and geosphere

Explanation:

The potential energy of an object has the following formula

         Potential energy = mgh

      where m = mass of the object

                   g = acceleration due to gravity

                   h = height of the object

This means that the potential energy of an object depends upon its mass, acceleration due to gravity, and height.

In the given situation we have a bucket full of water. If the mass and acceleration due to gravity are not changed, the only way the potential energy can be decreased is by reducing the height of the bucket full of water.

This can be done by: -

         (i) Lifting the bucket full of water in such a way that you

             decrease its height as compared to the bench.

        (ii) Put the bucket full of water on a stool whose height is

            lower than the bench.

Answer:

1.By decreasing it's contents- this decreases the weight of the bucket thus decreasing the potential energy of the bucket.

2.By decreasing the height of the bench we have decreased the amount of potential energy stored in the bucket

Answer:

The biological material used to determine a DNA profile include blood, semen, saliva, urine, feces, hair, teeth, bone, tissue and cells.

Explanation:

Answer:

bone

Explanation:

The formula I = P/E holds true for calculating the current in a circuit, and can be verified by substituting the values of power and voltage into the equation.

This statement confirms that the correct formula for calculating the current in a circuit is I = P/E, which is derived from the rule that power is equal to voltage multiplied by current. The validity of the formula can be checked by substituting the values of power and voltage into the equation, which should yield the correct value of current.

It is important to understand and use the correct formula for calculating current in a circuit, as it is a fundamental concept in electrical engineering and plays a crucial role in designing and analyzing electrical systems.

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three plus four NERD

Answer:

The momentum of the van before the collision can be calculated as:

momentum = mass x velocity

momentum = 1200 kg x 8 m/s

momentum = 9600 kg⋅m/s

Therefore, the momentum of the van before the collision was 9600 kg⋅m/s.

After the collision, the van came to a stop, which means its final velocity was 0 m/s. The momentum of the van after the collision is:

momentum = mass x velocity

momentum = 1200 kg x 0 m/s

momentum = 0 kg⋅m/s

Therefore, the momentum of the van after the collision was 0 kg⋅m/s.

The change in momentum of the van can be calculated as:

change in momentum = final momentum - initial momentum

change in momentum = 0 kg⋅m/s - 9600 kg⋅m/s

change in momentum = -9600 kg⋅m/s

Therefore, the change in momentum of the van was -9600 kg⋅m/s.

The force that acted on each driver can be calculated using the formula:

force = change in momentum/time

force = (-9600 kg⋅m/s) / (0.3 s)

force = -32000 N

The negative sign indicates that the force acted in the opposite direction to the motion of the van.

Therefore, the force that acted on each driver was 32000 N.

Explanation:

Answer:

I would say all of the above

Explanation:

I think this bcuz it says it should be useful and comfortable and so four is correct bcuz they need to know if it feels good and also if it possibly would give a rash or worse. Next, all the other ones would prove how well the suits work in the conditions need for use.

Hope this helps.

There are 0.146 moles of gas in the system which has 1.85 liters of gas at 35°C under7.43 × 10^7 pascals of pressure.

Given:Volume of the gas = 1.85 L

Temperature of the gas = 35 °C = 308 K

Pressure of the gas = 7.43 × 10^7 Pa

We can use the Ideal Gas Law to find the number of moles of gas present in the system. The Ideal Gas Law is given by:P V = n R T

Where,P = pressure of the gas

V = volume of the gas

n = number of moles of gas present

R = gas constant

T = temperature of the gas

R = 8.314 J/mol K

We need to convert the temperature from Celsius to Kelvin by adding 273.K = 308 K

Kn = (PV)/(RT)n = (7.43×10⁷Pa)×(1.85L)/8.314J/molK×308K)n =0.146moles

Hence, there are 0.146 moles of gas in the system.

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When the nichrome wire carries a current of 0.50 A, the voltage across its ends is approximately 0.635 V.

To calculate the resistance (R) of the nichrome wire:

Step-by-Step Solution:

1. Convert the radius from millimeters to meters:

  r = 0.50 mm = 0.0005 m

2. Calculate the cross-sectional area (A) of the wire using the formula:

  A = π * r^2

  A = 3.1416 * (0.0005 m)^2

3. Substitute the given values to calculate the cross-sectional area (A):

  A = 3.1416 * (0.0005 m)^2

  A ≈ 7.854 × 10^-7 m^2

4. Calculate the resistance (R) using the formula:

  R = (ρ * L) / A

  R = (1.0 × 10^-6 Ω ∙ m * 1.0 m) / (7.854 × 10^-7 m^2)

  R ≈ 1.27 Ω

5. Substitute the calculated resistance (R) into Ohm's law to find the voltage (V):

  V = I * R

  V = 0.50 A * 1.27 Ω

  V ≈ 0.635 V

Therefore, when the nichrome wire carries a current of 0.50 A, the voltage across its ends is approximately 0.635 V.

Substitute the calculated resistance (R) into the equation to find the voltage (V).

By following these steps, you can determine the voltage across the ends of the nichrome wire when it carries a current of 0.50 A.

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Answer:

Precision: closeness of your measurements to each other

Accuracy: closeness of your measurements to a specific value

Hope this helps

Explanation:

The angle of diffraction of the blue light that passed through a slit of a diffraction grating is 63.5⁰.

The angle of diffraction of the blue light that passed through a slit of a diffraction grating is calculated as follows;

mλ = dsinθ

sin θ = mλ/d

sin θ = (1 x 425)/475

sin θ = 0.8947

θ = sin⁻¹(0.8947)

θ = 63.5⁰

Thus, the angle of diffraction of the blue light that passed through a slit of a diffraction grating is 63.5⁰.

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Answer:

12 is the angle of diffraction

Explanation:

edge

The statement "In 1609, Galileo discovered that the Milky Way was made up of millions of stars" is the correct statement about astronomical discoveries made using the telescope.

Telescopes have helped astronomers make many significant discoveries over the years. One of the most important telescopic discoveries was made by Galileo in 1609, when he discovered that the Milky Way was made up of millions of stars. A telescope is an instrument used to observe distant objects, magnifying them by using lenses or curved mirrors to focus light rays.

It is used to study celestial objects such as planets, stars, galaxies, and nebulae. Astronomy is a branch of science that studies these objects, and astronomers use telescopes to make discoveries and observations.Galileo Galilei is regarded as one of the most influential astronomers in history. Galileo made many significant discoveries using telescopes, including the discovery of the four largest moons of Jupiter and the phases of Venus.

The discovery of the Milky Way, as mentioned earlier, was another significant discovery made by Galileo.Galileo was a pioneer in the development of modern physics and astronomy. His observations with telescopes revolutionized our understanding of the universe and paved the way for many discoveries that followed.

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