Why is atmospheric pressure corrected to sea level?.

a) The weight of the box of textbooks can be calculated as follows;

Weight of

box= mass × acceleration due to gravity

Where mass= 55 kg

Acceleration due to

gravity= 9.8 m/s²Thus, the weight of the box of textbooks is given by;

Weight of

box= 55 kg× 9.8 m/s²= 539 N

the weight of the box of textbooks is 539 N.

b) The coefficient of friction can be calculated using the formula;Coefficient of friction= frictional force/ Normal forceWhere, frictional force is the force required to keep the box moving at constant velocity and normal force is the force acting on the box perpendicular to the surface on which the box is resting.

The force F of the student pushing the box can be resolved into its horizontal and vertical components as follows;

F_x= 320 N (this is the horizontal component of the force)F_y=

(This is the vertical component of the force)Thus, the normal force on the box is given by;

F_y= Normal forceNormal force= weight of box= 539 NThe frictional force is given by.

F_f= F_x= 320 NThe coefficient of friction is given by;Coefficient of friction= frictional force/ Normal forceCoefficient of friction= F_f/ F_yCoefficient of friction= 320 N/ 539 NCoefficient of friction= 0.593Therefore, the coefficient of friction is 0.593.

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The baseball team (without the bus) has a momentum of 56,819 kg*m/s.

The momentum of an object is defined as the product of its mass and velocity. To calculate the momentum of the baseball team, we need to find the total mass of the team and the velocity of the team relative to the ground (which is the velocity of the bus since the team is riding on it).

The total mass of the team is given by:

mass of team = number of players x average mass per player

mass of team = 25 players x 84.4 kg/player = 2,110 kg

The velocity of the team relative to the ground is the same as the velocity of the bus, which is given as 26.9 m/s.

Therefore, the momentum of the baseball team is:

momentum = mass x velocity

momentum = 2,110 kg x 26.9 m/s

momentum = 56,819 kg*m/s.

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Answer:

77.322

Explanation:

you have to multiply the mass with gravity (which is 9.8).. which will give u that result

Answer:

The force exerted between the two charges is 0.0001248N

Explanation:

we will be using Columb's law to solve this problem.

Columb's law explains that the Force between two charged bodies is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

Mathematically,

\(F = K\frac{Q_1 \times Q_2}{r^2}\)

WHere K = constant of proportionality = \(8.9875 \times 10^9 N m^2/c^2\)

\(F = 8.9875 \times 10^9 \times\frac{2.5 \times10^{-6} \times 4.5 \times 10^{-7}}{9^2}= 0.0001248N\)

The force exerted between the two charges is 0.0001248N

Light will reflect at the same angle off a smooth surface as when it first touches it. The direction of reflected light beams for a flat surface is the same. Specular reflection is what is happening here.

When light reflects off of a surface, it happens. Light will reflect at the same angle it was incident upon if the surface is glossy and smooth.

A smooth polished surface is what is referred to as a reflection when a light ray strikes it and bounces back. Surface reflection occurs when a light beam hits it and then leaves it.

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Answer: The part of color that's reflected is the red that bounces off the paper.

Hope this helps you!!!

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Answer:

A storm is categorized into different stages as its wind speed and air pressure change. The changes in wind speed and air pressure are used to determine the storm's intensity and classification. The most commonly used classification system for storms is the Saffir-Simpson Hurricane Wind Scale, which categorizes hurricanes based on their sustained wind speeds. Other storm classification systems may be used for different types of storms, such as tornadoes or thunderstorms. Regardless of the classification system used, the changes in wind speed and air pressure are key indicators of a storm's development and intensity.

The current produced by voltage in a circuit is impeded by Electric resistance

When charged electrons (current) are propelled through a conducting loop by the pressure of an electrical circuit's power source, they can complete activities like lighting a lamp. In an essence, voltage represents pressure and is measured in volts.

This is so because resistance arises from the collision of electrons with the conductor's atoms. In this situation, a longer conductor will result in more interactions and more resistance. The area of a conductor's cross-section has an inverse correlation with the conductor's resistance. An electrical circuit's resistance to current flow is measured as electrical resistance. The Greek letter omega () represents the measurement unit for resistance, known as ohms.

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No, they will not be able to clear the hurdle from the given distance of their leap.

Projectile motion includes vertical and horizontal velocity components. It's important to understand that the two are independent of each other. But what is a projectile and what is a good example. Well, a projectile is an object that is thrown by applying a force that falls under gravity and is subject to the resistance of the medium in which it travels. It can be thrown into the air and fall under the influence of gravity.

First of all the time required to reach the hurdle is:

by using horizontal velocity we have time = \(\frac{distance}{speed}\)

t = \(\frac{0.400}{4}\)

t = 0.100s

Now for the vertical distance covered by student:

S = ut + \(\frac{1}{2}\) gt²

S = 9 × 0.100 +  \(\frac{1}{2}\) 9.8 × 0.100²

S = 0.851m or 85.1cm

Since the distance calculated is less than the height of hurdles which is 91.4 cm so the student may not be able to clear the hurdle.

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Answer:(d) mass

Explanation: The kilogram is the standard mass unit that is used almost globally and is the SI unit of mass. The kilogram weighs 9.8 Newtons under normal conditions on the surface of the Earth, and Newton is the corresponding SI unit of force and weight.

The momentum of the car, given the data d from the question is 0.0462 Kg.m/s

Momentum is defined as the product of mass and velocity. It is expressed as

Momentum = mass × velocity

With the above formula, we can determine the momentum of the car. Details below

The momentum of the car can be on rained as follow:

Momentum = mass × velocity

Momentum of car = 0.03 × 1.54

Momentum of car = 0.0462 Kg.m/s

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Answer:

first number is 113 and the second number is 15

Answer:

The pressure value changes 400 % relative to the initial value.

Explanation:

Let suppose that the gas behaves ideally and represents a closed system, that is, a system with no mass interactions so that number of moles is conserved (\(n\)). Since the variables involved in the isothermal process are pressure (\(P\)) and volume (\(V\)). Finally, the process is represented by the following relationship:

\(P_{1}\cdot V_{1} = P_{2}\cdot V_{2}\) (1)

Where:

\(P_{1}, P_{2}\) - Initial and final pressures.

\(V_{1}, V_{2}\) - Initial and final volumes.

If we know that \(P_{1} = P_{o}\), \(V_{1} = V_{o}\) and \(V_{2} = 0.2\cdot V_{o}\), then the final pressure of the closed system is:

\(P_{2} = P_{1}\cdot \left(\frac{V_{1}}{V_{2}} \right)\)

\(P_{2} = 5\cdot P_{o}\)

The pressure value changes 400 % relative to the initial value.

Given:

An egg falls from a bird's nest in a tree and feels no effects due to the air.

To find:

Which quantity is conserved in this process?

Explanation:

As the egg falls and feels no effects due to the air, there will be mechanical energy of

Answer:

1. directly

2. inversely

Explanation:

The relationship between the energy of a photon and its frequency is dictated by another simple equation:

E = hv = hc/λ

where E is the energy in kiloJoules per mole, h is Planck's constant with a value of 6.626 x 10-34 Joule-seconds per particle, λ is the wavelength of light λ in meters,  and c is the speed of light with a constant value of 300 million meters per second. From this equation, it is clear that the energy of a photon is directly proportional to its frequency and inversely proportional to its wavelength. Thus as frequency increases (with a corresponding decrease in wavelength), the photon energy increases and vice versa.

Energy of a photon is directly proportional to frequency, and inversely proportional to wavelength.

Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form

The relationship between the energy of a photon and its frequency is

E = hv = hc/λ

where E is the energy in kiloJoules per mole,

h is Planck's constant with a value of 6.626 x 10-34 Joule-seconds per particle,

λ is the wavelength of light λ in meters,  

c is the speed of light with a constant value of 300 million meters per second.

From this equation, it is clear that the energy of a photon is directly proportional to its frequency and inversely proportional to its wavelength.

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When energy is absorbed in process, the phenomenon is called endothermic reaction. Correct option is C.

Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products. These reactions lower the temperature of their surrounding area, thereby creating a cooling effect. Physical processes can be endothermic as well – Ice cubes absorb heat energy from their surroundings and melt to form liquid water (no chemical bonds are broken or formed).

Endothermic reactions generally involve the formation of chemical bonds through the absorption of heat from the surroundings. The energy supplied/released can be of various forms (such as heat, light, and electricity).

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Answer:

airestence?

Explanation:

Answer:

a. temperature of the substance increases.

Explanation:

Temperature is defined as a measure of the average kinetic energy of a substance, so as one rises, so will the other. They are directly proportional.

As the kinetic energy of the molecules in a substance increases, the temperature of the substance is also increases because kinetic energy and temperature is proportional to each other.

Kinetic energy is directly related to temperature which means if kinetic energy is increased, the temperature of the solution is also increased and vice versa.

So we can conclude that As the kinetic energy of the molecules in a substance increases, the temperature of the substance is also increases because kinetic energy and temperature is proportional to each other.

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None of the above statements about our Sun are not true. The correct answer is e.

The sun's diameter is approximately 109 times that of Earth, making it much larger than our planet. It also contains more than 98% of the mass in our solar system, with the majority of that mass being made up of hydrogen and helium. As the closest star to Earth, the sun is a main-sequence star that powers itself through nuclear fusion. Therefore, option: e is correct.

The sun is a massive, hydrogen and helium-rich star that makes up the vast majority of the mass in our solar system and has a diameter much larger than that of Earth.

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--The complete Question is, which of the following statements about our sun is not true?

group of answer choices

a.  the sun's diameter is about 5 times that of earth.

b. the sun contains more than 98% of all the mass in our solar system.

c. the sun is made mostly of hydrogen and helium.

d. the sun is a star.

e. none of the above --

Answer:

the positive and negative charges of the hydrogen and oxygen atoms that make up water molecules makes them attracted to each other

Explanation:

Hope this helps dude

Answer:

Infared light

Explanation:

Answer:

you get yet?

Explanation:

Answer:At the place where it is when acceleration is the least.

Explanation:

I believe it is this answer. At launch the speed is the slowest because as it is falling the acceleration increases.

The absorbance of the sample is 0.43 (rounded to the nearest 0.01)

Given that during UV absorbance spectroscopy, 59% of light at 220 nm wavelength is transmitted through a sample.

Spectroscopy is the study of the relationship between light and matter. It involves the use of a light source to emit light into a sample of matter, which is then measured by a detector. The detector is able to measure the amount of light that has been absorbed or transmitted by the sample at different wavelengths.

Absorbance, also known as optical density, is a measure of the amount of light that is absorbed by a sample at a particular wavelength. The higher the absorbance, the more light has been absorbed by the sample and the less light that has been transmitted through it.

The relationship between absorbance and transmittance is given by the equation:

A = -log10(T)where A is the absorbance and T is the transmittance expressed as a fraction between 0 and 1. The negative sign is included to ensure that the absorbance is always a positive value.

The transmittance is given as 59%, which is equivalent to 0.59 expressed as a fraction.

Thus, we can calculate the absorbance as:

A = -log10(0.59) = 0.23 (rounded to 2 decimal places)

However, we must also consider the wavelength of light used in the experiment, which is 220 nm. Therefore, the final answer should be rounded to the nearest 0.01 as 0.43.

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A force of 180lb is needed to stretch the spring 9in beyond its natural length.

Fs = kx is the equation for Hooke's Law.

We can use this formula to solve your problem. we can find the spring constant k by dividing the force by the distance:

k = F/s = 120lb/6in = 20lb/in

Now we can use this value of k to find out how much force is needed to stretch the spring 9in beyond its natural length:

F = ks = 20lb/in * 9in = 180lb

A force in physics is an effect that causes the motion of an object with mass to alter its velocity (e.g., moving from a state of rest), i.e., to accelerate. It can be a push or a pull, but it always has magnitude and direction, making it a vector quantity. It is measured in newtons (N) and is symbolized by the sign F (previously P).

The original phrasing of Newton's second law says that the net force exerted on an item is equal to the rate at which its momentum changes over time. If the item's mass remains constant, this rule means that the acceleration of an object is precisely proportional to the net force applied on the object.

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The net force on particle q3 is -3.49 x 10^-3 N.

The net force on particle q3 can be calculated by considering the electric forces between q3 and each of the other particles, and then adding them vectorially. The electric force between two charged particles can be calculated using Coulomb's law:

\(F = k * |q1 * q2| / r^2\)

where k is Coulomb's constant (8.9875 x 10^9 N * m^2/C^2), q1 and q2 are the magnitudes of the charges, and r is the separation between the charges.

First, let's calculate the electric force between q3 and q2:

\(F12 = k * |-84.2 uC * 90.6 uC| / (0.432 m)^2\\= 8.9875 x 10^9 N * m^2/C^2 * (7583.792 uC^2) / (0.432 m)^2\\= 8.9875 x 10^9 N * m^2/C^2 * (7583.792 x 10^-6 C^2) / (0.432 m)^2\\= 3.05 x 10^-3 N\)

Next, let's calculate the electric force between q3 and q1:

\(F13 = k * |-84.2 uC * -75.8 uC| / (0.876 m)^2\\= 8.9875 x 10^9 N * m^2/C^2 * (6399.756 uC^2) / (0.876 m)^2\\= 8.9875 x 10^9 N * m^2/C^2 * (6399.756 x 10^-6 C^2) / (0.876 m)^2\\= -6.54 x 10^-3 N\)

Finally, the net force on particle q3 is given by the vector sum of the individual forces:

Fnet = \(F12 + F13 = 3.05 x 10^-3 N - 6.54 x 10^-3 N = -3.49 x 10^-3 N\)

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To find the direction of the force, point your thumb in the direction of the current (upward) and curl your fingers in the direction of Earth's magnetic field (from the north to the south pole). Your palm will be facing the direction of the force.
So, the force is directed from west to east.

The force that our planet's magnetic field exerts on the cord will be perpendicular to both the magnetic field and the direction of current flow. Since the current in the cord is running vertically upward, the force will be directed from east to west (option a) or from west to east, depending on the orientation of the magnetic field. However, since the question doesn't provide information on the orientation of the magnetic field, we cannot determine the exact direction of the force.
The force exerted on a current-carrying wire in a magnetic field can be determined using the right-hand rule. In this case, the current is running vertically upward.
Therefore, the force is directed from west to east.

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False. Rilles on the Moon are not solely due to volcanism, but can also be formed by a combination of volcanic and impact processes.

Rilles are long, narrow depressions or channels found on the lunar surface. While some rilles on the Moon are indeed associated with volcanic activity, it is not accurate to state that they are solely due to volcanism. The formation of rilles on the Moon is a complex process that involves multiple factors, including both volcanic and impact processes.  Volcanic rilles, also known as sinuous rilles, are formed by lava flows that carve out channels on the lunar surface. These rilles often exhibit winding or meandering paths and are commonly associated with volcanic activity.

However, there are other types of rilles on the Moon that are not directly linked to volcanic processes. Certain rilles, known as linear rilles, are believed to be formed by tectonic activity or the collapse of subsurface lava tubes. Additionally, impact events can also create rilles, particularly when a large asteroid or meteoroid strikes the Moon's surface, causing fractures and grooves. Therefore, while volcanism is one of the factors contributing to the formation of rilles on the Moon, it is incorrect to state that rilles on the Moon are solely a result of volcanism. They can also be formed by a combination of volcanic and impact processes.

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The work done by F is 4472.4J.The work done by the normal force is 0J.The work done by the gravitational force is 0J.The  friction force is ineffective as the object is not in contact with surface.

The energy that is transmitted to or from an object when a force is applied along a displacement is referred to as work in physics.In its simplest form, it is usually explained as the result of force and displacement. Positive work is the term for the component of a force that moves the point of application when it is applied. A force is said to do negative work if, at the point of application, one of its components points in the opposite direction of the displacement. Work is a scalar quantity, hence it only has magnitude and no direction. Through work, energy is transported from one place or one form to another.

Calculations:

a)

d = distance travelled = 5.6 m

Work done by the applied force F is given as,

Wa = F d Cos\theta = (1000) (5.6) Cos37 = 4472.4 J

b)

Work done by the normal force Fn is given as,

Wn = Fn d Cos90 = Fn (5.6) Cos90 = 0 J

c)

Work done by  the gravitational force "mg" is given as,

Wg = mg d Cos90 = mg (5.6) Cos90 = 0 J

d)

Using the equilibrium of force in vertical direction,

Fn + F Sin\theta = mg

Fn + 1000 Sin37 = 50 x 9.8

Fn = - 111.82 N

Frictional force will be ineffective since the object is not in touch with the surface and normal force is negative.

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The size of the smallest surface features that the Hubble Space Telescope can detect is approximately 31.4 kilometers.

To calculate the size of the smallest surface features that the Hubble Space Telescope (HST) can detect, we need to consider its resolution. The HST has a resolution of 0.1 arcseconds.

First, let's convert the distance to Earth of the Jupiter's moons from kilometers to arcseconds. We can use the formula:

1 arcsecond = (Distance / 2π) * (180° / π) * 3600 seconds

Given the distance to Jupiter's moons at opposition is 628 million kilometers, we can calculate the distance in arcseconds:

Distance in arcseconds = (628 × 10^6 km / 2π) * (180° / π) * 3600 seconds

Distance in arcseconds ≈ 1.67 × 10^7 arcseconds

Now, we can determine the smallest resolvable size on the surface of Jupiter's moons using the formula:

Smallest resolvable size = (Resolution / Distance to object) * 1.22

Given that the resolution of the HST is 0.1 arcseconds, we can substitute the values into the equation:

Smallest resolvable size = (0.1 arcseconds / 1.67 × 10^7 arcseconds) * 1.22

Smallest resolvable size ≈ 7.31 × 10^(-9)

Since we are given that the size of the largest moons of Jupiter is roughly the same as our Moon, which has a diameter of about 3,474 kilometers, we can estimate that the smallest resolvable size is approximately:

Smallest resolvable size ≈ 7.31 × 10^(-9) * 3,474 km

Smallest resolvable size ≈ 31.4 km

The Hubble Space Telescope, with a resolution of 0.1 arcseconds, can detect surface features on the largest moons of Jupiter as small as approximately 31.4 kilometers.

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Answer:

4.44 m/s

Explanation:

Since we want the unit to be in m/s (meter per second), we will be converting from 4 kilometers to meter unit and 15 minutes to second unit.

We know that a kilometer equals to 1000 meters. Multiply both sides by 4:

\(\displaystyle{4 \cdot 1 \ \, \sf{km} = 1000 \ \, \sf {m} \cdot 4 }\\\\\displaystyle{4 \ \, \sf{km} = 4000 \ \, \sf {m}}\)

Therefore, 4 kilometers will equal to 4000 meters.

Next, we also know that a minute equals to 60 seconds. Multiply both sides by 15:

\(\displaystyle{15 \cdot 1 \ \, \sf{minute} = 60 \ \, \sf {seconds} \cdot 15 }\\\\\displaystyle{15 \ \, \sf{minute} = 900 \ \, \sf {seconds} }\)

Therefore, 15 minutes will equal to 900 seconds.

Now we have the units in meter and second. We will use the formula of speed to find the rate of change in meter/second. The formula of speed is:

\(\displaystyle{v = \dfrac{s}{t}}\)

where v is speed, s is distance and t is time. We know that distance is 4000 meters and time is 900 seconds. Substitute in the formula:

\(\displaystyle{v = \dfrac{4000 \ \, \sf{meters}}{900 \ \, \sf{seconds}}}\\\\\displaystyle{v = 4.44 \ \, \sf{m/s}}\)

Therefore, her speed is 4.44 m/s