A bus is running with a velocity of 72 km.hr on seeing a a boy on the road tom a head the driver jammed on the brakes and the bug Stopped witts uniform retradtion 5 m/s2 calculate the distance travelled by bus and discuss whether accident took place or not. ​

The initial speed of the projectile is 18.5m/s

Projectile motion is the motion of an object thrown into the air under gravity. Examples of projectiles include a fired bullet, a thrown javelin e t.c

When a projectile is launched horizontal, it's horizontal range is given as R = u(√2h/g)

R = 300ft = 91.44meters

h= 120m

therefore 91.44= u( √ 2×120/9.8)

91.44 = u ( √24.49)

91.44 = 4.95 u

divide both sides by 4.95

u = 91.44/4.95

u = 18.5m/s

therefore the speed of the projectile is 18.5m/s

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The electric field due to these charges at some point a great distance from them is zero.

Electric field is a physical field created by a static electric charge or a changing electric charge. It is a vector field that exerts force on other charged particles. Electric fields are created when electric charges are separated, and the strength of the field is determined by the amount of charge and the distance from the charge.

This is because the electric field from an individual charge is inversely proportional to the square of the distance from it, and so the electric field from the two charges cancel each other out when the distance is greater than the separation between the electron and proton.

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The water budget equation for the Creek drainage basin is: Precipitation = Stream discharge + Evapotranspiration ± Change in storage.

To develop the water budget equation for this problem, we need to account for the inputs and outputs of water in the Creek drainage basin. The water budget equation can be expressed as,

P = Q + ET ± ΔS

P = Precipitation input (mm)

Q = Stream discharge (m³/s)

ET = Evapotranspiration (mm)

ΔS = Change in storage (mm)

First, let's convert the units of the given values,

Precipitation input (P) = 550 mm

Stream discharge (Q) = 1.8 m³/s

Now, let's determine the evapotranspiration (ET) and change in storage (ΔS) terms. However, the problem doesn't provide information about ET, so we cannot calculate it accurately. The problem doesn't provide information about ΔS, so we cannot calculate it accurately.

Given these limitations, we can write the simplified water budget equation for this problem,

550 mm = 1.8 m³/s + ET ± ΔS

Please note that without information about evapotranspiration and changes in storage, we cannot fully determine the water budget for the Creek drainage basin.

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Answer:

The range of the projectile can be calculated using the formula:

R = (v^2/g) * sin(2θ)

where v is the initial velocity, g is the gravitational acceleration, θ is the launch angle.

Substituting the given values:

R = (30^2/32.2) * sin(2*52)

R = 72.7 ft

Therefore, the answer is B. 72.7 ft.

Answer:

Explanation:

The pressure at one end of the piston is equal to the pressure on the second piston.

Pressure = Force/Area

F1/A1 = F2/A2

Given

F1 = 250N

A1 = 2.0m²

A2 = 0.5m²

F2 = ?

Substituting the given values in the formula;

250/2 = F2/0.5

cross multiply

250*0.5 = 2F2

125 = 2F2

F2 = 125/2

F2 = 62.5N

Hence the  force needed to lift this piston if the area of the second piston is 0.5 m^2 is 62.5N

Sure ,Let's find angle between forces

\(\\ \sf\longmapsto R^2=A^2+B^2+2ABcos\theta\)

\(\\ \sf\longmapsto 27^2=20^2+40^2+2(20)(40)cos\theta\)

\(\\ \sf\longmapsto 729=400+1600+1600cos\theta\)

\(\\ \sf\longmapsto 729=2000+1600cos\theta\)

\(\\ \sf\longmapsto 1600cos\theta=-271\)

\(\\ \sf\longmapsto cos\theta=-0.169\)

\(\\ \sf\longmapsto \theta=cos^{-1}(-0.169)\)

\(\\ \sf\longmapsto \theta=80.2°\)

Answer:

Not really, because wearing a mask can lower your immune system and covid can be caught like any other virus body contact and body fluids. So since you can still get it through those ways then you're going to get it and be worse off than if you don't wear a mask.

you can test this by not wearing a mask and see how not bad it is catching covid over getting it while you wear a mask.

Explanation:

Answer:

Yes

Explanation:

Hypothesis- if masks are used to protect yourself from Covid-19 then the spread of the virus will decrease

You could test this by:

Getting a mask and using materials such as shampoo, soap, honey, glue,  or (safe) chemicals to see how much the masks absorbs the materials. By doing so you can show how the mask can help block certain materials from entering or leaving the mask area therefore slowing the spread of Covid.

The maximum height travelled by the ball is 189.23 m.

The maximum height travelled by the ball is calculated by applying the following kinematic equation as shown below.

h = vt + ¹/₂gt²

where;

h = ( 64.1 m/s x 4.5 s )  -  ¹/₂ ( 9.8 m/s² ) ( 4.5 s )²

h = 189.23 m

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Maritime tropical air masses are those which originate over the warm oceans in low-latitude regions. The temperature in these regions is typically warm and humid, with dew-point values around or above 60°F (15°C). These air masses can bring significant amounts of moisture to areas that they move over, resulting in heavy precipitation events in some instances.

1. Range of temperatures within the maritime tropical air mass: Maritime tropical air mass temperatures typically range between 18°C (64°F) and 27°C (80°F), which is equivalent to a warm, humid environment. This range is typical for tropical regions where water temperatures are high enough to fuel the formation of a maritime tropical air mass.

2. Range of dew-point values within the maritime tropical air mass:Dew-point values within the maritime tropical air mass generally range between 60°F (15°C) and 75°F (24°C). These values are also typical for the warm, humid environment that this type of air mass originates from.

3. Predominant wind direction in the maritime tropical air mass:The predominant wind direction in a maritime tropical air mass depends on the region it is in. In the Northern Hemisphere, the predominant wind direction is from the southeast, while in the Southern Hemisphere, it is from the northeast.

These wind directions are due to the rotation of the Earth and the Coriolis Effect.4. Difference in wind speed and direction between the eastern and western sides of the cold front: The eastern side of a cold front experiences stronger, gusty winds that are colder, while the western side experiences weaker winds that are warmer.

This is due to the differences in pressure and temperature that occur on either side of the cold front. The pressure gradient is steeper on the eastern side, leading to stronger winds, while the western side experiences less of a pressure gradient and weaker winds.

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Answer:

5 m/s

Explanation:

Given that,

A vehicle is moving with 20m/s towards the east and another is moving 15m/s towards the west​.

It is assumed to find the resultant velocity of the vehicle. Let east side is positive and west is negative. So,

\(v=v_1+v_2\\\\=20+(-15)\\\\=5\ m/s\)

Hence, the resultant velocity of the vehicle is equal to 5 m/s.

Using the free body diagram, let's determine the scenario the diagram illustrates.

From the free body diagram, we can see that the weight is acting on the object while the tension will be the force which supports the object.

The tension in this case, helps hang the object while the weight is the product of the mass of the object and the force of gravity acting on the object.

Tension can be defined as the pulling force transmitted through a rope or string.

Therefore, the best scenario which is represented by the free body diagram is a sign board supported by two strings.

ANSWER:

A signboard supported by

Friction is the force that acts on the opposite side of direction of force, thus it manages to decelerate an object, so it acts upward along the plane

Answer:

Troposphere

High-pressure areas form due to downward motion through the troposphere, the atmospheric layer where weather occurs.

When you stand in front of a mirror and reach out with your right hand to shake hands, the image will remain the same size and the hand that the image will extend is the left hand.

A plane mirror is a type of mirror that is not curved and that has a flat reflective surface.

The characteristics of a plane mirror include the following:

When you stand in front of a mirror and reach out with your right hand to shake hands, the image will remain the same size because image size of a plane mirror is the same size with the object.

Also, the hand that the image will extend is the left hand because the image is laterally inverted.

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Answer: Images formed by plane mirrors are upright and life-sized, or equal in size to the object that is being reflected, but it shows things in reverse, or as a “mirror image.”  Also, if someone was standing five feet from the mirror, it would appear that the reflection inside the mirror was also five feet away, which is impossible.  The brain is tricked into seeing the light bouncing off of the surface of the mirror as coming from a point inside, or behind the mirror.

The equivalent resistance of the circuit is 65.98 Ω.

What is Resistor?

A resistor is an electrical component that limits or regulates the flow of electrical current in a circuit. It is designed to provide a specific amount of resistance to the flow of electrons, measured in ohms, and is typically made of a material that can resist the flow of electricity, such as carbon or metal. Resistors are used in a wide range of electronic devices and circuits, from simple LED flashers to complex computer systems.

To find the equivalent resistance of the circuit, we need to use the formula for resistors in parallel:

1/Req = 1/R1 + 1/R2 + 1/R3 + 1/R4

where Req is the equivalent resistance, and R1, R2, R3, and R4 are the resistances of the four resistors.

Substituting the given values, we get:

1/Req = 1/6.60 × 102 + 1/2.40 × 102 + 1/2.00 × 102 + 1/2.00 × 102

1/Req = 0.01515

Req = 65.98 Ω

Therefore, the equivalent resistance of the circuit is 65.98 Ω.

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7.31 x 10⁵ m/s velocity will an electron have a wavelength of 3.09 m by the de Broglie equation

The wavelength of an electron is given by the de Broglie equation, λ = h/mv, where h is Planck's constant (6.626 x 10⁻³⁴ J s), m is the mass of the electron (9.109 x 10⁻³¹ kg), v is the velocity of the electron, and λ is the wavelength.

This is so because a particle's de Broglie wavelength and positional uncertainty are inversely correlated, meaning that as momentum increases, the de Broglie wavelength also decreases.
To find the velocity at which an electron will have a wavelength of 3.09 m, we can rearrange the equation to solve for v:
v = h/(mλ)
Plugging in the values, we get:
v = (6.626 x 10⁻³⁴ J s)/(9.109 x 10⁻³¹ kg ₓ 3.09 m)
v = 7.31 x 10⁵ m/s
Therefore, an electron will have a velocity of 7.31 x 10⁵ m/s to have a wavelength of 3.09 m.

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The scenario provided is an excellent model for fission, as it demonstrates the chain reaction that occurs when a neutron collides with a uranium nucleus and splits it into two smaller nuclei, releasing a large amount of energy in the process.

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The acceleration of the ball during the throwing motion is 5.28m/s².

Acceleration is defined as rate of change  of velocity w.r.t time.

a = dv/dt

velocity is the rate of change of displacement with respect to time.

final velocity ,

v = 37m/s

initial velocity,

u = 0m/s

distance, s = 3.5m  

acceleration = ?

equation of motion describes simple Concept of the motion make position, velocity, acceleration of an object.

Using the equation of motion

v² = u² + 2as

using above values we get

(37)² =(0)² + 2× a × 3.5

a = 37/7

a = 5.28m/s²

The acceleration of the ball during the throwing motion is 5.28m/s².

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Answer:

Oh god

i have nooooo idea

False. Type III Portland cement is a high-early-strength cement, which means it gains strength faster in the early stages of curing. However.

the long-term compressive strength of concrete using Type I Portland cement (general-purpose) is generally higher. Type I cement has a slower hydration rate, allowing for more complete and denser hydration of the cement particles over time, resulting in stronger concrete in the long run. So, Type I cement is preferred for applications where long-term strength and durability are critical, such as structural elements in buildings and bridges. Type III Portland cement is a high-early-strength cement, designed for rapid strength development in the early days of concrete curing. However, Type I Portland cement (general-purpose) generally results in higher long-term compressive strength. Type I cement has a slower hydration rate, allowing for more complete and denser hydration over time, leading to stronger and more durable concrete in the long run.

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Correct question is;

2, A rectangular Container of base 50 cm by 30cm is filled with water to be depth of 5cm. how much is the pressure exerted at the base? (take pw= 1000kg /m3 and g=10m/s)​

Answer:

P = 500 N/m²

Explanation:

Pressure exerted at the base is the hydrostatic pressure and it is given by the formula;

P = ρgh

Where;

ρ is density = 1000 kg/m³

g = 10 m/s²

h is depth = 5 cm = 0.05 m

Thus;

P = 1000 × 10 × 0.05

P = 500 N/m²

Answer:

X-Ray

Explanation:

ON EDGE 2021

The electromagnetic wave that the CT scans are based on is called an X-ray.

When an electric field combines with a magnetic field, electromagnetic waves are created. An electromagnetic wave's magnetic and electric fields are oriented in a way that both are at right angles to each other and to the wave's direction.

Here,

A CT scan can be used to visualize almost every region of the body, and it is used to plan medical, surgical, or radiation treatments as well as detect diseases and injuries.

A narrowly focused, extremely sensitive x-ray beam that is employed in CT scanners scans the body in one particular plane. A rotating x-ray tube is used to operate the scanner as it revolves around the patient. Through the area of the body being examined, an x-ray beam is sent out in the shape of a fan.

Electromagnetic radiation includes X-rays. The highly intense X-ray photons can destroy live cells by fracturing molecules when emitted with tremendous energy.

Hence,

The electromagnetic wave that the CT scans are based on is called an X-ray.

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When the two children along with the toy should be pulled in various directions. The total force after all the forces should be added together that we called the net force.

It is the sum of the forces that acted on the particle or the body. It is treated as the single force that eliminates the impact of the real force with respect to the particle motion. It provides the particle that contain the similar acceleration. Also, here we use the second law of motion,

In this way it should be explained.

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Answer:

Plate tectonics from the oceans, continents, and mountains. It also helps us understand why and where events like earthquakes occur and volcanoes erupt. What if there were no plate tectonics? If all plate motion stopped, Earth would be a very different place.

Explanation:

I did it

5.83 N-E will be displacement when car travel 3km due north then 5km east.

the resultant displacement =\(\sqrt{3^2+5^2}\)

   = 5.83 N-E

Being a vector quantity, displacement has both a magnitude and a direction. The vector (or straight line) distance between an initial and final position is what is meant by this term. Knowing these two places is consequently all that is necessary to determine the resultant displacement.

Calculate the inverse tangent of the ratio of the displacement components in the y- and x-directions to determine the direction of the displacement vector.

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Answer:

Mars is an opportunity for humans to carry forward the light of consciousness, plus it is the closest planet like earth, it has land humans can land on and although its small, theres still water

The boundary conditions have a positive effect on the finite difference formulation of interior nodes of the medium. Boundary conditions provide constraints or information at the edges of a computational domain to determine the behavior of the system. In the finite difference method, the values at the boundary nodes are usually known or specified. By incorporating these boundary conditions into the formulation, the behavior of the system is better represented.

When the boundary conditions are properly applied, they help ensure that the finite difference scheme accurately captures the desired physics within the interior nodes. This positive effect allows for more accurate and reliable simulations, as the behavior at the boundaries influences the behavior of the entire system. Boundary conditions have a positive effect on the finite difference formulation of interior nodes. By incorporating the known or specified conditions at the boundaries, the accuracy and reliability of the finite difference method are improved, allowing for a more faithful representation of the desired physics within the system.

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The buoyant force on an object is equal to the weight of the fluid displaced by the object. Using this principle and given values, the magnitude of the buoyant force on the block is 2136.8 N.

According to Archimedes' principle, the buoyant force on an object is equal to the weight of the fluid displaced by the object. This means that the upward force exerted by the fluid on the object is equal to the weight of the fluid that would occupy the same volume as the object if it were not present. Therefore, we need to find the weight of the fluid that is displaced by the block.

Given that the block floats with 0.52 of its volume submerged in the liquid of density 1300 kg/m3, we can find the volume of the fluid displaced by the block as follows:

The volume of fluid displaced = 0.52 × Volume of block

= 0.52 × 0.4 m3

= 0.208 m3

The weight of the fluid displaced by the block can be found using the density and volume of the fluid as follows:

Weight of fluid displaced = Density of fluid × Volume of fluid displaced × Acceleration due to gravity

= 1300 kg/m3 × 0.208 m3 × 9.8 m/s2

= 2136.8 N

Therefore, the magnitude of the buoyant force on the block is 2136.8 N.

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The radiation responsible for heating the air next to the earth’s surface as you walk around the ASU campus in the shade this time of year is Infrared radiation emitted by the Earth.

The sun is the most significant energy source for Earth. The sun emits radiation, which reaches Earth in the form of electromagnetic waves. The energy is emitted from the sun as direct or indirect solar radiation.

Direct solar radiation occurs when the sun's energy reaches Earth in a straight line without being altered by the Earth's atmosphere.

Indirect solar radiation, on the other hand, occurs when the sun's energy is scattered and redirected by the Earth's atmosphere before it reaches Earth's surface.

The direct and indirect solar radiation heats the air close to the earth's surface. As the surface of the earth absorbs this solar radiation, it re-emits a part of this energy in the form of infrared radiation. The infrared radiation is released into the atmosphere, where it heats the air close to the earth's surface. As a result, the air near the ground gets heated, which creates warm temperatures that you may experience while walking around the ASU campus in the shade.

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The standard molar entropy change  \(($\Delta S$)\) for the formation of 1 mole of PCl5 from its elements can be calculated using the standard molar entropies of the reactants and products.

The standard molar entropy change  \(($\Delta S$)\) for a reaction can be determined by subtracting the sum of the standard molar entropies of the reactants from the sum of the standard molar entropies of the products.

The balanced equation for the formation of 1 mole of PCl5 from its elements is:

\(\[ \Delta PCl_5 = P + Cl_2 \rightarrow PCl_5 \]\)

The standard molar entropy of PCl5 is known to be 311.6 J/(mol·K), and the standard molar entropy of Cl2 is 223.1 J/(mol·K). The standard molar entropy of phosphorus (P) is 41.09 J/(mol·K).

To calculate the standard molar entropy change \(($\Delta S$)\), we subtract the sum of the standard molar entropies of the reactants from the sum of the standard molar entropies of the products:

\(\[ \Delta S = (S_{PCl_5}) - (S_{P} + S_{Cl_2}) \]\)

Substituting the values:

\(\[ \Delta S = (311.6 \, \text{J/(mol·K)}) - (41.09 \, \text{J/(mol·K)} + 223.1 \, \text{J/(mol·K)}) \]\)

Simplifying:

\(\[ \Delta S = 47.41 \, \text{J/(mol·K)} \]\)

Therefore, the standard molar entropy change \(($\Delta S$)\) for the formation of 1 mole of PCl5 from its elements is 47.41 J/(mol·K).

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To find ΔS for the formation of 1 mol of PCl5 from its elements, subtract the entropy of the reactants from the entropy of the products.

To find the change in entropy (ΔS) for the formation of 1 mol of PCl5 from its elements, you need to use the equation:

ΔS = ΔS(products) - ΔS(reactants)

Since the reaction involves the formation of 1 mol of PCl5, the ΔS(products) will be the entropy of 1 mol of PCl5. The ΔS(reactants) will be the entropy of the elements P and Cl2. You can use tabulated values of entropy to calculate the change in entropy for the reaction.

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