please answer part A and part B
You are driving through town at 10.0 m/s when suddenly a ball rolls out in front of you. You apply the brakes and begin decelerating at 3.4 m/s². 2
How far do you travel before stopping? Express you

Answer:

3149.181 N

Explanation:

the force exerted by the atmosphere can be calculated as

F = PA

Where P is the atmospheric pressure and A is the area of the sheet of paper.

The atmospheric pressure is P = 101325 Pa

And the area is equal to

A = Length x Width

A = 0.148 m x 0.210 m

A = 0.03108 m²

Because 14.8 cm = 0.148 m and 21.0 cm = 0.210 m

Now, we can calculate the force as

F = (101325 Pa)(0.03108 m²)

F = 3149.181 N

So, the force exerted is 3149.181 N

Answer:

2836.36 kg/m³

Explanation:

Applying,

Densty of granite(D')/Density of water(D) = weight of granite(W')/weight of water displaced(W)

D'/D = W'/W................... Equation 1

Make D' the subject of the equation

D' = W'D/W............... Equation 2.

From the question,

Given: W' = mg = 9.8(15.6/1000) = 0.15288 N, W = 9.8(5.5/1000) = 0.0539 N, Constant: D = 1000 kg/m³

Substitute these values into equation 2

D' = 1000(0.15288)/0.0539

D' = 2836.36 kg/m³

The appropriate term for each statement is as follows;

Weight is the force on an object due to the gravitational attraction between it and the Earth (or whatever astronomical object it is primarily influenced by).

Mass, on the other hand, is a quantity of matter cohering together so as to make one body, or an aggregation of particles or things which collectively make one body or quantity.

Weight is measured in Newton's because it is a force while mass is measured in kilograms. The weight is affected by the gravity of the planet the object exists.

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At 0.9 cm from the toroid's center, there is a 0.053 T magnetic field present.

the details provided;

The toroid's inner radius is 1.3 cm (0.013 m) and

its outer radius is 2.6 cm (0.026 m).

There are 1080 revolutions in the toroid.

carries a current of 2.1.

The following formula is used to compute the magnetic field at a distance of 1.95 cm from the toroid's center:

B= (μNI)/2\(\pi\)R

B=(4\(\pi\)*\(10^{-7}\))*(1080)*(2.1)/2\(\pi\)*0.0195

B=0.023 T.

The magnetic field is the area in which a magnet produces its magnetic effects. To describe how the magnetic force is dispersed in the area around and inside something magnetic in nature, we utilize the magnetic field as a tool.

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The correct answer is(b). There is a physical change from the solid state to a gas state where energy between the molecules increases.

During sublimation, carbon dioxide transitions directly from the solid state (dry ice) to the gas state without passing through the liquid phase. In this process, individual molecules of carbon dioxide gain energy from the surroundings, leading to an increase in their kinetic energy and molecular movement.

As a result, the carbon dioxide molecules separate from each other and form a gas. This phase change is considered a physical change rather than a chemical change since the chemical composition of carbon dioxide remains the same throughout the process.

Therefore, the sublimation of carbon dioxide results in a physical change where the molecules transition from the solid state to the gas state, gaining energy and increasing their molecular movement.

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The value of jam density is 17.864 kml.

Jam density refers to excessive visitor density while site visitors waft stops absolutely, commonly within the range of 185–250 cars in keeping with mile per lane. but, calculations approximately congested networks are greater complex and rely extra on empirical research and extrapolations from real avenues counts on on.

Density is increased with the aid of human beings joining a street from on-ramps, and this causes automobiles to gradually down, i.e. human beings are generally horrific at merging at pace. Then some humans who've been held up inside the left-hand lane flow to the center lane which causes the identical problem in the middle lane – visitors back up.

Given,

у = 90 km/ max = 3300 ven Ihr Sa Calculate Jam density,

• ІК, 4- 27 = 900 x Е. 4 allega 40 vellum) Put all valu

- 224² = 1980 4 - 28350 to a 224²-19804 + 28350 20 after folving

TH=72.14 kalho and 14a 17.864 kml.

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Answer:

Current- the flow of free charges, such as electrons and ions

Drift velocity- the average speed at which these charges move

Answer:

An electric current is the stream of changed particals, such as electrons & ions, moving through an electrical conductor.

The average velocity attained bycharged partical ,such as electrons,in a material due to electric fields

Answer:  \(135.48\ m/s^2\) ,\(13.82g\)

Explanation:

Given

Missile velocity raises from 0 to \(8.4\ km/s\)

Time taken \(t=62\ s\)

Convert velocity into m/s

\(\Rightarrow 8.4=8.4\times 1000=8400\ m/s\)

Acceleration is the change of velocity w.r.t time

\(\Rightarrow a=\dfrac{8400-0}{62}\\\\\Rightarrow a=135.48\ m/s^2\)

In terms of gravity, it is

\(\Rightarrow \dfrac{135.483}{9.8}=13.82\)

Therefore, acceleration in terms of g is \(13.82g\)

Answer:

Explanation:

It starts out as chemical potential energy and when the switch is turned on, the chemical energy is transformed into electrical energy.

potential chemical energy

electrical energy.

The characteristics of image formed is a real, inverted, highly magnified image and at infinity.

The following are the general properties of image formed by a convex lens when the object is placed at focal point of the lens;

Thus, when an object is placed at the focal point of a convex lens, the image formed is a real, inverted, highly magnified image and at infinity.

These properties can be seen in the ray diagram attached to this solution.

To construct the ray diagram, draw a line from the top of the image through the focal point and principal axis.

If you look at the lens diagram carefully, you will notice that;

So the object is placed at the focus of the lens.

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-2.214*10^4 W power is needed to keep the car travelling at a constant 75 km /h

From the question, we have

Mass (m)=1150kg

Initial velocity= v_0=85 km/h =23.6 m/s

Final velocity = v=65 km/h=18.06 m/s

acceleration (a)=v-v_0/t=18.06-23.6/6.0=-0.924 m/s^2

The force acting on the car is

F=ma

=(1150 kg)(-0.924 m/s^2)

=-1062.7 N

power (P)=Fv

=(-1062.7)(75(5/18))

=-2.214*10^4 W

Force:

According to physics, the force is an influence that has the power to change how an object moves. When a mass-containing object increases its velocity, such as when it travels away from rest, a force can cause it to accelerate. A push or a pull is a simple method to explain force. Since a force has both a magnitude and a direction, it is a vector quantity. It is calculated using the newton SI unit (N). The letter F is used to represent force. This can provide a clear understanding of how forces are defined because they are thought of as pushes or pulls.

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Answer:

C.the coefficient of friction

Explanation:

Hope this helps. can i have brainliest thanks!

The buoyant force of 55400 N acting on the blimp and the volume of the blimp is 4527 m³.

The buoyant force is the upward force experienced by an object when the object is immersed in the fluids. It is obtained from the product of density, volume, and acceleration due to gravity(g).

From the givens,

Fb = ρ×V×g

Fb  (the buoyancy force) = 54400 N

ρ (the density of the fluid (air)) = 1.225 kg/m³

V (volume of the fluid) =?

g  (acceleration due to gravity) = 9.81 m/s²

V = Fb / ρ×g

  = 54400 / (1.225×9.81)

 = 4526.7 m³.

The volume V of the blimp is 4526.7  m³.

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When communication occurs asynchronous, it doesn't happen immediately (e.g. on the phone, in-person, or during a live video conferencing meeting). The statement is true

What about asynchronous communication is accurate?

Information can be exchanged asynchronously when there is no need for timing. The recipient can respond to the message whenever it is convenient for them because it doesn't demand their immediate attention. Emails, forums, and group documents are a few examples of asynchronous communication.

What drawback does asynchronous communication have?

Despite all of its benefits, asynchronous communication for distant teams has drawbacks. feelings of loneliness Some employees may feel alone or alienated due to a lack of in-person interactions or meetings. There is no relationship.

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Asynchronous communications does not happen in real time.

True/ false

The cT air mass would have the greater specific humidity; SPECIFIC HUMIDITY is the weight (amount) of vapour contained in a unit weight (amount) of air.

Relative humidity, which is frequently stated as a percentage, describes how humid it is right now in comparison to how humid it would be at its maximum temperature. The proportion of vapour mass to all moist air parcel mass is known as specific humidity. Surface longevity depends heavily on humidity.

The most accurate way to measure humidity is with a unit called the specific humidity unit. The specific humidity unit, g.kg-1, is used to quantify the weight of water vapor per unit weight of air. This measurement is made in grams of water vapor per kilogram of air.

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The first step is to convert the parallax angle of the star to distance. We can use the formula: parallax angle in arc seconds = (distance to star in parsecs)^-1 We can rearrange this equation to isolate distance: d = (parallax angle)^-1 Therefore, the distance to the star in parsecs is:

d = (0.0190 arcseconds)^-1 = 52.6 parsecs Next, we need to find the actual distance in meters. One parsec is equivalent to 3.09 × 10^16 meters. Therefore, the distance to the star in meters is: distance = (52.6 parsecs)(3.09 × 10^16 meters/parsec) = 1.63 × 10^18 meters Now, we can use the formula for time: d = vt Solving for time: t = d/v We are told to travel at half the speed of light, which is v = 0.5c, where c is the speed of light.

Therefore, the time to travel to the star is: t = (1.63 × 10^18 meters)/(0.5c) Using the speed of light, c = 3.00 × 10^8 m/s, we get: t = (1.63 × 10^18 meters)/(0.5 × 3.00 × 10^8 m/s)t ≈ 10.9 years Therefore, it would take about 10.9 years to travel to the star if traveling at half the speed of light.

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Answer:

Sunlight is a mixture of colors. When it passes through a glass prism, some of the light is bent, or refracted, more than other portions. And just as sunlight passing through a prism is bent, so is sunlight passing through drops of water. This produces an atmospheric solar spectrum in the sky for all to see: a rainbow.

Explanation:

The  safely removing a needle from a syringe based on safe sharps work practices is to use a needle box equipped with a needle removal device that permits the needle to fall directly into the needle box or sharps container when removed.

This method ensures that the needle is immediately disposed of in a safe manner, reducing the risk of accidental needlestick injuries. It is important to never remove the needle by twisting off the syringe directly by hand, as this can cause the needle to become dislodged and potentially cause harm. Similarly, asking a colleague to hold the syringe while you twist the needle off by hand also poses a risk. Recapping the needle with forceps before removing it by hand is also not recommended, as it increases the risk of needlestick injuries. Therefore, using a needle box equipped with a needle removal device is the safest and most effective method for removing a needle from a syringe.

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Answer:

I don't know how it works, but I found this on the internet. image does not belong to me.

hope it helps!

Answer:

X-RAY

Explanation:

I took the test on study island

Answer:

here we go

Explanation:

\(density \: = mass \div volume \\ mass \: = density \times volume \\ \\ but \: our \: volume \: is \: in \: cubic \: metres \\ convert \: it \: to \: cubic \: centimeters \\ volume \: = 25 \div {(100)}^{3} \\ = 2.5 \times 10^{ - 5} cm^{3} \\ \\ mass = 11 \times (2.5 \times 10 ^{ - 5} ) \\ = 2.75 \times 10 ^{ - 4} grams\)

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Answer:

b. 1.1 m/s c. -1.1 m/s

Explanation:

b.

m x v=f x t

The mass is 10 kg

10 x v (equation for momentum) = f x t (impulse)

you would find the impulse by finding the area under the graph, and then dividing by the mass

So in this case:

10 x v = 11

then divide by the mass

v = 11/10

v= 1.1 m/s

c.

F x t = impulse

we are trying to find force (magnitude)

impulse/t = F

we said that in order for it to stop the impulse for b would be 11, so if thats the case it would be 11 but it would be negative because when going in a positive direction and suddenly stopping the direction changes.

-11/t = F

to find t all we need to do is find the amount of seconds between 10 and 20, that would be 10.

-11/10 = F

F= -1.1 m/s

Answer B:

The velocity of the box at 10 seconds is :

              m x v=f x t

Given Information :

Mass(m)=10kg

Therefore, the velocity of the box at 10 seconds is 1.1m/s.

Answer C:

The magnitude and direction of that force be :

F x t = impulse

To find t all we need to do is find the amount of seconds between 10 and 20, that would be 10.

The magnitude and direction of that force will be -1.1m/s.

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There will be no heat transmission, and the system's work is 25.27 Kj.

The calculation for total heat transfer and work production:

Provided,

The mass of r-134a = 0.7 kg

Initial pressure of the system, P₁ = 800 kpa

Initial temperature of r-134a, T₁ = 50°C = 273+ 50 = 323 K

Final pressure of the system, P₂ = 140 kpa

From the superheated refrigerant r-134a

P₁ = 800 kpa & T₁ = 50°C

the internal energy, u₁ = 263.87 Kj/kg &

the entropy, s₁ = 0.9803 Kj/kg .K

There won't be any heat transmission because the process is isentropic.

So, Q = 0 KJ

Due to the isentropic nature of the operation, the ultimate entropy is determined by

s₂ = s₁ = 0.9803 Kj/kg .K

From the r-134a superheated refrigerant

at P₂ = 140 kpa & entropy s₂ = 0.9803 Kj/kg .K

the internal energy,u₂ = 227.77 K/kg

The work on the system is provided by

W = m x (u₂-u₁)

W = 0.7 x(227.77 - 263.87)

W = 0.7 x (-36.1)

W = -25.27 KJ

A negative number means the system is doing the task.

As a result, there won't be any heat transfer, and the system will only have used 25.27 KJ of energy.

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The impulse exerted on the ball by the wall is -24i N s, the answer is option b.

The impulse exerted on the ball by the wall can be determined using the impulse-momentum theorem.

Impulse is equal to the change in momentum.

That is,

J = Δp

Since momentum is a vector,

p = mv

Substituting the values,

p(initial) = mv(initial) = 3.0 kg × (4i + 3j) m/s

p(initial) = 12i + 9j N s

p(final) = mv(final) = 3.0 kg × (-4i + 3j) m/s

p(final) = -12i + 9j N s

Change in momentum,

(Δp) = p(final) - p(initial)

      = (-12i + 9j) N s - (12i + 9j) N s

      = (-12 - 12)i + (9 - 9)j N s

      = -24i N s

Thus, the impulse exerted on the ball by the wall is -24i N s, which means that the answer is option b.

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By Ohm's Law, the voltage across the circuit is D. 12 v.

We need to know about Ohm's Law to solve this problem. Ohm's Law describes the relationship between voltage and current. It can be determined as

V / I = R

where V is voltage, I is current and R is resistance.

From the question above, we know that

I = 0.5 A

R = 24 Ω

By substituting the following parameters, we can calculate the voltage

V / I = R

V = I x R

V = 0.5 x 24

V = 12 volt

Hence, the voltage is 12 volts.

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The final velocity of April, the skateboard, and the watermelon after the collision is 0.18 m/s.

The final velocity of April, the skateboard, and the watermelon after the collision is calculated by applying the principle of conservation of linear momentum as shown below;

m1u1 + m2u2 = v (m1 + m2)

where;

(55 x 0) + (2 x 5) = v (55 + 2)

10 = 57v

v = 10/57

v = 0.18 m/s

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An object's mass remains unchanged everywhere while the weight of an object depends on gravity, it is a measurement of how much gravity has an impact on an object. Therefore, an object’s mass, rather than its weight is used to indicate the amount of matter it contains.

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Answer: The work done by a horizontal spring with spring constant k expanding from a compression distance of x to an extension distance of x due to an attached mass is kx².

Explanation:

When a spring expands or compresses, it does work on the object attached to it. The work done by a spring on an object is given by the formula:

W = (1/2) k (x₂² - x₁²)

where W is the work done by the spring, k is the spring constant, x₁ is the initial compression distance, and x₂ is the final extension distance.

In the given scenario, the spring is expanding from a compression distance x to an extension distance of x due to an attached mass. The initial compression distance is x₁ = -x, and the final extension distance is x₂ = x. Therefore, the work done by the spring is:

W = (1/2) k (x₂² - x₁²) = (1/2) k [(x)² - (-x)²] = (1/2) k (2x²) = kx²

Hence, the work done by a horizontal spring with spring constant k expanding from a compression distance of x to an extension distance of x due to an attached mass is kx².

The resultant waveform is in the picture is y1

Superposition of waves is a phenomenon that occurs when two or more waves travel through the same medium and combine together to form a new wave.

When waves superpose, their amplitudes and frequencies add up or cancel out at different points in space and time, resulting in a complex pattern of constructive and destructive interference.

The principle of superposition is a fundamental concept in physics and is used to describe many wave phenomena, such as interference, diffraction, and standing waves. It states that when two or more waves overlap in space, the resultant wave at any given point is the algebraic sum of the individual waves at that point.

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