If you're going 80 mph how long does it take to 80 miles

The problem involves the principles of projectile motion. The ball thrown upward reaches its peak in 2.5 seconds. The ball dropped from the building cover 15 meters in about 1.75 seconds. Therefore, after the peak, the first ball will take an additional 0.75 second to descend to the point where both balls are at the same height, about 3.25 seconds from the start.

This physics problem involves applying the principles of projectile motion. We start by calculating the time it takes for the ball thrown upward to reach its peak. Since acceleration acting against the motion of the first ball is gravity (9.8 m/s²), using the formula final velocity = initial velocity - (acceleration* time), and since the final upward velocity at the top is 0, we calculate the time it takes the throw up ball to peak as 2.5 seconds (0 = 25m/s - 9.8m/s² * t).

Next, we calculate the time it takes for a ball to fall 15m from rest (assume the drop from the building begins from rest). We use the formula h = 0.5*g*t² which we rearrange to solve for time, yielding t=√(2h/g). Using this formula with h = 15m, we get t ≈ 1.75 seconds.

Therefore, the ball thrown upwards must start to descend after reaching peak so that both balls meet at the same height. Subtracting the two times, we get 2.5 seconds - 1.75 seconds = 0.75 second. Ball 1 will take 0.75 seconds to descend so that both balls reach the same height at the same instance. So, after approximately 3.25 seconds from the start of projectile motion, the two balls will be at the same height.

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Final answer:

Acceleration is the rate of change of velocity over time. The acceleration of the air in m/s² when sneezing at 155 km/h in 0.70 s is approximately 61.51 m/s².

Explanation:

Acceleration is the rate of change of velocity over time. In this case, the air in your lungs accelerates from rest to 155 km/h in approximately 0.70 s. To calculate the acceleration in m/s², we convert the final velocity to m/s and use the formula for acceleration.

Given: Initial velocity = 0 m/s, Final velocity = 155 km/h = 43.06 m/s, Time = 0.70 s. Acceleration = (Final velocity - Initial velocity) / Time.

Substitute the values: Acceleration = (43.06 m/s - 0 m/s) / 0.70 s = 61.51 m/s².

Final answer:

To calculate the theoretical yield of C2H5Cl in the reaction between ethane and chlorine, you need to determine the limiting reactant and use stoichiometry to calculate the yield.

Explanation:

The reaction between ethane (C2H6) and chlorine (Cl2) produces mainly ethyl chloride (C2H5Cl), but other products such as dichloroethane (C2H4Cl2) may also be formed in smaller quantities. These additional products reduce the overall yield of ethyl chloride. To calculate the theoretical yield of C2H5Cl, we first need to determine the limiting reactant. This is done by comparing the stoichiometric ratios of the reactants: C2H6 and Cl2.

The balanced chemical equation for the reaction is:
C2H6 + Cl2 → C2H5Cl + HCl

To calculate the theoretical yield of C2H5Cl, you can use the following steps:

The resulting value will be the theoretical yield of C2H5Cl.

Answer:

D.  the density of the surrounding air and the density of water.

The buoyancy depends on D. the density of the surrounding air and the density of water.

be aware of how the buoyant pressure most effective depends on the density of the fluid ρ in which the object is submerged, the acceleration due to gravity g, and the quantity of the displaced fluid V f V_f Vf​V, start subscript, f, quit subscript. fairly the buoyant force doesn't rely upon the general depth of the item submerged.

the tendency of a frame to glide or to upward push whilst submerged in a fluid trying out an item's buoyancy.  chemistry: the electricity of a fluid to exert upward pressure on a frame positioned in it the buoyancy of water also : the upward force exerted.

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The direction of the current in a wire is influenced by the direction of the magnetic field and the movement of the wire in relation to this field. The thickness of the wire affects current amount but not direction. The type of magnet and the ammeter's needle do not determine the current's direction.

The direction of the current moving through a wire is affected by various factors, but let's discuss the pertinent ones here:

Factors such as the type of magnet and the direction of the needle on an ammeter do not affect the direction of the current. An ammeter is a tool used to measure current, not influence it. As for the type of magnet, it's the strength and orientation of the magnetic field it produces that matter, not its inherent type. The relationship between current and magnetic fields is a fundamental concept in electromagnetism, and understanding this relationship is crucial as it forms the basis of electrical motors and generators.

You throw a ball upward from a window at a speed of 1.5 m/s. Ball will be moving with velocity when it hits the sidewalk 2.6 m below is  7.3 ms⁻¹.

When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time. Uniform motion an object is said to have uniform motion when object cover equal distance in equal interval of time within exact fixed direction. For a body in uniform motion, the magnitude of its velocity remains constant over time.

Given in the question,

Initial Velocity (u)= 1.5 ms⁻¹

Final Velocity (v)=?

Acceleration=9.8 ms⁻¹ (remains constant on free fall problems)

Displacement (s)=-2.6 m

v² = u²+2as

v² = (1.5)²+2(-9.8)(-2.6)

v² = 53.21

v  = √53.21

v  = 7.2945 ≈ 7.3 ms⁻¹

Ball will be moving with velocity when it hits the sidewalk 2.6 m below is  7.3 ms⁻¹.

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If the acceleration of an object is negative, the object must be slowing down, which is true, as acceleration is the rate at which an object changes its velocity, if the acceleration is negative, it means that the velocity is decreasing over time.

Acceleration is a vector quantity that describes the rate at which an object's velocity changes and is the derivative of velocity with respect to time, so if the acceleration is negative, it means that the velocity is decreasing with respect to time. and can happen if the object is moving in the opposite direction from its initial velocity. This can be described by taking an example: if a car is moving forward with a velocity of 30 meters per second and its acceleration is -5 meters per second squared, it means that its velocity is decreasing at a rate of 5 meters per second.

Hence, if the acceleration of an object is negative, the object must be slowing down, which is true.

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First let us compute for the total growth in population.

Growth = 155 million * 0.01

Growth = 1.55 million

Since there are 12 months in a year, therefore the new jobs every month should be:

new jobs per month = 1.55 million / 12

new jobs per month = 0.129 million = 129,167 

To keep unemployment from increasing in a labor force of 155 million growing at 1.0 percent per year, around 129,167 new jobs need to be created each month.

If the labor force of 155 million people is growing by 1.0 percent per year, the total increase in the labor force per year would be 1.55 million people (155 million times 1%). To determine the number of new jobs needed to be created each month to keep unemployment from increasing, we divide this annual increase by 12 months. Thus, 1.55 million divided by 12 gives approximately 129,167 jobs that need to be created each month.

Approximately 0.0305 wine bottles can be purged with the argon in the canister.

Let's go through the calculations step by step:

Given:
- Pressure (\(P\)) = 1.26 atm
- Volume (\(V\)) = 0.75 L (converted from 750.0 ml)
- Temperature (\(T\)) = 283 K
- Ideal Gas Constant (\(R\)) = 0.0821 L·atm/(mol·K)

Now, use the ideal gas law to find the number of moles [tex](\(n\)):\[ n = \frac{PV}{RT} \][/tex]

[tex]\[ n = \frac{(1.26 \, \text{atm}) \times (0.75 \, \text{L})}{(0.0821 \, \text{L·atm/(mol·K)}) \times (283 \, \text{K})} \]\[ n = \frac{0.945}{23.2263} \]\[ n \approx 0.0408 \, \text{mol} \][/tex]

Now, let's assume that the argon canister contains pure argon, and we need to find out how many moles of argon are in a wine bottle. Argon's molar mass is approximately 39.95 g/mol.

[tex]\[ \text{Moles of argon in a wine bottle} = \frac{\text{Molar mass of argon} \times \text{Volume of the bottle}}{\text{Molar volume at STP}} \]\[ \text{Moles of argon in a wine bottle} = \frac{(39.95 \, \text{g/mol}) \times (0.75 \, \text{L})}{22.4 \, \text{L/mol}} \]\[ \text{Moles of argon in a wine bottle} \approx 1.34 \, \text{mol} \][/tex]

Finally, to find the number of wine bottles that can be purged with the argon in the canister:

[tex]\[ \text{Number of bottles} = \frac{\text{Total moles in canister}}{\text{Moles in one bottle}} \]\[ \text{Number of bottles} = \frac{0.0408 \, \text{mol}}{1.34 \, \text{mol/bottle}} \]\[ \text{Number of bottles} \approx 0.0305 \][/tex]

Therefore, approximately 0.0305 wine bottles can be purged with the argon in the canister.

Answer:

Neutron

Explanation:

Neutron is an electrically neutral subatomic particle found in the nucleus of an atom.

Protron is an electrically positive subatomic particle found in the nucleus of an atom.

Electron is an electrically negative subatomic particle found in the orbital of an atom.

Answer:

A physical quantity which is described completely by its magnitude only, is called a scalar quantity.

Examples- Velocity ,Temperature, Speed

Properties

A bag of sugar that weighs 1.50 lb (or 6.68 N) on Earth would weigh 1.11 N on the moon because the moon's gravity is only one-sixth as strong as Earth's gravity.

To find the weight of the bag of sugar on the moon, we first need to convert its weight on earth from pounds to newtons. As 1.0 lb is equivalent to 4.45 N, a 1.50-lb bag of sugar would weigh 6.68 N on Earth. On the moon, where the free-fall acceleration is one-sixth of what it is on Earth, this weight would be reduced by a factor of 6, giving a weight of approximately 1.11 N.

So, a 1.50-lb bag of sugar which weighs 6.68 N on Earth would weigh 1.11 N on the moon.

To understand why this is the case, it's necessary to understand that weight varies depending on location because it depends on the force of gravity. On the moon, gravity is only one-sixth as strong as it on Earth, which is why objects weigh less there.

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An insulated lunch bag uses materials that slow down heat transfer.

Importance of Features in Insulated Containers

An insulated lunch bag keeps food warm by utilizing materials that slow down heat transfer, complying with the principles of thermodynamics. To understand which features are most important in minimizing the rate of a hot beverage cooling, we need to consider the mechanisms of heat transfer: conduction, convection, and radiation. A metal lining might conduct heat, leading to quicker heat loss, unless it's part of a vacuum layer such as in a thermos. Insulating cup material, on the other hand, is crucial as materials like polystyrene or foam are poor conductors of heat and therefore reduce heat loss through conduction. The importance of a lid can't be overstated because it traps hot air and reduces heat loss through convection.

The ball hits the ground with a velocity of 19.6 m/s and it takes approximately 2.02 seconds for the ball to fall.

To determine the velocity the ball hits the ground at, we can use the equation v = gt, where g is the acceleration due to gravity, approximately 9.8 m/s². Since the ball falls for 2 seconds, the velocity is given by v = 9.8 m/s² * 2 s = 19.6 m/s. Therefore, the ball hits the ground with a velocity of 19.6 m/s.

To determine the time it takes for the ball to fall, we can use the equation h = (1/2)gt², where h is the height and t is the time. Rearranging the equation, we have t = √(2h/g). Substituting the given height of 20 m, the time is t = √(2 * 20 m / 9.8 m/s²) = √4.08 s ≈ 2.02 s. Therefore, the time for the ball to fall is approximately 2.02 seconds.

Answer:

At the bottom of swimming pool the pressure will be maximum.

Explanation:

Here as we know that pressure inside the water is given as

[tex]P = P_0 + \rho g h[/tex]

here we know that

[tex]P_0[/tex] = atmospheric pressure

[tex]\rho[/tex] = density of water

h = depth inside the water where pressure it to be required

So here from the above equation we know that pressure is increased as the depth inside the water is increased.

So in order to have maximum pressure inside the swimming pool we need to go at maximum depth position.

So it is at the bottom of the swimming pool pressure will be maximum.

If the resistance of an electric circuit is 12 ohms and the voltage in the circuit is 60 V the current flowing through the circuit is 5A

Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperatures remain constant

resistance = 12 ohm

voltage = 60 V

using ohm's law

V = IR

I = V/R

 = 60 / 12

 = 5 A

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First we calculate the force.

F = 8 *3 * 6 i + 13 j = 144 i + 13 j

F = sqrt (144^2 + 13^2) = 144.59 N

Then calculate the displacement d.

d = sqrt (3^2 + 6^2) = 6.71 m

Work is the produce of force and displacement, therefore:

W = F d = 144.59 N * 6.71 m

W = 970 J

The work done by the force on the particle which moves first along the y-axis from the origin and then parallel to the x-axis is 970 J.

Work done is the force applied on a body to move it over a distance. Work done can be calculated with the following formula.

[tex]W=F\times d[/tex]

Here (F) is the magnitude of force and (d) is the distance traveled.

The particle moves first along the y axis from the origin to the point (0,6m) and then parallel to the x axis until it reaches (3m,6m).

The particle is subject to a force,

[tex]\vec F=cxy\hat i+d\hat j[/tex]

Here,  c = 8.0 N/m2 and d = 13 N. The final point of the displacement of the particle is (3 m, 6 m).

Put the values of (x,y), c and d to find the value of force.

[tex]\vec F=(8)(3)(6)\hat i+(13)\hat j\\\vec F=144\hat i+13\hat j[/tex]

Solving this equation as,

[tex]F=\sqrt{(144)^2+(13)^2}\\F=144.59\rm\; N[/tex]

The initial position of the particle is at the origin (0, 0) and the final position of the particle is (3 m, 6 m). Thus, the displacement is,

[tex]d=\sqrt{(3-0)^2+(6-0)^2}\\d=6.71\rm\; m[/tex]

The work done will be,

[tex]W=144.59\times(6.71)\\W=970\rm\; J[/tex]

Hence, the work done by the force on the particle which moves first along the y-axis from the origin and then parallel to the x-axis is 970 J.

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