Write an expression for the magnitude of the normal force, fn, acting on the block, in terms of f2 and the other variables of the problem. assume that the surface it rests on is rigid.

First let us calculate the acceleration.

v1 = v0 + a t1

where v1 is final velocity, v0 is initial velocity, a is acceleration and t is time

Calculating for a:

14 m/s = 7 m/s + a * 8 s

a = 0.875 m/s^2

Therefore the final speed is calculated similarly:

v2 = v1 + a t2

v2 = 14 m/s + (0.875 m/s^2) * 16 s

v2 = 28 m/s

True

A scientific law only states that an event occurs.

Hope this helps!

The magnitude of the vector is approximately 50.5 units and its direction is around 122.6 degrees with respect to the positive x-axis, which lies in the second quadrant.

To find the magnitude and direction of a vector with an x component of -27.5 units and a y component of 43.0 units, we can use the Pythagorean theorem and trigonometry. The magnitude of the vector is calculated using the formula \( \sqrt{x^2 + y^2} \). Plugging in the values, the magnitude (R) is \( \sqrt{(-27.5)^2 + (43.0)^2} \) which equals approximately 50.5 units. To determine the direction, we calculate the angle (θ) with respect to the positive x-axis using the arctangent function \( \tan^{-1}(\frac{y}{x}) \). Since the x-component is negative and the y-component is positive, the vector lies in the second quadrant. Thus, the angle from the positive x-axis is \( \tan^{-1}(\frac{43.0}{-27.5}) \) plus 180 degrees (to adjust for the quadrant), which gives us an angle of approximately 122.6 degrees.

The height of the building is 12.898 meters.

First, we calculate the time of flight using the horizontal distance and the horizontal velocity:

[tex]\[ t = \frac{d}{v_x} \][/tex]

where [tex]\( t \)[/tex] is the time of flight, [tex]\( d \)[/tex] is the horizontal distance (36.0 m) and is the horizontal velocity (22.2 m/s). Plugging in the values:

[tex]\[ t = \frac{36.0 \text{ m}}{22.2 \text{ m/s}} \][/tex]

[tex]\[ t = 1.6216 \text{ s} \][/tex]

Now, we use the time of flight to find the height of the building using the vertical motion equation:

[tex]\[ h = \frac{1}{2} g t^2 \][/tex]

where [tex]\( h \)[/tex] is the height of the building, [tex]\( g \)[/tex] is the acceleration due to gravity (approximately [tex]\( 9.81 \text{ m/s}^2 \)[/tex]), and [tex]\( t \)[/tex] is the time of flight we just calculated. Plugging in the values:

[tex]\[ h = \frac{1}{2} \times 9.81 \text{ m/s}^2 \times (1.6216 \text{ s})^2 \][/tex]

[tex]\[ h = \frac{1}{2} \times 9.81 \text{ m/s}^2 \times 2.6297 \text{ s}^2 \][/tex]

[tex]\[ h = 4.905 \text{ m/s}^2 \times 2.6297 \text{ s}^2 \][/tex]

[tex]\[ h = 12.898 \text{ m} \][/tex]

The auditory cortex is located in temporal lobe of the brain.

The  auditory cortex is the part of the temporal lobe that processes hear-able data in people and numerous different vertebrates.

It is a piece of the  auditory framework, carrying out fundamental and higher roles in hearing. For example, potential relations to language switching.

The auditory cortex is situated on the predominant transient gyrus in the fleeting curve and gets highlight point input from the ventral division of the average geniculate complex.  Consequently, it contains an exact tonotopic map.

It is found generally at the upper sides of the fleeting curves in people, bending down and onto the average surface, on the prevalent transient plane, inside the sidelong sulcus and containing portions of the cross over worldly gyri, and the unrivaled worldly gyrus, including the planum polare and planum temporale.

Thus,  auditory cortex is located in temporal lobe of the brain.

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We can define density as per unit volume.

The SI unit to measure the density of solid, liquid and gas is kilogram per cubic metre (kg/m3) and in the centimetre–gram–second system of units (cgs unit) is gram per cubic centimetre (g/cm3). Gas density is very dependent of pressure and temperature whereas the density of solids and liquids is not so dependent, that is why the gas density is given at a standard temperature and pressure.

Chemists typically use g/mL or g/cm³ for liquids and solids, and g/L for gases. Differences arise due to the varying densities and volumes of these states of matter.

Chemists use different units for density based on the state of matter being measured. For liquids and solids, the density is usually expressed in grams per milliliter (g/mL) or grams per cubic centimeter (g/cm³). This is because liquids and solids generally have higher densities and smaller volumes compared to gases, making these units convenient for laboratory measurements and calculations.

For gases, the density is typically expressed in grams per liter (g/L). Gases have much lower densities and occupy larger volumes compared to liquids and solids, so g/L is more appropriate. The larger unit (liter) helps to manage the lower mass of gases, ensuring the numerical values are easy to work with.

The choice of units helps chemists maintain consistency and accuracy when measuring and comparing densities across different substances and states of matter. Using units that reflect the typical scales of measurement for each state ensures that the values are neither too large nor too small, facilitating easier interpretation and communication of data.

Answer:

D. Do you think we should ignore our constitutional rights and let the government take citizens' guns away?

Explanation:

A question wording biased is what happens when the question states directly a point of biew and suggests the interviewed a certain answer that is clear once you´ve heard the question, in this case it is obvious that the question is against the ban on guns, because it is already judging any decision that the congress could make on it and suggesting a point of view to the interviewed.

Answer:

b.a deserted neighborhood street

Explanation:

ap3x

The setting of the story in "the pedestrian" is a large metropolis. The correct option is D.

"The Pedestrian" is a short story by Ray Bradbury that was first published in 1951. The story is set in the future in the year 2053 in a large metropolis where people spend their evenings indoors watching television or communicating through advanced technology.

The main character, Leonard Mead, is an exception to this pattern. He enjoys taking long walks through the city streets at night, something that is seen as strange and suspicious by the society around him. One evening, he is stopped by a police car and questioned about his activities. The police officers are suspicious of him and don't understand why he would want to walk when he could stay inside and be entertained.

After a brief conversation, the police let Leonard go and he continues his walk. However, he soon realizes that he is the only person outside in the entire city. He reflects on the society he lives in and how it has become so obsessed with technology that people have lost the ability to appreciate the simple pleasures of life. As he continues his walk, he is suddenly surrounded by a bright light and taken away by the police, who see his activities as a threat to society.

The story is a critique of the growing influence of technology and its impact on human interaction and personal freedoms. It highlights the danger of becoming too dependent on technology and losing sight of the things that truly make life worth living.

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Angular speed is  0.188 rad/s ,

Tangential speed is 18.8 ft/s ,

Time for one revolution is 33.4 s.

Given :

Ferris wheel of radius 100 ft.

The lowest point of the ride is 3 feet above ground level.

Solution :

Refer the attached diagram for better understanding.

From the diagram we know that,

[tex]\rm y = 100-(44-3)=59 \; ft[/tex]

y = 59 ft

Now applying pythagorean theorem,

[tex]x^2 + 59 ^2= 100^2[/tex]

[tex]x=\sqrt{100^2-59^2}[/tex]

[tex]\rm x = 80.7403\;ft[/tex]

Now to calculate angle [tex]\theta\\[/tex],

[tex]\rm cos\theta = \dfrac{59}{100}=0.59[/tex]

[tex]\rm \theta = 53.84^\circ=0.9397\;radians[/tex]

Now the arc length pq is given by,

[tex]\rm S =pq=0.9397\times100[/tex]

[tex]\rm S = 93.97\; ft[/tex]

Now the angular velocity is given by,

[tex]\omega = \dfrac {0.9397}{5}[/tex]

[tex]\rm \omega = 0.188\;rad/sec[/tex]

Now the tangential velocity is given by,

[tex]\rm v={100}\times{0.188}[/tex]

[tex]\rm v = 18.8\;ft/sec[/tex]

Now the time for a single revolution is given by,

[tex]\rm T = \dfrac{2\pi}{0.188}[/tex]

[tex]\rm T= 33.4\; sec[/tex].

Therefore, angular speed is  0.188 rad/sec , tangential speed is 18.8 ft/s ec and time for one revolution is 33.4 sec.

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Answer:

People who study the effects of human activities on earth land air water and living thing are Environmental scientist

The stone was originally thrown from a height of 234 feet. This solution was obtained using the physics kinematic equation for vertical motion.

This problem can be solved using the kinematic equation:

Δy = V₀t + 1/2gt²

, where:

From the statement we know: Δy = 10 ft - 90 ft = -80 ft after 2 seconds. We substitute these values and solve for the initial position, y₀. The equation becomes:

-80 = 4*2 + 1/2*(-32)*2²

. Solving gives us -80 = 8 - 64, so

y₀ = 80 + 64 + 90 = 234 ft

. Therefore, the stone was thrown from a height of 234 feet.

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Using the equations of motion under gravity, it's determined that the stone was thrown from a height of 162 feet considering it was thrown down with an initial velocity and passed specific heights in its journey.

The question involves finding the original height from which a stone was thrown, given that it was thrown down with an initial speed and passes specific points in its descent. To solve this problem, we can use the equations of motion under the influence of gravity. The formula that relates the initial velocity (u), the acceleration due to gravity (g = 32 feet/second2 downward), the time taken (t), and the displacement (s) is s = ut + (1/2)gt2.

In this instance, the stone is observed to move from 90 feet above the ground to 10 feet above the ground in 2 seconds, with an initial downward speed of 4 feet/second. The drop in height (displacement) is 80 feet (90 - 10). We can insert these values into the formula to find the initial height: Let H be the initial height, the equation becomes H - 90 = 4(2) + (1/2)(32)(22). Simplifying, we find that H - 90 = 8 + 64, which resolves to H = 162 feet.

Hence, the stone was thrown from a height of 162 feet.

The cannonball takes approximately 4.40 seconds to hit the wall and strikes it at a height of around 157.15 meters.

Let's solve this step by step:

Step 1: Calculate the time of flight

To find how long it takes for the cannonball to hit the wall, we need to consider the horizontal motion.

So, it takes approximately 4.40 seconds for the ball to hit the wall.

Step 2: Calculate the height at which the ball hits the wall

For vertical motion:

Vertical displacement (y) after time t: [tex]y = u_y \times t - 0.5 \times g \times t^2[/tex] (where g is the acceleration due to gravity, approximately 9.8 m/s²)

Therefore, the ball hits the wall at a height of approximately 157.15 meters.

The complete question is as follows:

A cannon elevated at 40 degrees is fired at a wall 300 m away on level ground. The initial speed of the cannonball is 89 m/sec.

1) how long does it take for the ball to hit the wall?

2) at what hight does the ball hit the wall?

The average velocity of a particle moving uniformly along an axis can be found using the formula v = Δx/ Δt where Δx is the change in displacement and Δt is the change in time. In this case, the initial position and time are subtracted from the final position and time to find these changes, and the answer is negative, indicating motion in the negative x-direction.

The average velocity of a particle moving uniformly along the x-axis can be determined using the formula for average velocity, which is the change in displacement divided by the change in time. In this case, the initial position of the particle is x1 = 13.4 m at time t1 = 1.72 s, and the final position is x2 = 3.13 m at time t2 = 4.6 s.

Subtract the initial position from the final position to get the change in displacement (Δx = x2 - x1), and subtract the initial time from the final time to get the change in time (Δt = t2 - t1).

A negative answer implies motion in the negative x-direction. The average velocity (v) is then given by the formula v = Δx/Δt.

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The mass of an object remains constant, in any location. As such, a person's mass on the Moon is the same as their mass on Earth. However, their weight would be approximately 1/6th of what it is on Earth, due to the Moon's lower gravity.

The mass of an object remains the same regardless of location - it is a fixed measure of the amount of matter within an object. The force of gravity does change depending on location, and as such, the weight of an object can vary. On the Moon, for example, the value of 'g' (the acceleration due to gravity) is 1.62 m/s², which is about 1/6 of the Earth's gravity. Therefore, if you weigh 60 kg on Earth, you would still possess that same mass on the Moon. However, your weight on the Moon would be much less due to the lower gravity.

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Answer: A

Explanation: