Determine the components of all forces acting on member ABCD when ? = 0. Take P = 110 lb. (Round the final answers to their nearest whole number.)
The components of all forces acting on member ABCD when ? = 0, are
A = lb ?
Bx = lb ?
By = lb ?
D = lb ?
C = lb ?

The astronaut's height, as measured from the space station, will appear contracted due to relativistic effects. Due to relativistic length contraction, the astronaut's height, as measured from the space station, appears to be approximately 3.52 meters.

According to the theory of special relativity, objects in motion relative to an observer will experience length contraction along the direction of motion. In this case, the spaceship is moving at a speed of 0.9 times the speed of light (0.9 c) relative to the space station.

The length contraction factor, denoted by γ, can be calculated using the Lorentz factor:

γ = 1 / √(1 - v²/c²)

Where v is the velocity of the spaceship and c is the speed of light. Plugging in the values, we have:

γ = 1 / √(1 - 0.9²)

γ ≈ 1.92

To determine the astronaut's height as measured from the space station, we multiply her actual height by the length contraction factor:

Height (as measured from the space station) = Actual height × γ

Height (as measured from the space station) = 1.83 m × 1.92

Height (as measured from the space station) ≈ 3.52 m

Therefore, due to relativistic length contraction, the astronaut's height, as measured from the space station, appears to be approximately 3.52 meters.

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Answer:

If the displacement of an object is proportional to the square of the time taken then the body is moving with uniformly accelerated motion as it will follow Newton's second equation of motion for a particular initial velocity, which can be given by, s=ut+21at2.

A pressure regulator must be connected to an oxygen cylinder to provide a safe working pressure typically around 50 psi (pounds per square inch) or 3.5 bar.

This pressure is commonly used for various medical applications where controlled and precise oxygen delivery is required, ensuring the safety and well-being of the patient.

It's important to note that specific pressure requirements may vary depending on the specific use case and regulations in different regions or medical facilities.

Therefore, it is advisable to consult the manufacturer's guidelines and relevant safety standards to determine the appropriate working pressure for a particular oxygen cylinder and its intended application.

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11.The time at 75° East longitude would be 1 hour and 20 minutes behind. 12.The time at 135° degrees East longitude would be 4 hours ahead. and 13. the time in Lima, Peru (15° South latitude, 75° West longitude) would also be 9:30 AM.

At 2:00 AM at 90° East longitude, the time at 75° East longitude would be 1 hour and 20 minutes behind. This is because for every 15 degrees of longitude, there is a time difference of approximately 1 hour. Since the two longitudes in question have a difference of 15 degrees, we can divide this by 15 to calculate the time difference.

If it is 8:00 PM at 15° East longitude, the time at 135° East longitude would be 4 hours ahead. Similarly, for every 15 degrees of longitude, there is an approximate time difference of 1 hour. Since the two longitudes in question have a difference of 120 degrees, we can divide this by 15 to calculate the time difference.

There is a 7-hour difference** between 105° West longitude and the Prime Meridian (0° longitude). The Prime Meridian, passing through Greenwich, England, serves as the reference point for determining time zones. As one moves westward from the Prime Meridian, each 15 degrees of longitude corresponds to a time difference of approximately 1 hour. Therefore, the time at 105° West longitude would be 7 hours behind the time at the Prime Meridian.

If it is 9:30 AM in New York (41° North latitude, 75° West longitude), the time in Lima, Peru (15° South latitude, 75° West longitude) would also be 9:30 AM. The latitude does not affect the time difference between the two locations. However, since both locations have the same longitude (75° West), they would experience the same local time. The time difference between different latitudes is primarily significant for determining time zones rather than the actual time within a specific time zone.

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Answer:

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.

Explanation:

Answer: Photosynthesis is something that a plant goes through. It takes the sunlight from the sun and turns it into oxygen, emitting it out into the atmosphere and giving us air to breathe.

Explanation:

The action-oriented objective in a SMART goal setting system is option D) Increase my distance by one-half mile every other week.

This objective is specific, measurable, achievable, relevant, and time-bound. It is specific because it defines a clear action to be taken (increasing distance), measurable because it includes a specific metric (one-half mile), achievable because it is realistic to increase distance gradually, relevant because it aligns with the goal of completing a marathon, and time-bound because it specifies a regular interval (every other week) for progress tracking. Options A, B, and C are also specific and measurable but lack the regular interval and gradual progression aspects of a SMART goal.

In a SMART goal setting system, an action-oriented objective is one that focuses on specific actions to achieve the desired outcome. Among the given options, B) Run on the trail 4 times a week is the most action-oriented objective. This objective clearly outlines the action (running on the trail) and the frequency (4 times a week), making it easier to track progress and achieve the goal. The other options focus more on outcomes or results, which are important aspects of a goal, but they do not explicitly state the specific actions needed to reach those outcomes.

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Answer:

waking up,eat,sleep

Explanation:

notice how i didn't say math :)

Answer:

325.76 revolutions

Explanation:

The tire radius is diameter/2: 42/2 = 21

And now we can discover the lenght of the tire circumference. The lenght of a circumference is given by 2×radius×π, and let's consider π=3.14, and let's use the radius in meter (21 cm = 0.21 m):

2•0.21•3.14 = 1.32 m of lenght

Now, you divide the distance the car moved by the lenght of the tire circumference and you will find how many revolutions the tire makes:

420/1.32 = 325.76

0.08 gram mass of magnesium oxide will be formed.

Mass is an intrinsic property in the mass of a body. It was the  traditionally believed to the  be related to the quantity of matters in the  physical body, until it is  discovery of the atom and  particle in physics.

Mass is quantitative measure of inertia a fundamental quantity of all matters.

2Mg + O 2→2MgO

Molar mass of Mg =24 g

Molar mass of MgO =40 g

No. of moles of O2=6.022×10^20/6.022×10^23

=0.001 mole of O2

No. of moles of Mg=0.486/24

=0.02 moles  of Mg

As moles of O 2

​ are less than 0.01, O 2

 is limiting reagent and it is  0.002 moles of MgO is formed.

⇒0.002×40=0.08 g of MgO

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Answer:

10N

Explanation:

The formula for calculating the resultant is expressed as;

R = √F1²+F2²

F1 and F2 are the forces

Given

F1 = 6.0N

F2 = 8.0N

R = √6²+8²

R = √36+64

R = √100

R = 10.0N

Hence the magnitude of the net force is 10N

At the summit of the mountain, the mass is 60.18 kg, the weight is 600 N, and the mass is unaltered.

Let the mass on earth be m.

As we know:

Now, calculate as follows:

Therefore, at the summit of the mountain, the mass is 60.18 kg, the weight is 600 N, and the mass is unaltered.

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​

Answer:

I would say increasing the balls kinetic energy

Explanation:

Because she is moving the ball and increasing kinetic energy

Christines Velocity = 30 cm / 0.8875 s = 33.8 cm/s.

Christine's velocity is the rate at which she moves through space. It is a measure of her speed and direction and is typically measured in meters per second. Velocity is a vector quantity, meaning it has both magnitude (or numerical value) and direction. Christine's velocity at any given moment is determined by her direction and speed of motion, and it can change if her speed or direction changes. Velocity can also be affected by external forces, such as gravity, friction, or air resistance. The magnitude of velocity is always positive, since it is a measure of speed and direction. If Christine's velocity is zero, then she is not moving at all.

2. Daemons Velocity = 30 cm / 0.8875 s = 33.8 cm/s

3. Christine's Momentum = 60 kg * 33.8 cm/s = 2,028 kg·cm/s

4. Daemons Momentum = 66.5 kg * 33.8 cm/s = 2,237.7 kg·cm/s

5. Total Momentum = (60 kg + 66.5 kg + 22 kg + 22 kg) * 33.8 cm/s = 4,322.7 kg·cm/s

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The object will eventually experience a large vertical acceleration since the vertical velocity increases as the object moves downwards.

The horizontal motion of a projectile is the motion of the projectile along a horizontal path.

The horizontal distance of a projectile is not affected by gravity and hence the horizontal speed of a projectile remains constant. That is the initial horizontal velocity is equal to the final horizontal velocity of the projectile.

However, the during the vertical motion an object, the vertical velocity decreases as the object moves upwards and eventual becomes zero when the object reaches the maximum height.

As the object begins to move downwards the vertical velocity increase and eventually become maximum before the object hits the ground.

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Number 1 and A are correct, but B is not correct

B ---> Distance = 1/2*(Velocity)*(Time)

Distance = 1/2(5s)*(-12m/s)

Distance = 5(s)*(-6m/s)

Distance = -30m

The spring constants of the string and nylon thread are: higher compared to the spring, as they demonstrate greater resistance to stretching under the same applied force.

When a moderate force is applied, both string and nylon thread stretch but only a small amount, whereas a spring stretches much further. To compare their spring constants, we need to understand Hooke's Law, which states that the force applied is proportional to the displacement of the object (F = kx). Here, k is the spring constant and x is the displacement.

A higher spring constant (k) means that the object is more resistant to stretching, while a lower spring constant indicates that the object is more easily stretched. In this case, the string and nylon thread have higher spring constants compared to the spring since they stretch less under the same force. The spring, which stretches much further, has a lower spring constant.

In conclusion, the spring constants of the string and nylon thread are higher compared to the spring, as they demonstrate greater resistance to stretching under the same applied force. This is evident in the smaller displacements observed when pulling the string and thread compared to the more significant stretching of the spring.

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Answer:

A hydrometer is an instrument used to determine specific gravity

Answer:

it is used determine specific gravity

Explanation:

and u can see them in use by measuring proof of moonshine

1. The part that shows the body is accelerating is the first 2 hours (ABE). The acceleration is 20 Km/h²

2. The part that shows the body is coming to rest the last 2 hours (CDF)

3. The distance travelled in the first 2 hours is 40 Km

Acceleration is defined as the rate of change of velocity which time. It is expressed as

a = (v – u) / t

Where

From the diagram (ABE), we can see that the body starts from rest and attain a final velocity (40 Km/h) within the first 2 hours. This clearly indicates that the body is accelerating.

The acceleration can be obtained as followed:

a = (v – u) / t

a = (40 – 0) / 2

a = 20 Km/h²

From the diagram (CDF), we can see that the object velocity changes from 40 to 0 within the last 2 hours. This clearly indicates that the object caming to rest.

v² = u² + 2as

v² = 2as

s = v² / 2a

s = 40² / (2 × 20)

s = 40 Km

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Answer:

a) ray horizontal and ray leaves his feet

b) The normal line respect to which the angles are measured,

c) The angle x is the reflected angle

d) virtual image,  right image

Explanation:

a) To complete the rays, you must draw a horizontal ray at the height of the man's head, this ray touches the mirror perpendicularly, therefore it bounces in the same direction.

The other ray leaves his feet and touches the mirror at one point, it is reflected with the same angle, by the law of reflection and reaches the eyes of man, the brain creates an extension of this ray and at the point of the floor creates the image point.

b) The normal line is a line perpendicular to the surface with respect to which the angles are measured,

c) The angle x is the reflected angle, which is equal to the incident angle according to the law of reflection

d) The image is formed by the prolongation of the rays of light, therefore it is a virtual image and as it has the same direction of the man it is a right image

In the absence of friction, a force applied to a body for a given amount of time, changes the momentum of the body

The average force per unit area exerted on the passenger with no seatbelt 5,400,000 N/m²

The average force per unit area for the passenger with seat belt 18,750 N/m²

The known parameters are;

The velocity of the car, v₀ = 15 m/s

The time it takes the passenger not wearing seat belt to strike the windshield, \(t_{ns}\) = 0.03 s

Area of contact between the head and the windshield, \(A_{ns}\) = 5 × 10⁻⁴ m²

The mass of the head, \(m_{h}\) = 5.4 kg

Time taken for the passenger wearing seat belt to come to rest, \(t_s\) = 0.50 s

The mass of the passenger wearing seatbelt, \(m_s\) = 75 kg

Area of the seat belt in contact with the passenger, \(A_s\) = 0.12 m²

Required:

To find the average force per unit area exerted on the two passengers

Solution:

According to Newton's second law on motion, force is equal to the product of mass and acceleration

\(Acceleration, \overline a = \dfrac{Change \ in \ velocity}{Elapsed \ time} = \dfrac{v - v_0}{t}\)

Therefore, the acceleration, force and average force per unit area of the passenger with no seat belt;

\(Acceleration, \overline a_{ns} = \dfrac{0 - 15 \, m/s}{0.03 \, s} = 500 \, m/s^2\)

\(F_{ns}\) = \(m_{h}\) × \(\overline a_{ns}\)

Which gives;

\(F_{ns}\) = 5.4 kg × 500 m/s² = 2,700 N

Force per unit area = Force/Area

\(P_{ns} = \dfrac{2,700 \, N}{5 \times 10 ^{-4} \ m^2} = 5,400,000 \ N/m^2\)

The average force per unit area exerted on the passenger with no seatbelt, \(P_{ns}\) = 5,400,000 N/m²

\(Acceleration, \overline a_{s} = \dfrac{0 - 15 \, m/s}{0.5 \, s} = 30 \, m/s^2\)

\(F_{s}\) = \(m_{b}\) × \(\overline a_{s}\)

Which gives;

\(F_{s}\) = 75 kg × 30 m/s² = 2,250 N

Force per unit area = Force/Area

The average force per unit area, for the passenger with seat belt is therefore;

\(P_{s} = \dfrac{2,250\, N}{0.12 \ m^2} = 18, 750\ N/m^2\)

The average force per unit area for the passenger with seat belt, \(P_s\) = 18,750 N/m²

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Kieran had a greater average speed than Jevon. Let us go into more detail in the explanation below. To compare the average speeds of Kieran and Jevon, we need to find out the speed of each person.

We can use the formula speed = distance/time. Kieran ran 8 laps in 18 minutes, which means he ran 8/18 = 0.44 laps per minute. To find out Kieran's speed, we need to multiply this by the length of one lap. If we assume that the length of one lap is 400 meters, then Kieran's speed is:0.44 laps per minute × 400 meters per lap = 176 meters per minute Jevon ran 6 laps of the track, but we don't know how long it took him.

Therefore, we can't calculate his speed directly. However, we can still compare his speed to Kieran's by using ratios. If we assume that Jevon ran the same length of track as Kieran, then we can write the following equation: Kieran's speed/Jevon's speed = Jevon's time/Kieran's time.

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The tangential speed of a point on the Ferris wheel is approximately 2.01 m/s.  the magnitude of the centripetal acceleration of a point on the Ferris wheel is approximately 0.106 m/s².

The tangential speed of a point on the Ferris wheel is given by the formula:

v = (2πr) / T

where v is the tangential speed, r is the radius of the Ferris wheel (half the diameter), and T is the time taken to complete one revolution.

In this case, the diameter of the Ferris wheel is 76 m, so its radius is 38 m. It completes one revolution every 20 min, so the time taken is T = 20 min = 1200 s. Substituting these values in the formula, we get:

v = (2π × 38 m) / 1200 s

≈ 2.01 m/s

The centripetal acceleration of a point on the Ferris wheel is given by the formula:

a = v² / r

where a is the magnitude of the centripetal acceleration, v is the tangential speed, and r is the radius of the Ferris wheel.

In this case, we have already calculated the tangential speed to be approximately 2.01 m/s, and the radius of the Ferris wheel is 38 m. Substituting these values in the formula, we get:

a = (2.01 m/s)² / 38 m

≈ 0.106 m/s²

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Answer: 2934.75 Joules

Explanation:

Potential energy can be defined as energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

P.E = mgh

Where P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per second square.

h represents the height measured in meters.

Given the following data;

Weight =645

Height = 4.55

P.E = mgh

But we know that weight = mg = 645N

Substituting into the equation, we have;

P.E = 645 • 4.55

P.E = 2934.75J

Potential energy, P.E = 2934.75 Joules.

Answer:

I dont know but ask a tutor

Explanation:

MOnkey Srry

When a light source is placed exactly at the focal point of a concave mirror, the light rays emitted from the source become parallel after reflecting off the mirror.

This phenomenon is known as collimation. The light rays converge towards the focal point upon reflection but, since the source is already at the focal point, the reflected rays become parallel to the mirror's principal axis.

This creates a beam of collimated light that can travel long distances without significant divergence. Precise positioning at the focal point is necessary for this effect to occur.

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a. Therefore, the magnitude of the impulse on the hand is 7.0 Ns.

b. Therefore, the magnitude of the average force on the hand from the target is 1400 N.

(a) The impulse on the hand is given by the change in momentum of the hand during the collision. Since the hand comes to a stop, its final momentum is zero. Therefore, the impulse is equal in magnitude to the initial momentum of the hand:

p = mv = (0.70 kg)(10 m/s) = 7.0 Ns

Therefore, the magnitude of the impulse on the hand is 7.0 Ns.

(b) The average force on the hand during the collision can be found by dividing the impulse by the duration of the collision:

F = Δp/Δt

here Δp is the change in momentum and Δt is the duration of the collision. The change in momentum is the same as the impulse, which we found in part (a):

Δp = 7.0 Ns

The duration of the collision is given as 5.0 ms, which we need to convert to seconds:

Δt = 5.0 x \(10^{-3} s\)

Substituting these values into the formula for average force, we get:

F = (7.0 Ns)/(5.0 x \(10^{-3} s\) ) = 1400 N

Therefore, the magnitude of the average force on the hand from the target is 1400 N.

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Answer:

Fossil fuels are of great importance because they can be burned (oxidized to carbon dioxide and water), producing significant amounts of energy per unit mass. The use of coal as a fuel predates recorded history. Coal was used to run furnaces for the smelting of metal ore.

The mathematical relationship that relates the combined force (F1), mass (m), and acceleration (a) is Newton's second law of motion. This law states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. The formula for this relationship is:
F1 = m * a

In this equation, F1 represents the combined force acting on the object, m represents the mass of the object, and a represents the acceleration of the object. This law is fundamental in classical mechanics and is used to describe the motion of objects under various forces.

When a force is applied to an object, it causes the object to accelerate. The larger the mass of the object, the more force is required to achieve the same acceleration. Similarly, the greater the force applied, the more the object will accelerate. This relationship helps us understand how forces and masses affect the motion of objects in the physical world.

In conclusion, Newton's second law of motion establishes a mathematical relationship between the combined force, mass, and acceleration of an object. By using the formula F1 = m * a, you can calculate the force acting on an object or the resulting acceleration when you know the mass and the applied force. This law plays a crucial role in understanding and predicting the motion of objects in various scenarios.

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