Problem 8: A 55-kg skydiver jumps out of an airplane and falls 450 m, reaching a maximum speed of 68 m/s before opening her parachute. Randomized Variables m = 55 kg h = 450 m V = 68 m/s 50% Part(a) How much work, in joules, did air resistance do on the skydiver before she opened her parachute? W Grade Summary Deductions Potendal 1005 11 ET 4 5 6 sino coso tano cotano) asino acos atan) acotan sinho) cosho tanho) cotanho O Degrees Radians Submissions Attempts remaining per attempo detailed view + 0 Submit Hint I give up! Hits 1 dedection perint. Hints Feedback dedition per feedback 50% Part (b) Assuming the force of air resistance is constant, what is the magnitude of the force of air resistance, in newtons, on her?

Answer:

y = 33.93 10⁵ m

Explanation:

This is an interference exercise, for the contributory interference is described by the expression

           d sin θ = m λ

let's use trigonometry for the angle

           tan θ = y / L

how the angles are small

          tan θ = sin θ / cos tea = sin θ

we substitute

         sin θ = y / L

        d y / L = m λ

         y = m λ L / d

the light fulfills the relation of the waves

       c = λ f

       λ = c / f

       λ = 3 10⁸ /375

       λ = 8 10⁵ m

first order m = 1

let's calculate

        y = 1  8 10⁵  4030 10-9 / 950 10-9

        y = 33.93 10⁵ m

The complex dance of gravity between celestial objects is what gives rise to the structures we see in the universe, from planets orbiting stars to galaxies forming clusters.

Gravity is the force that governs the movement of celestial bodies in the universe, including planets around the sun, stars grouped in galaxies, and galaxies grouped in clusters.

For example, the gravity of the sun keeps the planets in orbit around it. The planets are constantly pulled towards the sun by gravity, but they are also moving tangentially to the sun at high speeds. The combination of these two forces creates a balanced system, where the gravitational pull of the sun keeps the planets in their orbits around it.

Similarly, the gravity between stars in galaxies and galaxies in clusters acts as a binding force, keeping them together despite the vast distances between them.

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The mass of the interstellar cloud is the primary factor that causes its gravitational contraction. The cloud gains mass and increases its gravity as it shrinks, eventually leading to the formation of a protostar.The correct option is a.

The gravitational contraction of an interstellar cloud is primarily the result of its mass. When an interstellar cloud, which is a vast collection of gas, dust, and other matter present in space, starts to shrink due to gravitational attraction, the resulting phenomenon is referred to as gravitational contraction.

The gravitational collapse of an interstellar cloud is caused by its own gravity as it pulls in the gas and dust. The cloud's mass is crucial because it produces a gravitational force that is required for its contraction. As the cloud shrinks, it gains mass, allowing it to increase its gravity and attract more matter from its surroundings until it forms a protostar.

:Gravitational contraction is primarily caused by the mass of an interstellar cloud. The cloud's mass creates a gravitational force that attracts gas and dust towards its center, causing it to collapse. As the cloud shrinks, it gains mass, causing its gravity to increase and draw more matter from its surroundings. This process continues until a protostar forms. Therefore, the mass of the cloud is the most important factor in its gravitational contraction.The correct option is b.

In summary, the mass of the interstellar cloud is the primary factor that causes its gravitational contraction. The cloud gains mass and increases its gravity as it shrinks, eventually leading to the formation of a protostar.

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Answer:

The centripetal acceleration of the stone is 5 m/s²

Explanation:

The length of the string to which the stone is attached, r = 1 m

The speed with which the string is rotated, v = 5 m/s

The centripetal acceleration, \(a_c\), is given as follows;

\(a_c = \dfrac{v^2}{r}\)

Therefore, the centripetal acceleration of the stone found as follows;

\(a_c = \dfrac{(5 \ m/s)^2}{1 \ m} = 5 \ m/s^2\)

The centripetal acceleration of the stone, \(a_c\) = 5 m/s².

The minimum velocity of the Salmon jumping at the given angle is 12.3 m/s.

The given parameters;

The time of motion to fall from 0.432 m is calculated as;

\(h = v_0_y + \frac{1}{2} gt^2\\\\0.432 = 0 + (0.5\times 9.8)t^2\\\\0.432 = 4.9t^2\\\\t^2 = \frac{0.432}{4.9} \\\\t^2 = 0.088\\\\t = \sqrt{0.088} \\\\t = 0.3 \ s\)

The minimum velocity of the Salmon jumping at the given angle is calculated as;

\(X = v_0_x t\\\\3.17 = (v_0\times cos(30.8)) \times 0.3\\\\10.567 = v_0\times cos(30.8)\\\\v_0 = \frac{10.567}{cos(30.8)} \\\\v_0 = 12.3 \ m/s\)

Thus, the minimum velocity of the Salmon jumping at the given angle is 12.3 m/s.

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Answer:

its electrical energy input converted into heat input energy

True

The sun is considered a low mass star in comparison to other stars in the universe. Although it is more massive than most of its neighboring stars, it still falls within the low mass category.

The classification of stars is based on their mass, and low mass stars are those that have a mass less than or equal to 2 solar masses. The sun's mass is approximately 1.989 x 10^30 kg, which is less than 2 solar masses. Therefore, it is classified as a low mass star.

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Using Ohm's law, we know that the voltage drop across the internal resistance is V=IR, where R is the internal resistance. So we have V=0.75R. Plugging this into the equation above, we get 1+1.25+0.75R=2.25, which simplifies to R=1 ohm.
Therefore, the emf of the cell is 2.25V and the internal resistance is 1 ohm.

In order to find the emf and internal resistance of the cell, we can use Ohm's law and Kirchhoff's laws. Kirchhoff's laws state that the sum of the voltages in a closed loop must be equal to zero, and the sum of the currents entering and leaving a node must be equal.

First, let's find the voltage drop across each resistor using Ohm's law. For the 2-ohm resistor, V=IR=0.5*2=1V. For the 5-ohm resistor, V=IR=0.25*5=1.25V.

Next, let's apply Kirchhoff's laws. The sum of the voltages in the loop is equal to the emf minus the voltage drops across the resistors. So we have E-1-1.25=0, which simplifies to E=2.25V.

To find the internal resistance, we can use the equation V=IR+E, where V is the voltage drop across the internal resistance. We know that the current passing through the circuit is the sum of the currents passing through each resistor, so I=0.5+0.25=0.75A.

Using Ohm's law, we know that the voltage drop across the internal resistance is V=IR, where R is the internal resistance. So we have V=0.75R. Plugging this into the equation above, we get 1+1.25+0.75R=2.25, which simplifies to R=1 ohm.

Therefore, the emf of the cell is 2.25V and the internal resistance is 1 ohm.

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Potential energy of the 2-charge system: According to the question, we have two point charges of values +3.4 µC and +6.6 µC separated by 0.20 m. The potential energy of the two-point charge system is 820.41 J.

The formula for calculating the potential energy of the two-point charge system is given by;

U = (kq1q2)/d,

Where; U = potential energy of the system q1 = value of the first point charge

q2 = value of the second point charge,

k = Coulomb's constant = 8.99 × 10^9 Nm^2/C^2

d = separation distance between the two charges

Plugging in the values, we get;

U = [(8.99 × 10^9 Nm^2/C^2)(3.4 µC)(6.6 µC)]/(0.20 m)

U = 820.41 J (Joules)

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According to the space environment tracking website SpaceWeather, scientists have accounted for approximately 9,000 potentially hazardous near-Earth or Earth-crossing asteroids. This number is subject to change as new discoveries are made and existing data is updated.

As of September 2021, the Center for Near Earth Object Studies (CNEOS) at NASA had identified and tracked more than 25,000 near-Earth objects (NEOs), including over 9,000 classified as potentially hazardous asteroids (PHAs). It's important to note that not all PHAs are guaranteed to impact the Earth, and scientists continuously monitor these objects to refine their orbital calculations and assess potential impact risks.

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Answer:

The Sun derives all its energy from a fusion cycle. In that process, tiny hydrogen molecules combine into a continuous proton-proton chain to create larger helium nuclei. The above figure illustrates the fusion of hydrogen into helium.

Explanation:

Hope this helps.

Answer:

nuclear fusion

Explanation:

In this process, small hydrogen molecules fuse together to form bigger helium nuclei in a continuous proton-proton chain.

1. Scrambled Eggs and Avocado Toast:

Carbs: 24g

Protein: 22g

Fat: 27g

Portion Size: 2 scrambled eggs, 1 slice of whole grain bread, 1/4 avocado

How You Might Feel: The healthy fats from the avocado can help you feel fuller for longer, and the protein from the eggs can help to stabilize blood sugar levels and reduce cravings.

2. Greek Yogurt and Berry Parfait:

Carbs: 37g

Protein: 17g

Fat: 5g

Portion Size: 1 cup of plain Greek yogurt, 1/2 cup of mixed berries, 1/4 cup of granola

How You Might Feel: The Greek yogurt provides a good source of protein, and the mixed berries are a good source of fiber and antioxidants. The granola adds some healthy fats and complex carbohydrates for sustained energy throughout the morning.

3. Whole Wheat Pancakes with Peanut Butter and Banana:

Carbs: 55g

Protein: 17g

Fat: 18g

Portion Size: 2 whole wheat pancakes, 1 tbsp of peanut butter, 1 banana

How You Might Feel: You might feel satisfied and energized after eating this breakfast, but it is higher in calories and carbohydrates than the other two options.

What are the healthy fats?

Healthy fats include monounsaturated and polyunsaturated fats such as those found in nuts, seeds, fatty fish, avocado, and olive oil. These fats can help improve cholesterol levels, lower inflammation, and reduce the risk of heart disease.

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Answer:

161,000 cm

Explanation:

1 mi × (1.61 km/mi) × (1000 m/km) × (100 cm/m) = 161,000 cm

Answer:

La potencia o consumo en watt de una ampolleta conectada a una red de energía eléctrica doméstica monofásica de 220 volt, si la corriente que circula por el circuito de la ampolleta es de 0.45 ampere, es 99 Watts.

Explanation:

Potencia es la velocidad o rapidez con la que se consume la energía. Siendo la energía la capacidad que tiene un mecanismo o dispositivo eléctrico cualquiera para realizar un trabajo, también se puede definir potencia como la energía desarrollada o consumida en una unidad de tiempo. Su unidad de medida es el Watt.

La ley de Watt establece que la potencia eléctrica P suministrada por un elemento de circuito, es directamente proporcional al producto entre la tensión de la alimentación V del circuito y la intensidad de corriente I que circula por él.  

Matemáticamente, la ley de Watt se expresa:

P = V.I

donde V es medida en Volt e I es medida en Ampere.

En este caso:

Reemplazando:

P= 220 volt* 0.45 ampere

P= 99 Watts

La potencia o consumo en watt de una ampolleta conectada a una red de energía eléctrica doméstica monofásica de 220 volt, si la corriente que circula por el circuito de la ampolleta es de 0.45 ampere, es 99 Watts.

conducting this experiment, you will be able to observe how changes in capacitance affect plate charge, stored energy, and voltage in a disconnected, but charged, capacitor.

To design an experiment to determine what happens to the plate charge, stored energy, and voltage when the capacitance of a disconnected (but charged) capacitor is changed, you can follow these steps:

1. Set up the experiment by connecting a charged capacitor to a power supply and a voltmeter.

2. Measure and record the initial voltage across the capacitor using the voltmeter.

3. Disconnect the capacitor from the power supply.

4. Change the capacitance of the capacitor by adding or removing capacitors in parallel or series.

5. Measure and record the new voltage across the capacitor using the voltmeter.

6. Calculate the change in voltage by subtracting the initial voltage from the new voltage.

7. Use the formula Q = CV to calculate the plate charge, where Q is the charge, C is the capacitance, and V is the voltage.

8. Calculate the change in plate charge by subtracting the initial plate charge from the new plate charge.

9. Calculate the stored energy using the formula E = 0.5 * CV^2, where E is the stored energy.

10. Calculate the change in stored energy by subtracting the initial stored energy from the new stored energy.

By conducting this experiment, you will be able to observe how changes in capacitance affect plate charge, stored energy, and voltage in a disconnected, but charged, capacitor.

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Initial launch speed of the cars are in order as  Vcar 1 = Vcar 2< Vcar 3

Speed (often abbreviated as "s") is a scalar variable that describes how much an object's location changes over time or how much it changes per unit of time. The average speed of an item in a period of time is the distance traveled by the object divided by the duration of the period.

Time divided by distance are the speed-related metrics.. The meter per second (m/s) is the SI unit of speed, while the kilometer per hour (kph) is the most often used unit of speed in daily life.

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The information which would be considered in deciding what should be done in restoring everglades is the cost, terrain and environmental effects.

This is referred to a natural region of tropical wetlands which can be found in the southern region of the U.S. state of Florida. It is home to a lot of organisms ranging from plants to animals which ensures that they survive the various conditions due to the availability of nutrients etc.

The information which would be considered in deciding what should be done in restoring everglades is the cost as a cheap reliable method is preferable and also the effect on the environment as a whole.

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Answer:

P-waves and S-waves are types of seismic waves that are generated during an earthquake. Seismic waves are waves of energy that travel through the Earth's interior and can be detected by seismometers.

P-waves, also known as primary waves or pressure waves, are compressional waves that move through the Earth by alternately squeezing and stretching the material through which they pass. They can travel through solid, liquid, and gaseous materials, and are the fastest type of seismic wave. P-waves are often the first waves to be detected during an earthquake, and are used to locate the epicenter of the earthquake.

S-waves, also known as secondary waves or shear waves, are transverse waves that move through the Earth by causing the material through which they pass to vibrate at right angles to the direction of the wave. S-waves can only travel through solid materials, and are slower than P-waves. They are used to determine the depth and intensity of an earthquake, as well as the composition and structure of the Earth's interior.

One way to differentiate between P-waves and S-waves is by the way they move through the Earth. P-waves move in the same direction as the wave, while S-waves move at right angles to the direction of the wave. Another way to differentiate between the two types of waves is by their frequency and wavelength. P-waves have a higher frequency and shorter wavelength than S-waves.

Explanation:

The initial potential energy is 2 346 J, the final potential energy is –2 346 J, and the change in potential energy as the skier goes from point A to point C in the figure is –4 692 J.

(a) The gravitational potential energy (PE) of this system when the skier is at point A and then at point B is as follows;

Using PE = mgh;

PEi = mgh

= 53.0 kg × 9.8 m/s² × 9.0 m

= 4 872 J (3 sf)

at point A,

PEf = mgh

= 53.0 kg × 9.8 m/s² × 3.0 m

= 1 573 J (3 sf)

at point B,

PE = PEi – PEf

= 4 872 J – 1 573 J

= 3 299 J (3 sf)

The change in potential energy of the skier-Earth system as the skier goes from point A to point B is 3 299 J.

(b) When the zero-level is selected at point A, then;

PEi = 0PE

f = mgh

= 53.0 kg × 9.8 m/s² × –6.0 m

= –3 299 J (3 sf)

PE = PEi – PEf

= 0 – (–3 299 J)

= 3 299 J (3 sf)

(c) If the zero-level is 2.00 m higher than point A;

PEi = mgh

= 53.0 kg × 9.8 m/s² × 2.00 m

= 1 039 J (3 sf)PE

f = mgh

= 53.0 kg × 9.8 m/s² × –7.00 m

= –4 333 J (3 sf)

PE = PEi – PEf

= 1 039 J – (–4 333 J)

= 5 372 J (3 sf)

Therefore,

PEi = 1 039 J (3 sf),

PEf = –4 333 J (3 sf),

the change in potential energy is 5 372 J (3 sf).

(d) With the zero level for the gravitational potential energy selected to be midway down the slope, 4.50 m above point A;The initial potential energy,

PEi = mgh

= 53.0 kg × 9.8 m/s² × 4.5 m

= 2 346 J (3 sf)

The final potential energy,

PEf = mgh

= 53.0 kg × 9.8 m/s² × –4.5 m

= –2 346 J (3 sf)

The change in potential energy,

PE = PEf - PEi

= –2 346 J – 2 346 J

= –4 692 J (3 sf)

Therefore, the initial potential energy is 2 346 J, the final potential energy is –2 346 J, and the change in potential energy as the skier goes from point A to point C in the figure is –4 692 J.

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Answer:

a) given that mass=0.6kg,distance of stretching from equilibrium position x=0.9m from new ton's second law,F=ma where a is acceleration of the body.Therefore,force on the spring -mass syste

Explanation:

hope it helps

The answer is not given in the options, however it can be found to be 1.36 seconds. The speed of sound in water is faster than the speed of sound in air. In water, sound travels at a speed of 1500 m/s, while in air, sound travels at a speed of 340 m/s.

The speed of sound in water is faster than the speed of sound in air. In water, sound travels at a speed of 1500 m/s, while in air, sound travels at a speed of 340 m/s. The question asks what will be the difference in time between the time Patrick hears the sound underwater and Raul hears the sound through the air. To answer this, we need to use the formula for the speed of sound in air. We can use the formula:

Speed = Distance/Time

To find the time, we can rearrange the formula to:

Time = Distance/Speed

In this case, the distance is the same for both Patrick and Raul because they are both hearing the same sound from the boat. So, we can use the same distance for both calculations. The distance is 600 m. To find the time it takes for Patrick to hear the sound, we need to use the speed of sound in water. Time = Distance/Speed = 600/1500 = 0.4 s

To find the time it takes for Raul to hear the sound, we need to use the speed of sound in air. Time = Distance/Speed = 600/340 = 1.76 s

The difference in time between the time Patrick hears the sound underwater and Raul hears the sound through the air is the time it takes for sound to travel through the air minus the time it takes for sound to travel through the water. So: Difference in time = 1.76 - 0.4 = 1.36 s

Therefore, the answer is not given in the options, however it can be found to be 1.36 seconds.

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The answer is above but I don't know if it's correct.

Answer:

16 km

Explanation:

Drawing a right triangle to model the problem helps. I started by drawing the lines of the triangle to model the hiker's journey- a vertical straight line for 11 km north and then a horizontal line connected to the top of it for 11 km east; I then drew the hypothenuse to connect the two lines.

The hypothenuse is what we have to solve for, so we will use the Pythagorean Theorem, a^2 + b^2 = c^2. Since both distances are 11 km both a and b in the equation are 11.

11^2 + 11^2 = c^2

121 + 121 = c^2

242 = c^2

c = 15.56

Rounding the answer makes it 16 km for the hiker's magnitude of displacement.

The cleavage properties of mica result from the weak bonds between flat layers. Mica is a mineral that belongs to the silicate group and is characterized by its excellent cleavage in one direction, resulting in thin, flat sheets.

This cleavage is due to the weak chemical bonds between the mineral's layers, which allows the layers to easily slide past each other along a plane of weakness.

The strength of the cleavage and the thin, flat nature of the resulting sheets make mica a useful material in a variety of applications, including electronics, insulation, and cosmetics. Hardness, a graduated cylinder and a balance, and the color of the powdered form of the mineral are not directly related to mica's cleavage properties.

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El factor mas importante para el exceso de peso es un  exceso de energía creada por una alimentación excesiva

El peso de un cuerpo es definido por la relación entre la energía requerida para los procesos vitales del cuerpo, sus actividades físicas diarias y la energía suministra en forma de alimentos.

Cuando estos dos parámetros están en balance el peso es estable. Cuando la cantidad de alimentos aumenta o el valor energético de los mismo aumenta se tiene un exceso de energía que el cuerpo almacena en forma de grasa corporal, este el el factor mas importante para el exceso de peso.

En conclusión el factor mas importante para el exceso de peso es un  exceso de energía por una alimentación excesiva

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First, find the weight of the object.

W = m g = 900 x 9.8 = 8,820 N

T2x = -t2 cos 20

t1 x = t1cos 40

mgx= 0

T2y= t2 sin 20

t1y= t1 sin 40

mgy= - mg

X and y components of resultant (R)

Rx = t1x -t2x + mgx

Rx= -t2 cos 20 + t1cos 40 (3)

Ry = t2 sin 20 + t1 sin 40 - mg(2)

Rx, and Ry = 0

0 = -t2 cos 20 + t1cos 40 (3)

0= t2 sin 20 + t1 sin 40 - mg (4)

Solve (3)

0 = -t2 cos 20 + t1cos 40

t2 cos 20 = t1 cos 40

t2 = t1 cos40/cos20

t2 = 0.815 t1

Substitute t2 in 4

0 = t2 sin 20 + t1 sin 40 - mg

0 = (0.815 t1) sin 20 + t1 sin 40 - 8,820

0= t1 ( 0.815 sin 20 + sin 40 ) -8820

0 = 0.921 t1 -8820

8820 = .921 t1

t1 = 8820/0.921

t1= 9570.261N (option D)

The time it takes you to slow to 5 m/s will be 5 seconds. Newton's first equation of motion is employed in a given problem.

The change of displacement with respect to time is defined as the velocity.  Velocity is a vector quantity. it is a time-based component.

Given information;

Final velocity,v= 5 m\sec

Initial velociyt,u=20 m/sec

Acceleration,a=- 3m/s²

Time period,t=-?

From Newton's first equation of motion as;

\(\rm v = u+at \\\\ t= \frac{v-u}{a} \\\\ t= \frac{5 \ m/sec -20 m/sec }{-3 \ m/sec^2} \\\\\ t= 5 \ sec\)

Hence, the time it takes you to slow to 5 m/s will be 5 seconds.

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