HELP NOW PLEASE ANSWER THE QUESTION THE PICTURE IS ATTACHED BELOW

Responder:

3,37 m / s, + ve x - dirección

Explicación:

Utilizando la ley de conservación de la cantidad de movimiento expresada por la fórmula;

m1u1 + m2u2 = (m1 + m2) v

m1 y m2 son las masas de los objetos

u1 y u2 son sus velocidades iniciales

v es su velocidad común

Dado

m1 = 0,519 kg

u1 = 4,80 m / s

m2 = 0,220 kg

u2 = 0 m / s (cuerpo en reposo)

Necesario

Velocidad común v

Sustituir en la fórmula los valores dados;

0,519 (4,8) + 0,22 (0) = (0,519 + 0,220) v

2,4912 + 0 = 0,739 v

2,4912 = 0,739v

Dividir ambos lados por 0,739

2,4912 / 0,739 = 0,739 / 0,739

v = 3,37 m / s

Por lo tanto, la rapidez de ambas bolas después de la colisión es de 3.37 m.s hacia la dirección x positiva, ya que m1> m2 y la velocidad común es positiva.

Answer:

You can increase your cardio respiratory endurance by exercising on the regular base that increase your heart beat and breathing rates. Some examples of good exercise is running, jumping rope, swimming dancing ect.

Explanation:

You are welcome.

The net charge on the 20 μF capacitor attached across a 1000 V power supply is 20 milliCoulombs (mC).

The net charge on a capacitor can be calculated using the formula Q = CV, where Q represents the charge, C is the capacitance, and V is the voltage across the capacitor. In this case, the capacitance is given as 20 μF (microfarads), and the voltage is 1000 V.

First, we need to convert the capacitance from microfarads to farads. Since 1 μF is equal to \(10^{-6\) F, the capacitance becomes \(20 * 10^{-6\) F = \(2 * 10^{-5\) F.

Now, we can substitute the values into the formula: Q = (2 × \(10^{-5\) F) × (1000 V).

Calculating this expression gives us Q = 20 × \(10^{-3\) C. Since 1 C is equal to 1000 milliCoulombs (mC), the net charge on the capacitor is 20 mC.

Therefore, when the 20 μF capacitor is attached across a 1000 V power supply the net charge on it is about 20 milliCoulombs (mC).

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Answer:

Explanation:

The formula for kinetic energy  Ke=1/2mv^2 where Ke is kinetic energy, m=mass, and v= velocity.

If the kinetic energy is increased that means that there must be an increase in mass or velocity. However, since the velocity is squared that means that velocity affects the kinetic energy of the object more than the mass does.

Answer:

Conduction, Convection and Radiation

Explanation:

Hope this helps!

Answer:

Isaac Newton did not invent gravity. Gravity is a fundamental force of nature that has always existed. Newton's contribution was to formulate the laws of motion and universal gravitation, which helped to explain the behavior of objects under the influence of gravity.

As for how people flew before the development of powered flight, they relied on a variety of methods, such as gliding, using hot air balloons, and being lifted by the wind in kites. For example, in China, people have been flying kites for more than 2,000 years. In the late 18th century, the Montgolfier brothers developed hot air balloons, which allowed humans to ascend into the air for short periods of time. And in the late 19th and early 20th centuries, pioneers of aviation such as the Wright brothers and their contemporaries developed powered aircraft, which eventually led to modern air travel.

Answer:.pi/15 cm/s (approx .2094395 cm/s)

Explanation:

Use 2 as your radius which will make the circumference of the clock equal to 4 pi (remember the formula for circumference is pi * diameter)

Using the circuference we can use the formula Speed = distance/Time and plug in our numbers

4pi / 60 seconds = .2094395 cm/s or .002094395 m/s

The potential energy of the cat is 17.76 joules.

The kinetic energy of the cat just before hitting the ground is 84.59 joules.

Part 1:

The potential energy of the cat can be found using the formula:

potential energy = mass x gravity x height

where the mass of the cat is 3.63 kg, gravity is 9.81 m/s², and height is 0.5 meters.

Substituting these values in the formula, we get:

potential energy = 3.63 kg x 9.81 m/s² x 0.5 m

potential energy = 17.76 joules

Therefore, the potential energy of the cat is 17.76 joules.

Part 2:

The kinetic energy of the cat just before hitting the ground can be found using the formula:

kinetic energy = 0.5 x mass x velocity²

To find the velocity of the cat just before hitting the ground, we can use the equation of motion:

height = (1/2) x acceleration x time² + initial velocity x time

where height is 0.5 meters, acceleration is gravity (9.81 m/s²), time is 2 seconds, and initial velocity is 0 m/s (since the cat starts from rest).

Rearranging this equation to solve for velocity, we get:

velocity = (height - (1/2) x acceleration x time²) / time

velocity = (0.5 - (1/2) x 9.81 x 2²) / 2

velocity = -4.905 m/s (the negative sign indicates that the velocity is downward)

Substituting the mass of the cat (3.63 kg) and the velocity (-4.905 m/s) in the formula for kinetic energy, we get:

kinetic energy = 0.5 x 3.63 kg x (-4.905 m/s)²

kinetic energy = 84.59 joules

Therefore, the kinetic energy of the cat just before hitting the ground is 84.59 joules.

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Answer:

  294.524 m^3

Explanation:

The volume of a cylinder is given by the formula ...

  V = πr^2h

For a radius of 2.5 m and a length of 15 m, the volume is ...

  V = π(2.5 m)^2(15 m) = 93.75π m^3 ≈ 294.524 m^3

The volume is about 294.52 cubic meters.

A fuse at point T would be more effective in this circuit than a fuse at point U because a fuse at point T would protect the entire circuit, including the multiple-position switch, while a fuse at point U would only protect.

Fuse is an electrical safety device that is designed to protect an electrical circuit from excessive current. It consists of a metal strip or wire, which melts and breaks the circuit when too much current flows through it. The fuse is placed in series with the circuit, and when the current exceeds the rated value, the fuse melts and interrupts the circuit, preventing damage to the circuit and any electrical components connected to it. Fuses are typically used to protect electrical circuits and equipment from overloads, short circuits, and other dangerous conditions.

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Answer: Its nuclear fusion

Explanation:

Answer:

Pretty sure it's Radiation.

You reach a conclusion regarding your hypothesis after collecting and analyzing data. A conclusion summarizes what you learnt from an experiment. While forming your conclusion, consider if the data supports your theory.

Each step of the scientific method with its description.

1- C ( this is an assumption; a hypothesis is always based on an assumption. After the introductory analysis is complete, construct a hypothesis, or an instructed opinion, on the result of the experiment.

2- F ( this states to share the results with other classmates).It is important to share what you have learned with others. Scientists often find solutions to problems by knowing the results of other scientists' experiments.

3- D (this is a description of an experiment you could conduct; you test a hypothesis (usually) by conducting an experiment. A statistical hypothesis, seldom called affirmative data summary, is a hypothesis that is testable on the foundation of perceiving a method that is formed via a set of arbitrary variables.

4- A (this is something you could observe during the experiment, therefore it is an observation).Scientists use observation to gather and record data, which allows them to assemble and then test hypotheses and assumptions.

5- E (this sentence is a conclusion).After all the data is assembled in a form that associates it to your hypothesis, you can understand it and reach a judgment about the experiment.

6- B (This is an actual question) A question is what someone asks, normally when there is something that he or she does not know. In the article, a question mark comes at the end of a question.

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Full Question ;

Match each step of the scientific method with its description.

Tiles

1. construct a hypothesis

2. communicate the results

3. test the hypothesis

4. make observations

5. analyze the results and

make a conclusion

6. ask questions

Pairs

A. Bread, when kept in the open for a

long time, shows the presence of mold.

B. What causes mold growth on bread?

C. Changes in temperature may affect

the growth of mold on bread.

D. Keep the bread in different locations,

changing the temperature at each location.

E. Increased temperature leads to the

growth of mold.

F. Make a presentation of the data, and

The first angle at which the radio signal strength is at a maximum for listerners is 48.6°

The difference in the distance travelled by the waves from the two towers reaching a point P on the north-south line is given by:

δ = d₁ - d₂

where d₁ and d₂ are the distances from towers A and B, respectively, as shown in the diagram.

Using simple trigonometry, we have:

d₁ = AD = OB sin θd₂ = BD = OA sin θ

Therefore,δ = d₁ - d₂= (OB sin θ) - (OA sin θ)= (OB - OA) sin θ= AB sin θ= 400 sin θ∴ δ = 400 sin θ

The condition for maximum signal strength at the point P is when the path difference is equal to one wavelength (λ).

δ = λ ⇒ 400 sin θ = λ ⇒ sin θ = λ/400

The wavelength is given by the relation

λ = c/f, where c is the speed of light and f is the frequency of the wave.

Substituting the values, we get

λ = 3.0 × 10⁸ / 1.0 × 10⁶ = 300 m∴ sin θ = λ/400 = 300/400 = 0.75

Thus, the first angle at which the radio signal strength is at a maximum for listeners who are on a line 20.0 km north of the station is:

θ = sin⁻¹ (λ/400) = sin⁻¹ (0.75) = 48.6°

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Answer:

Given that the mass of the earth = 6 x 1024 kg, mass of the sun = 2 x 1030 kg, average distance between the two is 1.5 x 10-11 m and G = 6.67 x 10-11 Nm2kg-2

Explanation:

Answer:

B.5.4m

Explanation:

Potential Energy=mass×gravity×height

8000=150×9.8×x

8000=1470x

x=8000/1470=5.4m

The ratio of magnitude 2 to magnitude 1 after the electric field change when the proton returned to its  starting point.is 1:1

The protons are ejected into an electric field pointing due north, and after 2 seconds the electric field changes to a constant uniform electric field pointing due south. 8.49 seconds after the field change, the proton returned to its starting point.

The protons were initially stationary and accelerated by the electric field. A proton's acceleration is directly proportional to its electric field and inversely proportional to its mass.

Two oppositely directed fields act on the protons, implying a net acceleration of zero. Therefore, the ratio of the magnitude of electric field 2 to the magnitude of electric field 1 is 1:1.

The ratio of magnitude 2 to magnitude 1 is 1:1

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Answer:

all I know is C

are there more questions? anyone?

-KARL IS STOOPID

Explanation:

Answer:

7.34 meters

Explanation:

If the entire Kinetic energy is converted to Potential energy

1/2 mv^2 = mgh          didvide both sides by ' m '

1/2 v^2 = gh                 solve for 'h'

1/2 v^2 / g = h              plug in the given values  ,   g = 9.81 m/s^2

1/2 (12)^2 / 9.81 = h = 7.34 m

Answer:

The radius will be "100.31 m". A further solving is given below.

Explanation:

The given values are:

Time,

T = 2 minutes

i.e.,

 = 120 seconds

Speed,

V = 5.25 m/s

As we know

⇒  \(T=\frac{2 \pi R}{V}\)

then,

⇒  \(R=\frac{TV}{2 \pi}\)

On substituting the given values, we get

⇒      \(=\frac{120\times 5.25}{2\times 3.14}\)

⇒      \(=\frac{630}{6.28}\)

⇒      \(=100.31 \ m\)

Answer: 4.44444444444

Explanation: Change in Velocity/Time = Acceleration

80.0/18.0 = 4.44444444444

The acceleration of the car is \(4.44 m/s^2\).

Acceleration is defined as the rate of change of velocity which means that the momentum is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating because the direction of its velocity is changing. An object's acceleration is described as the net result of any and all forces acting on the object, which is described by Newton's Second Law

Accelerations are vector quantities as it has both magnitude as well as direction.  The SI unit for acceleration is meter per second squared \((m s^-^2)\)

The initial velocity of the car is 0 m/s since it starts from rest. The final velocity is 80 m/s. So the change in velocity is,

\(V_f-V_i\) = 80m/s-0m/s = 80m/s

Time= 18 seconds

So, Acceleration= Change in velocity/ Time taken

a= 80/18= \(4.44m/s^2\)

Thus, the acceleration of the car is \(4.44 m/s^2\).

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Answer:

245.1° and 13 knots

Explanation:

The given parameters are;

The true heading = 135°

The resultant ground track = 130°

The true airspeed = 135 knots

The ground speed = 140 knots

Given that the true airspeed the ground speed and the wind direction and magnitude form a triangle, we have;

From cosine rule, we have;

a² = b² + c² - 2×b×c×cos(A)

Where

a = The magnitude of the wind speed in knot

b = The true airspeed = 135 knots

c = The ground speed = 140 knots

A = The angle in between the true heading and the resultant ground track heading = 5°

Which gives;

a² = 135² + 140² - 2×135×140×cos(5 degrees) = 168.84 knots²

a = √168.84 = 12.9934 ≈ 13 knots

We have;

135 × sin(135 degrees) - 140× sin(130 degrees) = -11.7868

135 × cos(135 degrees) - 140× cos(130 degrees) = -5.469

Tan(θ) = -11.8/-5.5 = 2.155

θ = tan⁻¹(2.155) = 65.108°

Given that the wind is moving in opposite direction (slowing down the airplane, we add 180°, to get

Therefore, the angle direction = 180 + 65.108 = 245.1

Therefore, we have;

245.1° and 13 knots

Answer:

2m/s

Explanation:

speed = distance÷time

speed =90÷45=2m/s

Answer:

the first one

Explanation:

Answer:

Light travels at the same speed even if the light source is moving.

Explanation:

I took the test, hope this helps :)

To create a graph of the data you collected during the lab, first, organize the data, then select the best type of graph, and finally create the graph.

One of the steps you need to complete after an experiment is to graph your results. This implies organizing the data and creating a diagram to visually represent your findings.

These are the steps you can follow to complete this task:

Each of these graphs focuses on specific types of data, and therefore you need to select the one that best fits the data you collected.

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The femur can withstand a compression of about 4.1945 mm before breaking.

We can use the formula for compressive stress to calculate the amount of compression that the femur bone can withstand before breaking:

Stress = Force / Area

where the force is the force applied to the bone and the area is the cross-sectional area of the bone.

To find the cross-sectional area of the femur bone, we can assume that it has a circular cross-section and use the formula:

Area = πr^2

where r is the radius of the cross-section.

Since the length of the femur bone is 0.5 m, we can assume that the cross-sectional area remains constant along its length.

Let's assume that the force required to break the bone is the maximum compressive stress that it can withstand, which is 1.51 × 10^8 Pa. We can rearrange the stress formula to solve for the force.

We can use the equation for strain under compression:

strain = stress / Young's modulus

where stress is the maximum stress the bone can withstand before breaking, and Young's modulus is a measure of the stiffness of the material. The strain is a measure of how much the bone compresses under stress.

To find the compression distance, we can rearrange this equation to solve for the compression distance:

compression distance = strain x original length

where the original length is the length of the bone before compression

Substituting the given values:

stress = 1.51 × 10^8 Pa

Young's modulus = 1.8 × 10^10 Pa

original length = 0.5 m

First, we can calculate the strain:

strain = stress / Young's modulus = (1.51 × 10^8 Pa) / (1.8 × 10^10 Pa) ≈ 0.008389

Next, we can calculate the compression distance:

compression distance = strain x original length = (0.008389) x (0.5 m) = 0.0041945 m

Finally, we can convert the result to millimeters:

compression distance = 0.0041945 m x (1000 mm/m) = 4.1945 mm

Therefore, the femur can withstand a compression of about 4.1945 mm before breaking using Stress = Force / Area

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Part (a)

The potential energy of the block due to its height can be given as,

The potential energy due to presence of spring can be expressed as,

Equating both the values,

Substitute the known values,

Thus, the maximum compression of the spring is 0.253 m.

Part (b)

Since the slide is frictionless, therefore no energy loss happened during the sliding of block. Therefore, the block will rise up to the same initial height which is 0.500 m.

Answer:

decomposition reaction

Explanation:

decomposition reactions occurs when one substance breaks down, or decomposes, into two or more substances

Answer:

15J

Explanation:

Let's assume force and motion have the same direction, so the dot product between the two reduces to the product of magnitudes.

If you studied calculus:  \(w= \int \limits^3_0 6x-4dx\), by definition. Some "easy" math, that's \((3x^2-4x)\limits^3_0=27-12 - 0 = 15 J\)

Else. we have to take the long way.  if the force was constant, and you plotted magnitude of the force vs position in a graph, you would get an horizontal line, and your work would be the area between the line and the x axis. And there is no reason why it shouldn't be the same for a variable force - if you think about it, it's the same way they justify the position formula for an accelerated motion. Let's graph it and start debating - sorry for my paint skills. We can easily say that in the green triangle the force is opposing the motion, so its work is negative, while in the blue area force and displacement go in the same direction, thus work is positive. Now it's just to calculate the area of two triangles

For the green one, it's a right triangle with side lengths 4 and 2/3, whose area is \(\frac12(4)(\frac23) = \frac43\).

For the blue triangle, it's again a right triangle with side lengths 14 and 3-2/3= 7/3, whose area is \(\frac12(14)(\frac73) = \frac{49}3\)

Our total work is the difference between the two, or \(w= \frac{49}3-\frac43 = \frac{45}3 = 15\)

Answer:

The force of gravity exerts a downward force. The floor exerts an upward force. Since these two forces are of equal magnitude and in opposite directions, they balance each other.

Answer:

315 meters

Explanation:

You just multiply 45 by 7