Pick the winner! Which do you think will have more momentum and push the other backwards? And WHY? Explain assumptions you make: A big loaded truck driving on the freeway OR a baseball sized meteorite falling down from space​

Answer:

See below

Explanation:

It will be the beaker which has the least volume

   Density =  mass / volume

        if all of the masses are the same, then a small volume will make density the greatest

Answer:

C. There is a difference in air pressure.

Explanation:

Solution :

It is given that JeLysa Hanson went for a medical examination complaining shortness of breath and tightness in her chest. After the medical examination, she was diagnosed of a musculoskeletal pain that was due to the overexertion while practicing her new hobby of boxing.

Therefore the codes of her examinations are :

ICD Code :

\($R06.02$\) = shortness of breath

\($R07.89$\) = chest pain or chest tightness

\($M79.1$\) = musculoskeletal pain

\($X50.3XXS$\) = overexertion due to the repetitive body movement

Answer:

B

Explanation: You (with the ball in your hand)would move in the direction of the ball's initial motion. Momentum!

Answer: You would move backward.

Explanation: You would push back because you would move in the direction of the ball's initial motion.  The ball's initial motion is to come toward you, so you would most likely move backward.

Let me know if this is right! :)

Answer:

C

Explanation:

because it's new chemical substances

Part A. We are given that rock is thrown straight upwards from a bridge with an initial velocity of +35 m/s. To determine the velocity after 2 seconds we will use the following equation of motion for the velocity of a body in free fall:

Where:

Now, we plug in the values:

Now, we solve the operations:

Therefore, the velocity after 2 seconds is 15.4 m/s.

Part B. To determine the displacement we will use the following formula:

Now, we substitute the values:

Solving the operations:

Therefore, the displacement is 50.4 meters.

The frequency of the second overtone if the fundamental frequency is 308 Hz is equal to 1540 Hz.

An overtone can be described as any resonant frequency above the fundamental frequency of a sound. Overtones can be defined as all pitches higher than the lowest pitch within an individual sound. While the fundamental can be described as usually heard most prominently, overtones are present in any pitch except a true sine wave.

The lowest normal frequency is called the fundamental frequency, while the higher frequencies are known as overtones.

Given, the fundamental frequency, f₀ = 30 8 Hz

The relationship between the fundamental frequency and the second overtone is given by

f₂ = 5 f₀

f₂ = 5 × 308 = 1540 Hz

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Answer:

Si pienso en el día de mañana y cuando despierto pienso en el día que tengo por delante y preparo en mi mejor versión trataría de hacer las cosas que me gustan y dejar de lado las que me hacen mal y me estresan para poder disfrutar con total libertad.

Explanation:

Para poder ser la mejor versión de uno mismo una persona tiene que poder expresarse libremente, estar cómoda en el lugar que está para poder sentir y hacer lo que tiene ganas y lo que realmente le hace feliz.

Para algunos esa "mejor versión" puede tener que ver con exigencias físicas, como por ejemplo, entrenar para una carrera o prepararse para un evento deportivo. Para otras personas puede tener que ver con su potencial de estudio o académico por si tiene que rendir un examen, dar una exposición oral, una charla o una prueba laboral. Para otros puede tener que ver con perder miedos y soltar exigencias para poder ser libre de imposiciones externas.

Para que estas situaciones suceda la persona tiene que estar relajada, tranquila, en paz y pudiendo disfrutar en la mayor medida posible de todas sus cualidades y potencias.

Answer:

The correct answer is A) True.

False. A G2V star would not be the same temperature as a G2Ib star, even though they share the same spectral class.

The V and Ib designations refer to the luminosity class of the star, which indicates its size and brightness relative to other stars of the same spectral type. A G2V star is a main-sequence star with a size and luminosity that are typical for its mass, while a G2Ib star is a giant star that has exhausted the hydrogen in its core and has expanded and cooled.

As a result, the G2Ib star would be much larger and more luminous than the G2V star, despite being the same temperature or slightly cooler. The spectral classification of stars is based on their surface temperature, which affects the color and intensity of the light they emit, and is determined by analyzing their spectra.

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Answer:

417.5 kg

Explanation:

Since the gravitational for of attraction F, equals the weight of the object W when its close to the earth, F = GMm/R² = W = mg where m = mass of object and g = acceleration due to gravity close to the earth = 9.8 m/s².

g = GM/R² where  g = acceleration due to gravity close to the earth, G = universal gravitational constant = 6.67 × 10⁻¹¹ Nm²/kg², M = mass of earth = 5.927 × 10²⁴ kg and R = radius of earth = 6.4 × 10⁶ m

So, g = GM/R²

= 6.67 × 10⁻¹¹ Nm²/kg² × 5.927 × 10²⁴ kg/(6.4 × 10⁶ m)²

= 39.53 × 10¹³ Nm²/kg ÷ 40.96 × 10¹² m²

= 9.65 N/kg

≅ 9.7 N/kg

= 9.7 m/s²

Since W = 4050 N and W = mg

m = W/g = 4050 N/9.7 m/s²

= 417.53 kg

≅ 417.5 kg

So, the mass of the object is 417.5 kg

An example of a contractile source of motion restriction is the contraction of muscles in the human body.

Muscles in the human body play a crucial role in generating movement and controlling motion. Through the process of contraction, muscles have the ability to restrict or limit motion at specific joints, acting as a contractile source of motion restriction.

When muscles contract, they exert a pulling force on the bones they are connected to, resulting in movement at the joints. This contraction is achieved through the interaction of actin and myosin filaments within the muscle fibers. When a signal from the nervous system triggers muscle activation, calcium ions are released, allowing the actin and myosin filaments to slide past each other. This sliding motion generates force, causing the muscle fibers to shorten and contract.

By selectively contracting specific muscles, it is possible to restrict or limit motion at certain joints. For example, when you contract your bicep muscle, it restricts the motion at the elbow joint, causing the arm to bend. Similarly, when you contract your quadriceps muscles, they restrict the motion at the knee joint, allowing you to extend or straighten your leg.

In summary, the contraction of muscles serves as a contractile source of motion restriction. Through their ability to generate force and control joint movement, muscles play a crucial role in enabling and regulating various motions in the human body.

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Answer:

The answer is 5 a

Explanation:

First subtract two from ten then because of the friction. Next divide 40 kg by 8 N. When you do that you will get 5 for acceleration. Always make sure that you put the symbol next to your answer.

Answer:

1. the robber carrying the metal safe will hurt more because the metal safe is heavier, so the heavier will be the force on the opposite direction from the one he was running when he hit the wall

2. ???

Explanation:

1. 3rd newton law: "If two bodies exert forces on each other, these forces are equal in magnitude and opposite in direction"

2. I don't know

In the event of an accident or a car crash, road safety barriers and fences prevent automobiles from running off the road.

Newton's Three Laws of Physics can help explain what these safety barriers are and how they help to save lives during car accidents :

I.  Unless acted upon by an imbalanced force, an object at rest will remain at rest, and an object at constant velocity will remain at constant velocity.

II.  If an imbalanced force occurs, a mass will experience acceleration proportional to its magnitude.

III.  When you apply a force to an object, you will feel a force that is equal    in magnitude but opposite in direction.

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Answer:

Force of the ball against the bat

Explanation:

Newton's third law of motion states that for every action, there is an equal and opposite reaction. When a player hits a ball with a bat, the force the player exerted on the ball through the bat gave the ball a push force in the forward direction. This is an action force. Now that an action has been initiated, there must be a reaction according to Newton's third law of motion. The magnitude of the force on the ball equals the magnitude of the force on the bat. The direction of the force on the ball is opposite to the direction of the force on the ball. The ball will give the bat an equal and opposite force trying to push the bat backward by resisting the impact of the bat. This is the reaction. The ball will only move if the applied force is able to overcome the resisting force by the bat.

Where;

is the action force of the bat against the ball.

is the equal and opposite reaction force of the ball towards the ball.

The two balls will collide in 2 seconds if they start 30 feet apart.

To calculate the time it takes for the two balls to collide, we first need to calculate the distance between them. The distance between two objects is equal to their speed multiplied by the time it takes them to travel that distance: velocity × time = distance

In this case, we want our distance formula to be 3 ft/s × 2 seconds = 6 ft

Then, using our formula, we can find how long it would take for the two balls to collide by plugging in our numbers: 6 ft + 5 ft = 11 ft. When we add 11 ft into both sides of our equation, we get 0 seconds, which means that when these two balls collide, they collide at the same time.

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The answers include the following:

This is referred to as a barrier which restricts the flow of surface water and has different importance which include the generation of electricity through the wind turbines.

The dam uses the water current to move the turbines and there are some advantages which should be considered before it is constructed such as the control of flood and as a source of water supply.

Disadvantages such as local ecosystem disruption should also be considered so as to protect species and ensure that they don't go extinct.

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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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To determine the work done on the basketball by air resistance, we need to calculate the change in kinetic energy of the ball. The work done by air resistance is equal to the negative change in kinetic energy.

Mass of the ball (m) = 0.610 kg

Initial height (h1) = 1.90 m

Final height (h2) = 3.04 m

Initial speed (v1) = 7.03 m/s

Final speed (v2) = 4.29 m/s

The initial kinetic energy (KE1) of the ball is given by:

KE1 = (1/2)mv1^2

The final kinetic energy (KE2) of the ball is given by:

KE2 = (1/2)mv2^2

The work done by air resistance is given by:

Work = -(KE2 - KE1)

Substituting the given values into the equations:

KE1 = (1/2)(0.610 kg)(7.03 m/s)^2

KE2 = (1/2)(0.610 kg)(4.29 m/s)^2

Work = -[(1/2)(0.610 kg)(4.29 m/s)^2 - (1/2)(0.610 kg)(7.03 m/s)^2]

Calculating the work:

Work = -[(1/2)(0.610 kg)(18.3841 m^2/s^2) - (1/2)(0.610 kg)(34.2909 m^2/s^2)]

Work = -[5.63586705 J - 10.42909715 J]

Work = -(-4.7932301 J)

Work ≈ 4.793 J

Therefore, the work done on the ball by air resistance, a nonconservative force, is approximately 4.793 Joules.

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The metals were transported to the core via o convection.Higher temperatures are preferable for condensing the heavier rock and metallic elements.

As the rocky planets formed, this concentration in metals close to the sun was incorporated into them.Iron and nickel, two readily available metals, moved toward the planet centers, where gravitational pull was highest, as the planetary systems developed.

Unlike other planets which lack a solid surface, terrestrial planets are composed of rocks or metals and have a hard surface.A few moons, a molten hard rock core, and landforms like cliffs, valleys, volcanoes, and craters are other characteristics of terrestrial planets.

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According to the given statement , The elevator's speed can be determined using the concept of kinematic equations. Therefore, the elevator's speed at 4.00 m/s is 21.65 m/s.

The elevator's speed can be determined using the concept of kinematic equations. Given the elevator's mass of 827 kg, the tension in the cable of 7730 N, and the displacement of 5.00 m downward, we can find the elevator's speed at 4.00 s using the following steps:

1. Calculate the work done by the cable tension on the elevator:
- Work = Force * Displacement
- Work = 7730 N * 5.00 m
- Work = 38650 J

2. Use the work-energy theorem to relate the work done to the change in kinetic energy:
- Work = Change in Kinetic Energy
- Change in Kinetic Energy = 38650 J

3. Calculate the change in kinetic energy:
  - Change in Kinetic Energy = (1/2) * Mass * (Final Velocity² - Initial Velocity²)

4. Assume the initial velocity is 0 m/s, as the elevator starts from rest.

5. Rearrange the equation to solve for the final velocity:
  - Final Velocity² = (2 * Change in Kinetic Energy) / Mass
  - Final Velocity² = (2 * 38650 J) / 827 kg
  - Final Velocity² = 468.75 m²/s²

6. Take the square root of both sides to find the final velocity:
  - Final Velocity = √(468.75 m²/s²)
  - Final Velocity = 21.65 m/s

Therefore, the elevator's speed at 4.00 m/s is 21.65 m/s.

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1.33m/s^2 is the acceleration. when a billiard ball is decelerating at a constant rate. its initial velocity is 8m/s. after 1.5 seconds it is travelling at 6m/s.

The rate at which a moving object's velocity changes is known as acceleration. It gauges the speed of velocity changes. Examples of acceleration include riding a carousel and traveling at a constant speed around a bend on a road.

The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t).

a = (v_f - v_i) / Δt

a= 6m/s  - 8m/s / 1.5 seconds

a=-1.33m/s^2

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The question is incomplete as it does not have the options which are:

deciduous forest

taiga (boreal forest)

temperate rainforest

tropical rainforest

Answer:

Taiga (boreal forest)

Explanation:

A Biome refers to the habitat which is occupied by flora and fauna living in similar conditions.  These biomes are distinguished based on many features like precipitation, temperature and many other physical factors.

In the given question, the biome which receives an annual rainfall of 35 to 100 cm annually and is mostly covered by the coniferous trees is known as "Taiga biome" which is also known as Boreal forest.

The Taiga biome is one of the largest terrestrial biomes which is present in Eurasia and North America. The biome is characterised by the conifers trees and therefore is also known as the Coniferous trees.

Thus, Taiga (boreal forest) is the correct answer.

Answer: Taiga(boreal forest)

Explanation:

P=VI

Option B

Answer:

b) 0.75 W

Explanation:

Given that,

→ Potential difference (V) = 1.5 V

→ Current (I) = 0.5 A

→ Power (P) = ?

Formula we use,

→ P = V × I

Then the answer will be,

→ P = V × I

→ P = 1.5 × 0.5

→ [ P = 0.75 ]

Hence, the power is 0.75 W.

Answer:

120°

Explanation:

Given forces with magnitude F and F

Applying the parallelogram law of vector

Where resultant is given as :

R = √(A^2 + B^2 + 2ABCos Ф

WHERE A and B are two forces with angle Ф

F =√(F^2 + F^2 + 2F * F Cos Ф

Square both sides

F^2 = F^2 + F^2 + 2F^2 CosФ

F^2 - 2F^2 = 2F^2 CosФ

- F^2 = 2F^2 Cos Ф

Divide both sides by 2F^2

- 1 / 2 = CosФ

Cosine(theta) = - 1/2

Ф = cosi^-1 (-1/2)

Ф = 120°

Answer:

Option C is the correct statement.

Explanation:

Both coal-fired power plants and solar thermal power plants use a heat source to create steam, which then drives a turbine to generate electricity. In a coal-fired power plant, the heat is generated by burning coal to produce steam. In a solar thermal power plant, mirrors or lenses are used to concentrate sunlight onto a fluid, which is then heated to produce steam.

Option A is incorrect because coal is a non-renewable resource, while solar thermal power plants utilize renewable solar energy. Option B is incorrect because the conversion efficiency of coal-fired power plants is typically much lower than that of solar thermal power plants. Option D is partially correct, as coal-fired power plants are a major source of greenhouse gas emissions, while solar thermal power plants do not emit greenhouse gases during operation.

The statement "currently, we do not know what most of the mass and energy in the universe is and, therefore, have no way of detecting them" is true.

The composition of most of the mass and energy in the universe is currently unknown, and our ability to detect them is limited. Dark matter, which is thought to make up a significant portion of the mass in the universe, does not interact with light or other forms of electromagnetic radiation, making it challenging to observe directly.

Dark energy, on the other hand, is an elusive form of energy believed to be responsible for the accelerating expansion of the universe, but its nature and origin remain mysterious. Scientists continue to study and develop theories and experiments to shed light on the nature of these elusive components and further our understanding of the universe.

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