Two astronauts are playing catch in a zero gravitational field. Astronaut 1 of mass m1 is initially moving to the right with speed v1 . Astronaut 2 of mass m2 is initially moving to the right with speed v2>v1 . Astronaut 1 throws a ball of mass m with speed u relative to herself in a direction opposite to her motion. Astronaut 2 catches the ball. The final speed of astronaut 1 is vf,1 and the final speed of astronaut 2 is vf,2 .What is the speed vf,1 of astronaut 1 after throwing the ball?

Answers

Answer 1

The final velocity ([tex]v_1_f[/tex]) of the first astronaut will be greater than the final velocity of the second astronaut ([tex]v_2_f[/tex]) to ensure that the total initial momentum of both astronauts is equal to the total final momentum of both astronauts after throwing the ball.

The given parameters;

Mass of the first astronaut, = m₁Mass of the second astronaut, = m₂Initial velocity of the first astronaut, = v₁Initial velocity of the second astronaut, = v₂ > v₁Mass of the ball, = mSpeed of the ball, = uFinal velocity of the first astronaut, = [tex]v_f_1[/tex]Final velocity of the second astronaut, = [tex]v_f_2[/tex]

The final velocity of the first astronaut relative to the second astronaut after throwing the ball is determined by applying the principle of conservation of linear momentum.

[tex]m_1v_1 + m_2v_2 = m_2v_2_f + m_1v_1_f[/tex]

if v₂ > v₁, then [tex]v_1_f > v_2_f[/tex], to conserve the linear momentum.

Thus, the final velocity ([tex]v_1_f[/tex]) of the first astronaut will be greater than the final velocity of the second astronaut ([tex]v_2_f[/tex]) to ensure that the total initial momentum of both astronauts is equal to the total final momentum of both astronauts after throwing the ball.

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Answer:

Large-diameter pipelines can be used to convey water over large distances, while smaller-diameter pipelines can be used to provide bulk or individual supplies at the point of use. Aqueducts are canals used to bring water from a river or reservoir to a water distribution center.

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03. A rocket and its payload have a total mass of 5.0 × 104 kg. How large is the force produced by the engine (the thrust) when

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Changing classes, you walk 20.0 m down a hall, turn left, and then walk 10.0 m down another hall. Define a coordinate system and sketch the displacement vector. Also, sketch the displacement components, and then determine the vector's magnitude.

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Explanation:

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A car of mass 800kg travels a distance of 40m at constant speed in a duration of 2.0s. The car exerts a forward force of 15kN.
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Answers

W = F × s

W = 15kN × 40 m

W = 15.000 N × 40 m

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can you please explain this answer?

Answers

Answer:

Final velocity = 7.4m/s

Explanation:

Use the equation:

acceleration = (final velocity - initial velocity)/time

Rearrange to get:

final velocity = (acceleration * time) + initial velocity

Now just substitute with the values you already have:

Final velocity = (-9.8m/s^2 * 0.7s) + 0.5m/s

Final velocity = 7.36m/s

We are using 2 sig-figs, so:

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I NEED A 100% ACCURATE ANSWER FOR THIS QUESTION ASAP NO LINKS !!!

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Answer:

static friction

Explanation:

If a metal has a mass of 78.2 g and a volume of 11.4 mL, what is its density?

Answers

Answer:

6.86g/mL

Explanation:

The density of the metal would be approximately 6.859 grams per milliliter (g/mL).

Given that the mass (m) is 78.2 g and the volume (V) is 11.4 mL, we can plug these values into the formula:

Density is a physical property that quantitatively expresses how much mass is contained within a given volume of a substance. In other words, it is a measure of how tightly packed the particles or molecules of a material are. Mathematically, density is defined as the mass of an object (or substance) divided by its volume. It is often denoted by the Greek letter "ρ" (rho).

Density is defined as mass per unit volume. The formula for density is:

Density (ρ) = Mass (m) / Volume (V)

Density (ρ) = 78.2 g / 11.4 mL

Now, let's calculate the density:

Density (ρ) = 6.859 g/mL

So, the density of the metal is approximately 6.859 grams per milliliter (g/mL).

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on which temperature scale does the average kinetic energy of molecules double when the temperature doubles?

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Answer:

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how many electrons does boron have

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Answer:

5 Electrons

Explanation:

Boron has 5 protons, 5 neutrons and 5 electrons. The atomic number (also known as the proton number) of Boron is 5 as it has 5 protons. It has a mass number of 10, as protons and neutron have a relative atomic mass of 1 each, and a neutral charge, as there are equal numbers of +1 protons and −1 electrons.

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what makes a force a vector quantity

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Answer:

A vector quantity is a quantity that has both magnitude and direction.

Explanation:

why do solar eclipses happen only during a new moon?

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Answer:

For a solar eclipse to occur the moon must be between the earth and the sun (the light of the sun is blocked)'

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the growth of plantesimals from smaller solid particles that collided and stuck together

2 Select the correct answer. In a given chemical reaction, the energy of the products is less than the energy of the reactants. Which statement is true for this chemical reaction? O A Energy is absorbed in the reaction. OB. Energy is released in the reaction. OC. There is no transfer of energy in the reaction. OD Energy is lost in the reactlon. Reset Next ghts reserved.​

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Answer:

B Energy is released

Explanation:

Describe how energy is transferred in one of the sequences.

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Answer:

Energy transfer describes the changes in energy (a state function) that occur between organisms within an ecosystem. ... A food chain is a sequence of organisms that are connected by their feeding and productivity relationships; a food web is the interconnected set of many food chains. Energy transfer is a one-way process.

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Un resorte experimenta un alargamiento de 7cm al soportar un peso en uno de sus extremos. Si suconstante tiene un valor de 835 N/m, ¿Cuál es el valor de la fuerza de restauración?

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Answer:

ألا تعلم أنني أذكى منك؟

Explanation:

لذا لا تجرؤ على سؤالي هكذا؟

imagine your self as a basketball player.​

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Answer:

yap

Explanation:

so easy

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A footballer applies a force of 30.0N, for a period of 0.05s, if the mass of the ball is 0.075kg, calculate the speed which half of the ball moves

Answers

Answer: Calculate the speed which half of the ball moves:
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[6]
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Answer:

11 or 10 meters a second

Explanation:

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Answer:

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30098
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A 3000-kg spaceship is moving away from a space station at a constant speed of 3 m/s. The astronaut in the spaceship decides to return to the space station by switching on engines that expel fuel so that the sum of the forces exerted on the spaceship by the expelled fuel points toward the space station. What is the magnitude of the minimum force needed to bring the spaceship back to the space station

Answers

Answer:

P = m (v2 - v1)     change in momentum

P = - m v1  if v2 is to be zero

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F = m a = - m v1 / t

a = -v1 / t     or a * t = -v1`

Any combination of a and t that is greater than v1 will bring the space station to a halt

If a is small then t must be large

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suppose the blocks collide elastically. picking the positive direction to the right, what is the velocity of the bigger block after the collision takes place?

Answers

We have that with v_1 =v this goes to show that  the velocity of the bigger block after the collision takes place is v

From the question we are told

Suppose the blocks collide elastically. picking the positive direction to the right, what is the velocity of the bigger block after the collision takes place?

Generally the equation for Momentum   is mathematically given as

P=mv

Therefore

[tex]m_1v_2=m_2v_2[/tex]

Hence

[tex]v_1=\frac{m_2v_2}{m_1}[/tex]

Therefore

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Hence

[tex]2v+v=v_1+v_2\\\\v_1=v[/tex]

Now

with v_1 =v this goes to show that  the velocity of the bigger block after the collision takes place is v

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Answer:

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Answer:

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Explanation:

did it on edge

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i think it would be C also

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Answer:

His speed is 8.333 m/s.

Explanation:

Describe three characteristics of electromagnetic waves that make them useful for transmitting signals.

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Answer:

characteristics of electromagnetic waves:-

electromagnetic waves are transverse waves;electromagnetic waves can travel through a vacuum;electromagnetic waves travel at exactly the same speed in a vacuum, the speed of light, 300,000,000 m/s.

A characteristics Feature of electromagnetic waves that make them useful for transmitting signal is that they are easily transmitted through

In physics, electromagnetic radiation is defined as  waves created as a result of the electromagnetic field vibratons moving through space, carrying electromagnetic  energy. The waves produced  includes radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays.

The character of an electromagnetic wave is dependent on its frequency or wavelength making each electromagnetic spectrum having their own range of uses.

For transmitting signals, Radio waves as well as  Microwaves is useful , while the former help transmit  Information through radio and TV stations the later is used in satellite communications, this is because

They are easily transmitted through air. if absorbed by the human body, cannot cause damageThier directions can be changed or switched.

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make a island with all renewable energy soursws and how it works and about it but at year 9 level​

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Answer:

How are we expected to make an island

How is water cleaned in chongqing?

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Answer:

I know

Explanation:

it gets filterd out

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