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I need some help with this performance task,, physics isn’t my strongest subject so help is much appreciated :)

(4/9 parts)

The conservation of the momentum allows to find the result of how the astronaut can return to the spacecraft is:

The momentum is defined as the product of the mass and the velocity of the body, for isolated systems the momentum  is conserved. If we define the system as consisting of the astronaut and the evo propellant, this system is isolated and the internal forces become zero. Let's find the moment in two moments.

Initial instant. Astronaut and thrust together.

        p₀ = 0

Final moment. The astronaut now the thruster in the opposite direction of the ship.

       [tex]m_f[/tex] = m v + M v '

where m is propellant mass and M the astronaut mass.

As the moment is preserved.

       0 = m v + M v ’

      v ’= [tex]- \frac{m}{M} \ v[/tex]  

We can see that the astronaut's speed is in the opposite direction to the propeller, that is, in the direction of the ship.

The magnitude of the velocity is given by the relationship between the masses.

In conclusion, using the conservation of the momentun we can find the result of how the astronaut can return to the ship is:

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Answer:

1cm=10mm

10cm/0.125mm

80pages

Explanation:

I have asked question in my profile please tell me the answer

Answer:

10N right

Explanation:

The 10N of force acting down and up on the object cancel out.

The 15N of force pulling the force to the right is stronger than the 5N of force pulling the object left

15N - 5N = 10N

The magnitude and unit is 10N, and the direction is right

Answer: see example due to variation of factor

Explanation:    w = m x g

Weight= Mass (in kg) x Gravity (9.8m/s)

To get to kg from lbs take your weight divide by 2.2lbs well get you to kg

Example

Let's say a boy weighs 145lbs

145kg/2.2lbs=66kg

Now we use the equation

w=m x g

65kg*9.81m/s=637.65N

Answer:ddddddddddddddd

Explanation:

The magnitude of the resulting acceleration of the block is 6.14 m/s².

The given parameters;

The net horizontal force on the block is calculated as follows;

[tex]F_x = 27 \ - 81 \times cos (60)\\\\F_x = -13.5 \ N[/tex]

The acceleration of the block is calculated as follows;

[tex]a = \frac{-13.5}{2.2} \\\\a = - 6.14 \ m/s^2\\\\a = 6.14 \ m/s^2 \ to \ the \ left[/tex]

Thus, the magnitude of the resulting acceleration of the block is 6.14 m/s².

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Answer:

Hey mate....

Explanation:

This is ur answer....

Hope it helps!

Brainliest pls!

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International system of units.French système international d'Unitès, international decimal system of weights and measures derived from and extending the metric system of units.Adopted by the 11th General conference on weights and measures (CGPM) in 1960, It is abbreviated SI in all languages.

The maximum height reached by the ball during the upward motion  is 24.7 m.

The given parameters;

The maximum height reached by the ball is determined using the third kinematic equation as shown below;

v² = u² - 2gh

where;

0 = u² - 2gh

2gh = u²

[tex]h = \frac{u^2}{2g} \\\\h = \frac{22^2}{2(9.8)} \\\\h = 24.7 \ m[/tex]

Thus, the maximum height reached by the ball during the upward motion  is 24.7 m.

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This question involves the concepts of uniform speed motion and average speed.

The average speed for the entire trip is "26.67 mi/h".

First, we need to find out the total time taken for the entire trip. For that purpose, we will break the entire trip into two halves of uniform speed motion:

[tex]Total\ Time = t_1+t_2\\\\Total\ Time = \frac{s_1}{v_1}+\frac{s_2}{v_2}\\\\Total\ Time = \frac{40\ mi}{20\ mi/h}+\frac{40\ mi}{40\ mi/h}\\\\Total\ Time = 2\ h + 1\ h\\Total\ Time = 3\ h[/tex]

Now, the average speed for the entire trip will be:

[tex]Average\ Speed = \frac{Total\ Distance}{Total\ Time}\\\\Average\ Speed =\frac{80\ mi}{3\ h}[/tex]

Average Speed = 26.67 mi/h

Learn more about average speed here:

https://brainly.com/question/12322912?referrer=searchResults

The attached picture explains the concept of average speed.

Answer:

Gibbs, free energy

Explanation:

Answer:

(Hope this helps can I pls have brainlist (crown)☺️)

Explanation:

But how did the Egyptians overcome the extreme friction of dragging such massive things through the sandy desert, some of which weighed more than 9,000 pounds? Researchers at the University of Amsterdam have come up with a very simple solution to the friction problem: they utilised water.

The pyramids were not built by slaves, contrary to common perception. Archaeologists discovered the ruins of a purpose-built town for the hundreds of labourers who constructed the renowned Giza pyramids about 4,500 years ago.

The Egyptians had to overcome the force of friction while dragging the big blocks of stone and the force of gravity while uplifting the large stone structure to a greater height when building the pyramids.

Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact.

The friction force prevents any two surfaces of objects from easily sliding over each other or slipping across one another. It depends upon the force applied to the object.

Thus, while constructing the pyramids, the Egyptians had to fight against the forces of gravity and friction as they lifted the massive stone edifice to a greater height.

Learn more about friction from here, link is given below,

brainly.com/question/24186853

#SPJ2

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Answer:

3g/cm³

Explanation:

Use the formula:

density = mass ÷ volume

Substitute (plug in) the values:

density = 3 ÷ 1 = 3g/cm³

Answer:

Every year, the moon moves about an inch away

Hello there I hope you are having a great day :)

Your Question, light travels 3,00,000 km/s. Is it velocity or speed?​

The answer would be speed,

Hopefully that helps you :)

Answer:

Vectors are defined as quantities which are fully described by both their magnitude and direction. By definition, a vector has a direction associated with it.

Explanation:

is this what you want?

Answer:

A force unit is defined as the product of a mass unit and a unit of acceleration.

Answer:

Force can be defined as a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object.

Explanation:

Force = M (Mass) * A (Acceleration)

The SI unit of Mass = KG

S.I. unit of acceleration is m/sec/sec = m/sec2

Hence, Unit of force is Kg m/Sec2

Since force is used so often, S. I. gives this unit a special name:

1 Newton = 1 kg m/sec2

Answer:

TRUE.

Explanation:

YES IT EFFECTS.

IT MAY HELP YOU.

Answer:

True

Explanation:

true because if you where to push a ball on a beach the friction with the sand would make it harder to push then being on concrete.

Answer:

there will be no more if a resource is used up you have to find a new aource

Answer:

ở đâu?

Explanation:

................

Answer:

Six is the only number that is both the sum and the product of three consecutive positive numbers.

Explanation:

Answer:

A rainbow requires water droplets to be floating in the air. That's why we see them right after it rains. The Sun must be behind you and the clouds cleared away from the Sun for the rainbow to appears.

Answer:

technically nfrbhrbbrbbf but also the skier can hurt himself if he speeds up

Explanation:

need points so plz like it

Answer:

Lenght= 12.92cm

Width= 52cm

Answer:

重力

Explanation:

这是正确的答案还是不是

Answer:

1. While boiling replace the cap and allow it to cool. Vapours inside condense and form water creating vacuum above them. Observation - The can crumbles due to air pressure from outside. This proves that air exerts pressure.

2. Measure the volume of the liquid displaced when the object is submerged. Measure the initial volume of water in graduated cylinder. Submerge the irregular object. Measure the final volume of the water.

— The difference between the initial volume and the final volume is the volume of the object.

hope can help ^_^

Answer:

[tex]{ \boxed{ \rm{pressure = \frac{weight}{area} }}} \\ \\ { \rm{pressure = \frac{200}{2} }} \\ \\ { \underline{ \underline{ \rm{ \: \: pressure = 100 \: pascals \: \: }}}}[/tex]