Two astronauts (each with mass 70 kg) push off each other in space. One astronaut carries 46.7 kg of equipment and moves away with a speed of 0.3 m/s.


Calculate the velocity of the other astronaut.

Answer:

The answer is "Including all three studies of 0s to 2s, that shift in momentum is equal".

Explanation:

Its shift in momentum doesn't really depend on the magnitude of its cars since the forces or time are similar throughout all vehicles.

Let's look at the speed of the car

[tex]F = m a\\\\a =\frac{F}{m}[/tex]

We use movies and find lips

[tex]\to v = v_0 + a t\\\\\to v = v_0 + (\frac{F}{m}) t[/tex]

The moment is defined by

[tex]\to p = m v[/tex]

The moment change

[tex]\Delta p = m v - m v_0[/tex]

Let's replace the speeds in this equation

[tex]\Delta p = m (v_0 + \frac{F}{m t}) - m v_0\\\\\Delta p = m v_0 + F t - m v_0\\\\\Delta p = F t[/tex]

They see that shift is not directly proportional to the mass of cars since the force and time were the same across all cars.

Answer:

I think it is difficult to determine what has caused climate change in the distant past because it must have been a long time ago so geologists can't carry out different experiments and figure out what gases the planet had conjured, so geologists can only make predictions based off the evidence they currently have from what the planet looked like before. The planet must have changed over the years, therefore the climate has also changed in the future, so they cannot work with how the planet looked in the past.

Answer:

the rocks have the same amount of thermal energy

Answer:

substances have different melting and boiling points to one another.

Explanation:

Explanation:

Each substance will have a different mass, so when the amount of heat and the change in temperature are held constant, the only variable is the mass. Therefore, because mass is the only variable, so because substances have different masses, they will have different specific heats.

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Answer:

jello

Explanation:

it jiggles

Answer:

the thermal energy absorbed is 46,893 J

Explanation:

Given;

mass of the water, m = 145 g = 0.145 kg

initial temperature of the water,  t₁ = 23 ⁰C

final temperature of the water, t₂ = 100 ⁰C

specific heat capacity of water, c = 4,200 J/kg.⁰C

The thermal energy absorbed is calculated as;

H = mcΔt

H = 0.145 x 4,200 x (100 - 23)

H = 46,893J

Therefore, the thermal energy absorbed is 46,893J

Answer:

Therefore, Train A is faster with 50km/h and a 5km/h difference

Explanation:

train A

150km/3h = 50km/h

train B

180km/4h = 45km/h

Answer:

Due to suffocation and toxic paint.

Explanation:

The population of hermit crabs has been decreasing because of suffocation and poison. Many crabs actually die slowly from suffocation because their gills require high humidity in order to breathe properly. Hermit crabs are slowly poisoned by tap water in which the toxic substances present in the paint that dissolves their shells that leads to the death of hermit crabs.

Hii!!! The correct answer is true. (:

Answer:

The time it takes for the change in the angular velocity to occur is 6.5 seconds

Explanation:

From the question, we have;

The angular acceleration of the wheel, α = -4.20 rad/s²

The final angular velocity of the wheel, ω = -26.0 rad/s

From the information, we have the initial direction of rotation of the wheel = Counterclockwise

The angular displacement while the change occurs = 0 rad/s

Therefore, the initial angular velocity of the wheel, ω₀ = 0 rad/s

We have;

[tex]\alpha = \dfrac{\omega -\omega _0 }{t - t_0}[/tex]

Where;

t - t₀ = The time it takes for the change to occur

[tex]\alpha = \dfrac{\omega -0 }{t - 0}[/tex]

When t₀ = 0, we have;

t - t₀ = t

[tex]\alpha = \dfrac{\omega }{t}[/tex]

[tex]\therefore t = \dfrac{\omega}{\alpha }[/tex]

[tex]\therefore t = \dfrac{-26 \, rad/s}{-4 \, rad/s^2 } \approx 6.5 \, seconds[/tex]

The time it takes for the change in the angular velocity to occur is t - t₀ = 6.5 seconds

Answer:

[tex]mv \div r \\ mass \times velocity \div radius[/tex]

Answer:

Neil Armstrong

Explanation:

Answer:

Neil Armstrong.

Explanation:

. PLEASE GIVE BRAINLIEST.

Two waves have the same amplitude but they can have different frequencies. The wave with a higher frequency will have greater energy. Therefore, the given statement is correct.

The frequency of electromagnetic waves or any wave can be described as the number of oscillations in one second. The frequency can be represented as per second or hertz.

The wavelength of the wave can be defined as the distance between two crests or troughs on a wave that is separated by a distance known as wavelength. The wavelength of the waves is expressed in meters.

The relationship between frequency (ν) and energy of the wave:

E = hν

The frequency of the waves has a direct relation with the energy of the waves. Therefore, the wave which has a higher frequency will carry greater energy whether they have the same amplitude.

Learn more about wavelength and frequency, here:

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Answer:

600J

Explanation:

W=Fd so, W=100*6=600J

Answer:

to heat spaces in buildingss

Explanation:

Answer:

a. 1100 meters.

b. Between B and C

c.1. Between point D and E

c2. Between point D and E

d. 3.7 m/s.

Explanation:

The girl travels the distance of 1100 meters from starting to the end. There is no motion occurs between B and C due to no change of distance value from 200 meters. Between point D and E, the girls covers 500 meters long distance and also covers fastest distance between point D and E because between point D and E, the girl covers 500 meters distance in 30 seconds which is the highest of all. The average speed of the girls is 3.7 meter/seconds if we divide total distance i.e. 1100 meters by time which is 300 seconds.

Answer:

A) s=1/2at^2

t=√(2s/a)=√(2x400)/10.0)=9.0s

B) v=at

v=10.0x9=90m/s

Answer:

Is to add all forces, for example either the gf = gravitational force

Ff= force fiction

Fn= normal force

Thus, fg + ff + fn = y will give you results

Well then the forces you use in your exercises or questions.

The equation for net force is: ΣF = ma

or, ΣF = Δp/Δt.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.

A spring balance can be used to calculate the Force. Newton is the SI unit of force.

Hence, net force applied on the object = mass × acceleration

ΣF = ma

It can be written in another from as:

net force applied on the object = change in momentum ÷ time interval

ΣF = Δp/Δt

So, the equation for net force is: ΣF = ma

or, ΣF = Δp/Δt.

Learn more about force here:

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Answer:

2500 and kg its is very easy do with method

The mechanical equilibrium condition allows to find the value of the normal for the body is:

Newton's second law establishes a relationship between the force, the mass and the acceleration of bodies, in the special case that the acceleration is zero, it is called a mechanical equilibrium condition.

       ∑ F = 0

A free body diagram is a diagram of the forces without the details of the bodies, in the attachment we can see this diagram, let's write the equilibrium condition for each axis.

x- axis

          Fₓ -fr = 0

y-axis

          F_y + N – W =0

Let's use trigonometry to find the components of the applied force.

            Cos 30= [tex]\frac{F_x}{F} [/tex]

            sin 30 = [tex]\frac{F_y}{F } [/tex]

            Fₓ = F cos 30

            [tex]F_y[/tex] = F sin 30

The weight of a body is the mass times the acceleration due to gravity.

           W = m g

Let's substitute.

           F sin 30 + N – m g = 0

           N= m g – F sin 30

Let's calculate.

           N = m 9.8 – 150 sin  30

           N = m 9.8 - 75

To finish the calculation, the mass of the body must be known, suppose a value of 10 kg.

          N=10 9.8 -75

          N = 23N

In conclusion using the mechanical equilibrium condition we can find the value of the normal for the body is:

Learn more about the mechanical equilibrium condition here: brainly.com/question/12804448

Answer:

25% :)

Explanation:

Answer:

The answer would be 0kg.

Your welcome.

Answer:

Explanation:

.

Answer:

A. The angle with which the light passes from glass into water is approximately 31.97°

B. The image formed is, real, inverted, and smaller than the object

C. The image distance is 53.2[tex]\overline 6[/tex] cm

The image is real

D. The magnification is approximately 0.182

E. The type of lens required is a concave lens which corrects the focus of a powerful eye lens or a long eyeball

Explanation:

The given parameters for the light wave are;

The refractive index of the glass medium, n₁ = 1.5

The angle of incidence of the light, θ₁ = 28°

The refractive index of water, n₂ = 1.33

A. Let θ₂ represent the angle with which the light passes from glass into water

Snell's law is mathematically stated as follows;

n₁·sin(θ₁) = n₂·sin(θ₂)

According to Snell's law, we have;

1.5 × sin(28°) = 1.33 × sin(θ₂)

sin(θ) = (1.5 × sin(28°))/1.33 = 0.52947920615

∴ θ₂ = arcsin(0.52947920615) ≈ 31.97°

The angle with which the light passes from glass into water, θ₂ ≈ 31.97°

B. Please find attached the drawing of the image created with Microsoft Visio

From the drawing, we have that the image formed is real inverted smaller than the object and between the focus and radius of curvature

C. The location of the object from the mirror, u = 94.0 cm

The focal length of the mirror, f = +34.0 cm

The mirror formula for a concave mirror is given as follows;

[tex]\dfrac{1}{f} = \dfrac{1}{u} + \dfrac{1}{v}[/tex]

Therefore, we have;

[tex]\dfrac{1}{34.0} = \dfrac{1}{94.0} + \dfrac{1}{v}[/tex]

[tex]\dfrac{1}{v} = \dfrac{1}{34.0} - \dfrac{1}{94.0} = \dfrac{15}{799}[/tex]

[tex]\therefore \dfrac{v}{1} = v =\dfrac{799}{15} = 56.2\overline 6[/tex]

The image distance, v = 799/15 = 53.2[tex]\overline 6[/tex] cm

Therefore the image is in front of the mirror, which is a real image

The image is real

D. The given parameters of the object and lens are;

The distance of the object from the lens, u = 65.0 cm

The distance of the image formed from the lens, i = -18 cm

The magnification, M, is given as follows;

[tex]M = \dfrac{-v}{u}[/tex]

Therefore;

[tex]M = \dfrac{-(-11.8)}{65.0} = \dfrac{59}{325} \approx 0.18153846153[/tex]

The magnification, M ≈ 0.182

E. For a person who is near sighted, the light from objects from distant location are almost parallel and are brought to a focus in front of the retina and therefore, they appear blurred

The use of a concave lens is required to correct nearsightedness as it causes the light to appear come from a point before the focus such that the divergent rays of the object refracted through the concave lens comes to a focus at the.

Answer:

      ρ = 20.4 kg / m³

Explanation:

For this exercise we use Archimedes' principle, the thrust on a submerged body is equal to the weight of the released liquid

           B = ρ g V_liquid           (1)

let's write the equilibrium equation

           F -W + B = 0

           B = W -F

let's calculate

           B = 0.900 9.8 - 2.94

            B = 5.88 N

From equation 1

            V_{liquid} =  [tex]\frac{B}{\rho_{Hg} g}[/tex]

            V_{liquid} = [tex]\frac{5.88}{13.6 \ 10^3 \ 9.8}[/tex]

            V_{liquid} = 4.41176 10⁻⁵ m³

in this case it is indicated that the body is completely submerged

           V_body = V_liquid = V

     the definition of density is

           ρ = m / V

           ρ = [tex]\frac{0.900 \ 10^{-3}}{ 4.41176 \ 10^{-5} }[/tex]

           ρ = 2.04 10¹ kg / m³

           ρ = 20.4 kg / m³

Answer:

It is hard to push the empty upside down mug inside the water as it has air present inside its cavity which prevents the water from entering inside the mug.

I hope this helps a little bit.