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:

F' = 64 F

Explanation:

The electric force between charges is given by :

[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]

Where

q₁ and q₂ are charges

r is the distance between charges

When  each charge is doubled and the distance between them is 1/4 its original magnitude such that,

q₁' = 2q₁, q₂' = 2q₂ and r' = (r/4)

New force,

[tex]F'=\dfrac{kq_1'q_2'}{r'^2}[/tex]

Apply new values,

[tex]F'=\dfrac{k\times 2q_1\times 2q_2}{(\dfrac{r}{4})^2}\\\\=\dfrac{k\times 4q_1q_2}{\dfrac{r^2}{16}}\\\\=64\times \dfrac{kq_1q_2}{r^2}\\\\=64F[/tex]

So, the new force becomes 64 times the initial force.

Answer:

[tex]2380\ \text{m}[/tex]

[tex]7.93\times 10^{-6}\ \text{s}[/tex]

Explanation:

t = Temps mis par la foudre pour parcourir la distance = 7 secondes

v = Vitesse du son dans l'air = 340 m / s

La distance est donnée par

[tex]s=vt\\\Rightarrow s=340\times 7\\\Rightarrow s=2380\ \text{m}[/tex]

L'éclair est tombé à une distance de [tex]2380\ \text{m}[/tex]

c = Speed of light = [tex]3\times 10^8\ \text{m/s}[/tex]

Le temps est donné par

[tex]t=\dfrac{s}{c}\\\Rightarrow t=\dfrac{2380}{3\times 10^8}\\\Rightarrow t=7.93\times 10^{-6}\ \text{s}[/tex]

Le temps mis par la lumière pour parcourir la distance est de [tex]7.93\times 10^{-6}\ \text{s}[/tex].

Answer: 0.24 kg/m

Answer:

v = 1  i ^ m / s,   v = 1 m / s

Explanation:

In this problem we show the difference between vectors and scalars.

The average speed is

          v = Δx / Δt

The bold are vectors            

          Δx = 20-10 = 10 i^  m

           v = 10/10

           v = 1  i ^ m / s

the unit vector indicates that the velocity is on the x-axis

The average speed is

           v =Δx / Δt

           v = 10/10

           v = 1 m / s

in this case we have a scalar

Answer:

nvjch

ffufuxuhxjcjfbfdhdh

Answer:

2

Explanation:

There are two open surfaces obtained in a closed cylindrical Gaussian surface when we apply Gauss's Law on an infinite length line of charges. The two surfaces are the upper circular base and the lower circular base.

Moreover, Gauss Law states that the net electric flow outside to a closed surface is proportional to the electric charge within the closed surface.

Answer:

Gravity as well as electrostatic and magnetic attraction and repulsion provide real life examples of forces being exerted by one object on another without them being in contact with each other.

Explanation:

Hope that helps!:)

Answer:

Find the set of value of x Find the set of value of x which satisfy the inequality 2r2- 5x 2 18which satisfy the inequality 2r2- Find the set of value of x which satisfy the inequality 2r2- 5x 2 185x 2 18

Answer:

The correct answer is - 200000 J

Explanation:

We use the formula of kinetic energy:

The formula to calculate kinetic energy is,

Here,

Ec =1/2 x  m x v^2

The mass of the roller coaster is,  m  =  1000  k g

The speed of the roller coaster is, v = 20.0 m/s

 Therefore,

Ec=1/2 x 1000kg x (20m/s)^2 = 200.000Joule

200,000J

Answer:

[tex] {2 \times 10} - 7 = 12 {}^{2} \div x \\ x = 2 \times 10 - 7 \div 12 {}^{2} [/tex]

I'm just in jss2 but I read physics. this is what I think

Answer:

Explanation:

.

Answer:

Some electrons move from the neutral object to the positively charged object. Both objects become positively charged, but the object that started positively charged is less positively charged than it was initially.

Explanation:

This is because since protons do not move from the nucleus, but, electrons on the surface move, the electrons from the neutral object move to the positively charged object until there is no net movement of electrons between both objects. At this point, both objects carry the same charge and the positively charged object becomes less positively than it was initially.

Answer:

2.62×10⁻⁶ C

Explanation:

From the question,

Electric Field (E) = kq/r²....................... Equation 1

Where q = charge on the particle, r = distance of the electric field from  the charge,  k = coloumb's constant.

make q the subject of the equation

q = Er²/k.............................. Equation 2

Given: E = 102424 N/C, r = 23 cm = 0.23 m, k = 9×10⁹ Nm²/C².

Substitute these values into equation 2

q = (102424×0.23)/(9×10⁹)

q = 2.62×10⁻⁶ C

Hence the charge on the particle is 2.62×10⁻⁶ C

ok byy make me brilliant

Answer is in the photo. I can only upload it to a file hosting service. link below!

tinyurl.com/wpazsebu

Answer:

0 Kelvin is equal to -459.67 Fahrenheit which is also absolute zero. Along with that at zero Kelvin or minus 273 degrees Celsius or minus 459.67 Fahrenheit the particles stop moving and all disorder disappears. Thus, nothing can be colder than absolute zero on the Kelvin scale. Luckily 0 Kelvin is believed to be impossible to reach with our current technology.

-BlueBoy

Answer:

Inorganic.

Explanation:

The chemical change which describes the reactions of elements and compounds that, in general, do not involve carbon and typically take place in laboratories or industries is inorganic.

In Chemistry, an inorganic chemical reaction can be defined as a type of chemical reaction that occurs without a carbon-hydrogen bond.

On the other hand, organic chemistry deals with reaction that occur in the presence of carbon-hydrogen bonds such as hydrocarbons.

Answer:

the answer is kinetic energy

Answer:

given Power= 5.6×1000=5600watt

t=20min=20×60=1200sec. work done=?

P=w/t

w=pt=5600×1200=672×10^4Joule

The amount of work done by the motor is equal to 6.72 Megajoules.

Given the following data:

Conversion:

To determine the amount of work done by the motor:

Mathematically, the work done by an object with respect to power and time is given by the formula:

[tex]Work\;done = power \times time[/tex]

Substituting the given parameters into the formula, we have;

[tex]Work\;done = 5600 \times 1200[/tex]

Work done = 6,720,000 Joules

Note: 1,000,000 Joules = 1 Megajoules.

Work done = 6.72 Megajoules.

Read more on work done here: https://brainly.com/question/13818347

Answer:

Explanation:

Total Mass: 48+25=73 kg

Height: 15m

So work = mgh= 73×9.8× 15=10731 j

And this is positive work.

Answer:

we can't cry in space like we do earth.... because there is no gravity... due to which the tears not fall down..instead they make a liquid clump...near eyes

Answer:

La temperatura final es de aproximadamente 159,94°C

Explanation:

Los parámetros dados son;

La masa de la llave española de acero, m₁ = 200 gramos

La temperatura de la llave, T₁ = 550 ° C

La masa del recipiente de aluminio que contiene agua, m₂ = 250 gramos

La masa del agua en el recipiente de aluminio, m₃ = 220 gramos

La capacidad calorífica específica del hierro, [tex]C_{planchar}[/tex], c₁ = 0.499 ca/(g·°C)

La capacidad calorífica específica del aluminio, [tex]C_{Aluminio}[/tex], c₂ = 0.217 cal/(g·°C)

La capacidad calorífica específica del agua, [tex]C_{Agua}[/tex], c₃= 1 cal/(g·°C)

En equilibrio térmico, tenemos;

m₁·c₁·(T₁ - T) = m₂·c₂·(T -T₂) + m₃·c₃·(T - T₂)

Conectando los valores, da;

200 × 0.499 × (550 - T) = 250 × 0.217 × (T -18) + 220 × 1  × (T - 18)

Simplificando, usando una calculadora gráfica, obtenemos;

[tex]\dfrac{274450-499\cdot T}{5} = \dfrac{1097 \cdot T-19746}{4}[/tex]

De también encontramos 'T' al convertirlo en el tema de la ecuación anterior aún usando una calculadora gráfica;

T = 1196530/7481 °C ≈ 159.94°C

La temperatura final,T ≈ 159.94°C.

The final temperature, when thermal equilibrium is reached is 144°C.

Given the following data:

To determine the final temperature, when thermal equilibrium is reached:

Mathematically, heat capacity or quantity of heat is given by the formula;

[tex]Q = mc\theta[/tex]

Where:

At an equilibrium state, the quantity of heat for the three substances is given by the equation:

[tex]M_kC_k(\theta_2 - \theta_1) = M_aC_a(\theta_2 - \theta_1) + M_wC_w(\theta_2 - \theta_1)\\\\200 \times 0.499 \times (500 - \theta_2) = 250 \times 0.217 \times (\theta_2 - 18) + 220 \times 1 \times (\theta_2 - 18)\\\\99.8(500 - \theta_2) = 54.25(\theta_2 - 18) + 220(\theta_2 - 18)\\\\49900 -99.8\theta_2 = 54.25\theta_2 - 976.5 + 220\theta_2 - 3960\\\\220\theta_2 + 99.8\theta_2 + 54.25\theta_2 = 49900 + 3960\\\\374.05\theta_2 = 53860\\\\\theta_2 = \frac{53860}{374.05}[/tex]

Final temperature, [tex]\theta_2[/tex] = 143.99 ≈ 144°C

Read more: https://brainly.com/question/18877825

Ocean breezes are primarily due to convection, which is the transfer of heat through the movement of fluids or gases.  The correct option is B.

Convection is a method of heat transfer that occurs in fluids (liquids and gases) and involves the movement of material carrying thermal energy. In convection, heat is transferred by the movement of hot fluid from one place to another, which then causes the transfer of heat from the hot fluid to the cooler fluid or surface it comes into contact with.

Convection can occur in two ways:

Natural convection: It occurs due to the density differences caused by temperature variations within a fluid. When a fluid is heated, its density decreases, making it lighter and causing it to rise. As it rises, it cools, becomes denser and falls back down, creating a cycle that is known as a convection current.

Forced convection: In this type of convection, a fluid is forced to flow over a surface or through a channel, by an external agent like a fan or pump. The forced flow enhances the rate of heat transfer from the surface or through the channel, as compared to natural convection, where the fluid flow is driven only by buoyancy forces.

Convection is a very important process for heat transfer in many natural and industrial applications, including heating and cooling systems, meteorology, oceanography, and more.

Here in the Question,

Ocean breezes are primarily due to convection, which is the transfer of heat through the movement of fluids or gases. As the sun heats up the surface of the ocean, the air above it also heats up and rises. This creates a low pressure area that draws in cooler air from over the land, resulting in a breeze that blows from the ocean towards the shore. This is why sea breezes are generally felt during the day, when the land is warmer than the sea, and why they tend to die down at night, when the opposite occurs.

Therefore, The correct answer is B i.e convection.

To learn about the difference between conduction and convection click:

https://brainly.com/question/13104912

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Answer:

Sound and light are similar in that both are forms of energy that travel in waves. They both have properties of wavelength, freqency and amplitude. Here are some differences: Sound can only travel through a medium (substance) while light can travel through empty space.

Answer:

Sound and light are similar in that both are forms of energy that travel in waves. They both have properties of wavelength, freqency and amplitude. Here are some differences: Sound can only travel through a medium (substance) while light can travel through empty space.

Explanation:

Hope this helped Mark BRAINLEST

Answer: i think its local drive

Explanation:

Answer:

on the server

Explanation:

thats how the cloud works

Answer:

1240 m/s

Explanation:

[Do you mean 0.035 kg bullet?]

Since the momentum of the system is conserved,

Let u m/s be the initial velocity of the bullet

0.035u = 8.6(5+0.035)

u ~= 1237.1714 m/s

u = 1240 m/s (3 sig. fig.)

Answer:

261.64 hz

Explanation:

speed = distance/ time

s= 200/0.78= 256.41 ms^-1

by using v= (f) x ( lambda)

256.41/ 0.98 = f = 261.64 hz

The frequency of the wave with the given wavelength, traveling the given distance at the given time is 261.6 Hertz.

Wavelength is the distance over which the shapes of waves are repeated.

From the wavelength, frequency and speed relation,

λ = v ÷ f

Where λ is wavelength, v is velocity/speed and f is frequency.

Given that;

First, we determine the speed.

Speed = Distance / time

Speed = 2.0×10²m / 0.78s

Speed = 256.4m/s

Now, we find the frequency.

λ = v ÷ f

f = v ÷ λ

f = 256.4m/s ÷ 0.98m

f = 261.6s⁻¹

f = 261.6Hz

Therefore the frequency of the wave with the given wavelength traveling the given distance at the given time is 261.6 Hertz.

Learn more about Speed, Frequency and Wavelength here: brainly.com/question/27120701

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Explanation:

La electricidad fue uno de los mayores inventos tecnológicos y científicos del mundo que permitió una gran evolución de la sociedad.

Es a través de la electricidad que podemos realizar tareas que parecen tan habituales en la actualidad, como usar luz eléctrica, usar internet, conservar alimentos, tomar baños calientes, y otras tareas que forman parte de la rutina diaria de miles de personas alrededor del mundo. mundo.

Por tanto, es importante observar en un contexto general cómo la electricidad ha traído beneficios a la humanidad, como la conservación de los alimentos por ejemplo, que ha facilitado la vida cotidiana.

En el entorno empresarial, la electricidad posibilitó la creación de máquinas, la automatización del trabajo, lo que facilita las funciones de los empleados, aumenta la seguridad de la empresa, permite el crecimiento empresarial y la aparición de muchos productos y servicios que existen en la economía actual.

En medicina ayudó en el tratamiento de enfermedades, en la creación de medicamentos, etc.

En la sociedad, la electricidad hace posible el saneamiento, permite una mejor calidad de vida para las personas, un mayor intercambio de información y varios otros desarrollos que tienen un impacto directo en la vida de cualquier persona.

Things I personally use:

-- my eyes

-- my smartphone

-- my garage door opener

-- my TV;  also the TV remote

-- stove

-- microwave oven

-- toaster

-- night light

-- CD player

-- FM radio

-- car headlights

-- traffic stoplights

-- flashlight

-- telescope

-- binoculars

-- film camera

-- digital camera

-- GPS receiver

-- infrared thermometer

Things I don't personally use but are used by other people:

-- police radios

-- firemen's radios

-- EMT's ambulance radios

-- taxi drivers' radios

-- dentist's X-ray machine