A 2-m3 rigid insulated tank initially containing saturated water vapor at 1 MPa is connected through a valve to a supply line that carries steam at 400°C. Now the valve is opened, and steam is allowed to flow slowly into the tank until the pressure in the tank rises to 2 MPa. At this instant the tank temperature is measured to be 300°C. Determine the mass of the steam that has e

Answer:

Explanation:

The speed of the cat can be found by using the formula

[tex]v = \frac{d}{t} \\ [/tex]

d is the distance

t is the time taken

From the question we have

[tex]v = \frac{9}{16} = \\ = 0.5625[/tex]

We have the final answer as

Hope this helps you

Answer:

A mixture is a combination of two or more substances in any proportion. This is different from a compound, which consists of substances in fixed proportions. ... The lemonade pictured above is a mixture because it doesn't have fixed proportions of ingredients.

Explanation:

Answer:

False

Explanation:

The cryosphere is all the part of the earth where water is in solid form. Where wind interacts with rocks, it is an example of atmosphere - geosphere interaction.

Answer:

44M 64M

Explanation:

The final displacement of the duck would be 11.18 meters in NW, therefore the correct answer is option B.

Displacement describes this shift in location.

As given in the problem Donald Duck Matthews wanted to show up all his friends with the newfound dancing skills he left his house to go to dressers house 20 m north from where he was he's so dresser his moves went off to the next place and next stop was 10 m west at choirboys house luckily he saw Eddie there too.

After showing off his skills again he was satisfied, but he still had to show one last person up. His brother was 15 m South.

His final position would be 5 meters north and 10 meters west.

The displacement of the Duck = √( 10² + 5²)

                                                   = 11.18 meters in NW

Thus, the final displacement of the duck would be 11.18 meters in NW.

To learn more about displacement here, refer to the link;

brainly.com/question/10919017

#SPJ2

Answer:

if you place a glass of boiling water in a paper cup filled with hot pads

Explanation:

am I thinking too deeply into this or does it make sense

Answer:

a) uncertainty percentage = 10%

b) if R could be measured within 1%, uncertainty percentage is 9%,

it wouldn't make much difference

Explanation:

Given that;

velocity v = 4%

radius R = 2%

using calculation on errors / uncertainties in mumber,

To find error/uncertainty in aₙ

aₙ = V² / R

= V₂ × 1/R

V × V × 1/R

let U + V be x and relative error ΔV/V = 4% = 0.04

also, let R be Y and error (relative) ΔR/R = 2% = 0.02

so aₙ = V²/R = x² / y --------------------- let this be equ 1

Δaₙ/aₙ = ΔV/V + ΔR/R + ΔV/V             {V×V×1/R}

Δaₙ/aₙ  = 0.4 + 0.02 + 0.4

Δaₙ/aₙ  = 0.1

so 0.1 × 100 = 10%

therefore uncertainty percentage = 10%

if R could be measured within 1%

Δaₙ/aₙ = (0.04 × 2) + 0.01

= 0.08 + 0.01

= 0.09

so 0.09 × 100

= 9%

therefore if R could be measured within 1%, uncertainty percentage is 9%,

it wouldn't make much difference

Answer: A. Field

Explanation: Magnetic Field is the correct answer.

Answer:

A

Explanation:

Answer:

C. student viewed the ruler from a different angle

Explanation:

It is the problem of viewing the scale from different sides or angles. If we assume the actual length of the stick to be 22 cm. Then the first student measured the length by reading the values from 1 cm towards 22 cm on the scale. While, the second student measured the length of the stick by reading the values from the other side or the other angle of the scale, that is, from 30 cm mark towards 1 cm. And in that case the the length of the 22 cm long stick will appear  as:

30 cm - 22 cm = 8 cm

Therefore, the second student read 8 cm on scale. So, the correct option is:

C. student viewed the ruler from a different angle

Answer:

when the electron transferred permanently to another atom

Answer:

A) By applying a known force, and measuring it's acceleration.

Explanation:

This is actually something that astronauts do in space as a mathmatical exercise when calculating the mass of an object since F = m × a.

Once the force, and acceleration are applied, the only unknown is the mass which can be solved by dividing force over acceleration. This is because inertial mass is equal to gravitational mass.

Dimensional formula of stress is same as pressure.

Answer:

The  density is  [tex]\rho_{block} =  356 \ kg/m^3 [/tex]

Explanation:

From the question we are told that

   The proportion of the plastic under water is  p =  0.356

Generally at equilibrium the buoyant force is equal to the weight of the block i.e

         [tex]B =  mg[/tex]

Generally the Buoyant force is mathematically represented as

          [tex]B  =  \rho  *  V *  g[/tex]

Here [tex]\rho[/tex] density of the water with value

[tex]\rho =  1000 kg/m^3[/tex] ,

V is the volume of water displaced by the block which is [tex] p * V_{block [/tex] ,  

So

    [tex]1000 *  0.356 V_{block}  *  g  =  m *  g[/tex]

Here m is the mass of the block which is mathematically represented  as

        [tex]m  =  \rho_{block}  *  V_{block}[/tex]

So

         [tex]1000 *  0.356 V_{block}  *  g  =   \rho_{block}  *  V_{block}*  g[/tex]

         [tex]1000 *  0.356 V_{block}  =   \rho_{block}  *  V_{block}*  g[/tex]

       =>    [tex]\rho_{block} =  1000 *  0.356[/tex]

      =>    [tex]\rho_{block} =  356 \ kg/m^3 [/tex]

Answer:

Explanation:

Displacement is the shortest distance or path between two points.

1) Displacement = √(36² + 45²) = 57.63 miles

2) Displacement = √(100² + 500²) = 509.9 meters

3) Displacement = √(60² + 40²) = 72.11 miles

4) Displacement = √(700² + 500²) = 860.23 miles

5) Displacement = 300 - 300 = 0 miles

6) Displacement = 200 + 100 = 300 miles

7) Displacement = √(650² + 650²) = 919.24 miles

8) Yes, since a distance is moved in a direction

Answer:

Maximum range is achieved by launching the projectile at an  angles of 45 degrees.

so the answer is B

Explanation:

What is the range of a projectile?

this can be defined as the maximum horizontal distance covered by a projectile

R=v^2sin(2θ)/2g

Why is 45 degrees maximum range?

"The sine function reaches its largest output value, 1, with an input angle of 90 degrees, so we can see that for the longest-range puts 2θ = 90 degrees and, therefore, θ = 45 degrees."

Hence a projectile, travels the farthest when it is launched at an angle of 45 degrees

Answer:

dy

Explanation:

My guess of guts.

okay bye

Answer:

Blood is moved away from the brain

Explanation:

Took the test

Answer:  Scientists believe that about 25 of the known elements are essential to life. Just four of these – carbon, oxygen, hydrogen, and nitrogen– make up about 96% of the human body. Six common elements that are important in living things are  carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus. These large molecules  make up the structures of cells and carry out many  many processes essential to life.

Plz mark brainliest:)

Answer:

B

Explanation:

A normal heart rate is from 85-95% the other heart rate is not normal because your heart is beating more than normal

Answer:

Explanation:

In 1785, Coulomb investigated quantitatively, the force exerted between point charges.

The Coulomb's Law states that: "The force of attraction or repulsion between two, point charges is directly proportional to the product of magnitude of the charges and inversely proportional to the square of the distance between them. "

If q₁ and q₂ are two, point charges and r is the distance between them, then the electric force of attraction or repulsion F between them, according to Coulomb’s law will be:

F ∝ q₁q₂ ________________________ eqn (1)

F ∝ 1/r²  ________________________ eqn (2)

Combining eqn (1) and eqn (2), we get:

F ∝ (q₁ q₂)/r²  

F = (kq₁q₂)/r²  

where,

k = constant of proportionality = 9 x 10⁹ N.m² / C²

Answer:

2, 3, 4, 1

Explanation:

geosphere, hydrosphere, biosphere, and atmosphere

Answer:

Lithosphere hydrosphere biosphere atmosphere

Explanation:

So yea mark me brainliest

Answer:

lithium

Explanation:

I took physical science 2 years ago and passed with an A

Answer:

Airplane X has more gravitational potential energy than Airplane W

Explanation:

Gravitational potential energy is defined as "the energy acquired by an object due to its positional change in presence of gravitational force."

That being said, gravitational potential energy depends on the height of an object above the ground. It also depends on the mass of the object and even further, the amount of gravitational force that is applied.

And if we take a look at the question again, we'd agree that the two airplanes are flying at different heights, this means their gravitational potential energy will be different. And as such, Airplane X has more gravitational potential energy than Airplane W

Complete Question

The complete  question is shown on the first uploaded image

Answer:

Explanation:

From the question we are told that

     The original voltage is  [tex]V_o[/tex]

     The new voltage is [tex]V  =\frac{V_o}{2}[/tex]

     The capacitance is  [tex]C = 150\ nF = 150 *10^{-9} \  F[/tex]

     The first resistance is  [tex]R_i =  26 \Omega[/tex]

      The second resistance is [tex]R_E =  200 \Omega[/tex]

Generally the equivalent resistance is  

        [tex]R_e =  R_1 + R_E[/tex]

=>     [tex]R_e =  26 +200 [/tex]

=>     [tex]R_e = 226 \ \Omega [/tex]

Generally the time constant is mathematically represented as

     [tex]\tau  =  RC[/tex]

=>  [tex]\tau  =  226 * 150 *10^{-9}[/tex]

=>  [tex]\tau  =  3.39 *10^{-5} \  s [/tex]

Generally the voltage is mathematically represented as

    [tex]V =  V_o  e^{-\frac{t}{\tau} }[/tex]

=>   [tex]\frac{V_o}{2} =  V_o  e^{-\frac{t}{\tau} }[/tex]

=>   [tex]0.5 =    e^{-\frac{t}{\tau} }[/tex]

=>   [tex]ln(0.5) =    {-\frac{t}{ 3.39 *10^{-5} } }[/tex]

=>  [tex]ln(0.5)   * 3.39 *10^{-5}  =   -t [/tex]

=>  [tex]t = 2.35*10^{-5} \  s  [/tex]

Answer:

μk = 0.58

Explanation:

       [tex]F_{apph} = F_{app} * sin\theta = 126 N * sin 25 = 53.3 N[/tex]

       ⇒  [tex]F_{n} = - F_{apph} = -53.3 N[/tex]

       [tex]F_{g} = m_{b} * g = 8.5 Kg * (-9.8 m/s2) = -83.3 N[/tex]

       [tex]F_{appv} = F_{app}* cos\theta = 126 N * cos 25 = 114.2 N[/tex]

      [tex]F_{ff} = \mu_{k}* F_{n} =\mu_{k} * (-53.3 N)[/tex]

        μk = 0.58

Answer:

4m/s^2 ( A)

Explanation:

The solution is in the attached file

Explanation:

The question is incomplete. Here is the complete question.

A toy rocket is launched vertically from ground level (y = 0 m), at time t = 0.0 s. The rocket engine provides constant upward acceleration during the burn phase. At the instant of engine burnout, the rocket has risen to 98 m and acquired a velocity of  30m/s. The rocket continues to rise in unpowered flight, reaches maximum height, and falls back to the ground. The upward acceleration of the rocket during the burn phase is closest to...

Given

initial velocity of rocket u = 0m/s

final velocity of rocket = 30m/s

Height reached by the rocket = 98m

Required

upward acceleration of the rocket

Using the equation of motion below to get the acceleration a:

[tex]v^2 = u^2+2as\\30^2 = 0^2 + 2(a)(98)\\900 = 196a\\a = \frac{900}{196}\\a = 4.59m/s^2[/tex]

Hence  upward acceleration of the rocket during the burn phase is closest to 5m/s²

Note that the velocity used in calculation was assumed.

Answer:

she is in the air for approximately 0.62 seconds

Explanation:

We want to find the time for a free fall under the acceleration of gravity, covering a distance of 1.91 m, and considering that the woman doesn't impart initial velocity in the vertical direction. So we use the kinematic equation:

[tex]d=v_i\,t+ \frac{g}{2} \,t^21.91 = 0 +4.9\, t^2\\t^2=1.91/4.9\\t=\sqrt{1.91/4.9} \\t\approx 0.624\,\,sec[/tex]

Then she is in the air for approximately 0.62 seconds

Complete Question

The complete question is shown on the first uploaded image

Answer:

The correct option is  B

Explanation:

   The number  of alphabet is  n= 4  (a , b , c , d )

Generally the total  number of  string of length 10 over the 4 alphabets is  

     [tex]N  =  4^{10}[/tex]

Gnerally the number of string of length 10 that does not include b is  

     [tex]T =  3^{10}[/tex]    

Generally the number of strings of length 10 over the 4  alphabets that have at least one alphabet b  somewhere in the string is  

        [tex]G  =  N - T[/tex]

=>    [tex]G  =  4^{10} -  3^{10}[/tex]