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miss Akunina [59]

3 years ago

10

Si tengo 4litros de agua a 20C, calcula cuantos litros de agua a 32C tengo que agregar para que su temperatura de equilibrio sea

21C.

1 answer:

elena55 [62]3 years ago

6 0

Answer:

V = 0.364 litros

Explanation:

4 ltr (1000 gm/ltr) = 4000 gm

4000(20) + m(32) = (4000 + m)(21)

4000(20) + m(32) = 4000(21) + m(21)

m(32 - 21) = 4000(21 - 20)

11m = 4000

m = 363.6363...gm

363.6363 gm / 1000gm/ltr = 0.3636363... ltr

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2 years ago

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In a level parking lot, a man with a mass of 100 kg gives a shove to a boy with a mass of 50 kg who is on roller skates. The boy

natita [175]

Answer:

100N

Explanation:

Newton's third law states that whenever an object exerts a force on a second object, it exerts a force of equal magnitude and direction but in the opposite direction on the first. It is often stated as follows: Each action always opposes an equal but opposite reaction.

The subject 1 of 100kg is making a force F, to move an object from 50Kg to 2m / s ^ 2. This Force the object of 50Kg will reflect it in the opposite direction by Newton's third law.

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4 0

3 years ago

The data indicate the populations of mammals in the Florida Everglades in different years over the past two decades. The Burmese

soldier1979 [14.2K]

Answer:

C) Burmese pythons lack natural predators and can utilize a wide variety of food sources in the Everglades.

Explanation:

Due to it being an invasive specie (naturally found in South Asia), and also one of the five largest species of snakes in the world, the Burmese pythons lack natural predators in this new territories.

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3 years ago

Steam enters a well-insulated nozzle at 200 lbf/in.2 , 500F, with a velocity of 200 ft/s and exits at 60 lbf/in.2 with a velocit

Ede4ka [16]

Answer:

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Explanation:

We are given that

$P_1=200lbf/in^2$

$P_2=60lbf/in^2$

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$v_2=1700ft/s$

$T_1=500^{\circ}F$

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$C_p=1BTU/lb^{\circ}F$

We have to find the exit temperature.

By steady energy flow equation

$h_1+v^2_1+Q=h_2+v^2_2$

$C_pT_1+\frac{P^2_1}{25037}+Q=C_pT_2+\frac{P^2_2}{25037}$

$1BTU/lb=25037ft^2/s^2$

Substitute the values

$1\times 500+\frac{(200)^2}{25037}+0=1\times T_2+\frac{(1700)^2}{25037}$

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7 0

4 years ago

A turntable with a moment of inertia of 7.2 × − ⋅ rotates freely with an angular speed of 6.5 ⁄ . Riding on the rim of the turnt

irina1246 [14]

Answer:

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Explanation:

6 0

3 years ago