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yulyashka [42]
3 years ago
15

How can water boil without heat?​

Physics
1 answer:
kaheart [24]3 years ago
3 0

Answer:

Put water at room temperature into a vacuum chamber and begin removing the air. Eventually, the boiling temperature will fall below the water temperature and boiling will begin without heating. Or if you want to be easy but messy, add dry ice to a bowl of water and watch how the water starts to boil.

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When a charged particle moves at an angle of 25° with respect to a magnetic field, it experiences a magnetic force of magnitude
sasho [114]

Answer:57.7

Explanation:

Force on a moving charge in  a magnetic field is given by

F=q\times V\times Bsin\theta

Where F=Force experienced by charge

q=charge of particle

V=velocity of particle

B=magnetic field

F=qVBsin(25)-------1

2F=qVBsin(\theta )------2

Divide (1)&(2)

\frac{1}{2}=\frac{sin(25)}{sin(\theta)}

Sin(\theta )=2\times sin(25)

\theta =57.7 ^{\circ}

7 0
3 years ago
How much heat is required to convert 500g of liquid water at 28°C into steam at 150 °C? Take the specific heat capacity of water
storchak [24]

Answer:

Q = 1.404 × 10^(5) KJ

Explanation:

We are given:

Mass;m = 500 g = 0.5kg

Temperature 1;T1 = 28 °C

Temperature:T2 = 150 °C

Specific heat capacity;c_p = 4183 J/Kg °C

Latent heat of vaporization;L = 2.26 × 10^(6) J/Kg.

The heat energy needed is given by;

Q = sensible heat energy + Latent heat

Formula for sensible heat is;

Sensible heat energy = mc(t2 - t1)

Formula for Latent heat is ;

Latent heat = mL

Thus:

Q = mc(t2 - t1) + mL

Q = m[c(t2 - t1) + L]

Q = 0.5((4183(159 - 28) + (2.26 × 10^(6)))

Q = 1.404 × 10^(8) J = 1.404 × 10^(5) KJ

6 0
3 years ago
The theory that attitudes will be formed and changed according to one’s actual behaviors is the __________ theory. A. learning B
Ivenika [448]

Answer:

A is the answer

Explanation:

7 0
3 years ago
Read 2 more answers
A 2.0-Coulomb bead is given 20 Joules of electric potential energy by lifting it from the "ground" to point A. If a second bead
Katen [24]

Answer:

40 J

Explanation:

c_1 = 4 C

c_2 = 2 C

U_1 = 20 J

The potential energy is directly proportional to the charge of the particle

U\propto c

\dfrac{U_2}{U_1}=\dfrac{c_2}{c_1}\\\Rightarrow U_2=\dfrac{U_1c_2}{c_1}\\\Rightarrow U_2=\dfrac{20\times 4}{2}\\\Rightarrow U_2=40\ J

The potential energy expected is 40 J

4 0
3 years ago
If 12 coulombs of electric charge pass a point in 4.0
zubka84 [21]

Answer:

AS

Explanation:

6 0
3 years ago
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