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Ludmilka [50]
3 years ago
15

How much heat energy must be added to 52kg Of water at 68°F to raise the temperature to 212°F? The specific heat capacity for wa

ter is 4.186×10 to the third power J/kg times degrees Celsius
Physics
1 answer:
Anna [14]3 years ago
4 0

Answer:

The amount of energy added to rise the temperature Q = 17413.76 KJ

Explanation:

Mass of water = 52 kg

Initial temperature T_{1} = 68 °F = 20° c

Final temperature T_{2} = 212 °F = 100° c

Specific heat of water  C = 4.186 \frac{KJ}{kg c}

Now heat transfer Q = m × C × ( T_{2}  - T_{1} )

⇒ Q = 52 × 4.186 × ( 100 - 20 )

⇒ Q = 17413.76 KJ

This is the amount of energy added to rise the temperature.

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Calculate the velocity of a wave that has a frequency of 60 Hz and wavelength of 2.0 m/s
mote1985 [20]

Answer:We have , a relation in frequency f and wavelength  λ of a wave having the velocity v as ,

           v=fλ ,

given f=60Hz , λ=20m ,

therefore velocity of wave , v=60×20=1200m/s

3 0
3 years ago
Balance Ba(NO3)2 + Na2SO4 --> BaSO4 + NaNO3
Amiraneli [1.4K]
Ba(NO₃)₂  +  Na₂SO₄  → BaSO₄ + NaNO₃

By Trial and error.

Ba(NO₃)₂  +  Na₂SO₄  → BaSO₄ + 2NaNO₃

Check:

             LHS            RHS
Ba           1                1
N             2                2
S             1                1
O      3*2 + 4 = 10         4 + 2*3 = 10
8 0
3 years ago
Read 2 more answers
Apply what you know about forces to hypothesize how balanced and unbalanced forces acting on a moving car would affect the motio
rosijanka [135]
If an object<span> has a net </span>force<span> acting on it, it will accelerate. The </span>object<span> will speed up, slow down or change direction. An </span>unbalanced force<span> (net </span>force<span>) acting on an </span>object<span>changes its speed and/or direction of motion. An </span>unbalanced force<span> is an unopposed</span>force<span> that causes a change in motion.
thus the car would get its speed, and or direction mixed up</span>
7 0
4 years ago
A column of soldiers, marching at 114 steps per minute, keep in step with the beat of a drummer at the head of the column. It is
kipiarov [429]

Answer:

length of column is 140.42 m

Explanation:

in 1 min the soldiers travels 114 steps

so to complete 1 step the time taken by the soldiers =

t =  \dfrac{1\ min}{114}

t =  \dfrac{60}{114}  

t = 0.526 s

speed of sound = 343 m/s

length of the column = v × t

                                   = 343 m/s × 0.526 s

                                   = 140.42 m

hence the length of column is 140.42 m

5 0
3 years ago
On a planet with different gravity, would the molarity of water be different? explain your reasoning.
ruslelena [56]

On a planet with different gravity, the molarity of water won't be different as water produces regular natural gravity.

<h3>How to explain the gravity?</h3>

Although sunlight is the energy source, gravity is the main factor driving the water cycle. The Earth's gravity pulls matter downward and toward its center. Gravity is the force that attracts two objects. It pushes water downhill and precipitation from the clouds. Air and ocean water are also moved by gravity.

We understand that even if the gravitational pull varies throughout the universe, the molarity of water would be constant everywhere. This is thus because a substance's mass is unaffected by gravity; only its weight is. The quantity (or mass, indirectly) of a solute is used to calculate the molarity.

Here, on a planet with different gravity, the molarity of water won't be different as water produces regular natural gravity.

Learn more about gravity on:

brainly.com/question/557206

#SPJ1

5 0
1 year ago
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