1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ki77a [65]
3 years ago
8

A 4.45 kg block of ice at 0.00 ?c falls into the ocean and melts. the average temperature of the ocean is 3.70 ?c, including all

the deep water.
Physics
1 answer:
rodikova [14]3 years ago
4 0
The ocean does not change temperature but it does lose some entropy ( he gives heat to melt the ice and to warm it to 3.70° C ).
I ) For the ice:
1 ) For melting the ice:
Q = m · Lf = 4.45 kg · 334 · 10³ J/kg = 1,486,300 J
Δ S = Q / T = 1,486,300 J / 273.15 K = 5.441 · 10³ J/K.
2 ) To warm the melted ice to 3.70° C:
Q = m c Δ T = 4.45 kg · 4,190 J / kgK · 3.70 K = 68,988.35 J
Δ S = m c ln( T2/ T1 ) = 4.45 kg · 4,190 J/kgK · ln ( 276.85 / 273.15 ) =
= 18,645.5 · ln ( 1.01354 ) = 18.645.5 · 0.013454 = 250.8692 J/K
II ) For the ocean:
Δ S = Q / T = ( - 68,988.35  + 1,486,300 ) / 276.85 = - 5,617.8 J/K
The net entropy change:
Δ S = ΔS ice + ΔS ocean = 5,441.1 + 250.8692 - 5,617.8 = 74.1692 J/K
Answer: 74 J/K.

You might be interested in
You should vary your ____________ based on the size and noise level of the venue you are speaking in.
slamgirl [31]
I think, the best word to fill the blank is "voice". <span>You should vary your voice based on the size and noise level of the venue you are speaking in. Because when you are speaking you use your voice to be heard. Also, it is the only thing you can vary depending on the size and the noise when speaking in a certain location.</span>
7 0
4 years ago
Finish my home work please
RUDIKE [14]
For number 3 the answer is solid: pizza
 liquid: smoothie
gas: air diffuser
8 0
3 years ago
Read 2 more answers
Want in own words please<br><br> What determines whether something is solid or liquid or gas
ale4655 [162]

Answer:

An object could be determined as solid:

-It doesn't change shape easily.

-when lots of heat applied till melting point, it would melt or thaw (basically turn into liquid).

-turn to pieces or bent when enough force applied to it.

-the molecules attached with each other by strong forces, creating strong bonds.

An object could be determined as liquid:

-It changes shaped based on the container.

-when lots of heat applied till boiling point, it would vaporize

-the molecules have weak bonds, creating a lot of spaces.

-when heat extracted from the liquid till freezing point, it would freeze/hardened (turn into solid)

An object could be determined as gas:

-it doesn't have any shape or form.

-if fills in the container.

-if lots of heat applied, its molecules are going to move, vibrate,and transist faster; increasing pressure and volume.

-The molecules have very weak bonds, creating spacious space.

-when the heat are being extracted till certain freezing point, it is going to turn into liquid, then solid.

5 0
4 years ago
An athlete has a final velocity of 9.5 m/s. If the athlete starts from the blocks and has an initial velocity of 0 m/s, what is
arlik [135]
Answer :

Explanation:
a =vf -vi/t
a = 9.5m/s -om/s/41 s
a = 0. 23 m/s²
4 0
3 years ago
A 100 N force causes an object to accelerate at 2 m/s2. What is the mass of the<br> object?
satela [25.4K]

Answer:

50 kg

Explanation:

Given,

Force ( F ) = 100 N

Acceleration ( a ) = 2 m/s^2

To find : Mass ( m ) = ?

Formula : -

F = ma

m = F / a

= 100 / 2

m = 50 kg

Therefore, the mass of the object is 50 kg.

5 0
3 years ago
Other questions:
  • If you closely examine a wood screw, you will see that the threads on it form a long _________________ wrapped around a cylinder
    9·2 answers
  • A 3.6-volt battery is used to operate a cell phone
    13·2 answers
  • cheAt an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at rest, slides without fric
    10·1 answer
  • The cars salemens tells you that the car can go from a stopped position to 60 miles per hour in 6 seconds he is giving you the c
    14·1 answer
  • For the following questions, imagine the book drops in free fall and falls a distance d. For the system of the book and earth, t
    13·1 answer
  • When a crown of mass 14.7 kg is submerged in water, an accurate scale reads only 13.4 kg. What material is the crown made of?
    15·1 answer
  • What do we call the condition of the atmosphere at a certain time and place?
    12·1 answer
  • How should the mass of a harmonic oscillator be changed to double the frequency? Can the frequency be tripled by a suitable adju
    13·1 answer
  • PLEASE HELP EMERGENCYYYY!!!!
    6·1 answer
  • If ram is 40kg and travels 200m in 30 sec find his power​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!