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Elodia [21]
3 years ago
10

What is special about decomposers? *

Physics
1 answer:
Bogdan [553]3 years ago
5 0
D. They are heterotrophs that digest food internally.
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When an aluminum bar is connected between a hot reservoir at 720 K and a cold reservoir at 358 K, 3.00 kJ of energy is transferr
disa [49]

Answer:

a.  -4.166 J/K

b. 8.37 J/K

c. 4.21 J/K

d. entropy always increases.

Explanation:

Given :

Temperature at hot reservoir , $T_h$ = 720 K

Temperature at cold reservoir , $T_c$ = 358 K

Transfer of heat, dQ = 3.00 kJ = 3000 J

(a). In the hot reservoir, the change of entropy is given by:

$dS_h= -\frac{dQ}{t_h}$              (the negative sign shows the loss of heat)

$dS_h= -\frac{3000}{720}$

      =  -4.166 J/K

(b)  In the cold reservoir, the change of entropy is given by:

$dS_c= \frac{dQ}{t_c}$              

$dS_c= \frac{3000}{358}$

      =  8.37 J/K

(c). The entropy change in the universe is given by:

$dS=dS_h+dS_c$

    = -4.16+8.37

   = 4.21 J/K

(d). According to the concept of entropy, the entropy of the universe is always increasing and never decreasing for an irreversible process. If the entropy of universe decreases, it violates the laws of thermodynamics. Hence, in part (c), the result have to be positive.

5 0
3 years ago
A train whistle is 580 Hz when stationary. It is moving away from you at 18.8 m/s. What frequency do you hear?
Natalija [7]

Answer

613.63Hz

Explanation:

Fobs = (V/V-Vsource)Force

V=speed of sound

Fobs= (343/343-18.8)580

Fobs= 613.63Hz

Fobs = frequency observed

brainly.com/question/15339151

8 0
2 years ago
Who yall think gonna win Seahawks or Vikings? Seahawks all the way
myrzilka [38]

Answer:

Seahawks

Explanation:

THEY ARE THE BEST TEAM!!!

3 0
3 years ago
Read 2 more answers
A 70.0-kg ice hockey goalie, originally at rest, catches a 0.150-kg hockey puck slapped at him at a velocity of 35.0 m/s. Suppos
brilliants [131]

Answer:

v₂=- 34 .85 m/s

v₁=0.14 m/s

Explanation:

Given that

m₁=70 kg ,u₁=0 m/s

m₂=0.15 kg ,u₂=35 m/s

Given that collision is elastic .We know that for elastic  collision

Lets take their final speed is v₁ and v₂

From momentum conservation

m₁u₁+m₂u₂=m₁v₁+m₂v₂

70 x 0+ 0.15 x 35 = 70 x v₁ + 0.15 x v₂

70 x v₁ + 0.15 x v₂=5.25                   --------1

v₂-v₁=u₁-u₂            ( e= 1)

v₂-v₁ = -35        --------2

By solving above equations

v₂=- 34 .85 m/s

v₁=0.14 m/s

4 0
3 years ago
How do the forces on a skydiver affect the velocity of the skydiver as they fall?<br><br><br> Hellp
solmaris [256]

Answer:

Explanation:

As a skydiver falls, he accelerates downwards, gaining speed with each second. The increase in speed is accompanied by an increase in air resistance. This force of air resistance counters the force of gravity.

3 0
3 years ago
Read 2 more answers
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