<span>This is best understood with Newtons Third Law of Motion: for every action there is an equal and opposite reaction. That should allow you to see the answer.</span>

5 0

3 years ago

A heat engine operates between a hot reservoir with a temperature of 400 K and a cold reservoir with a temperature of 300 K. The

natali 33 [55]

Answer:

Explanation:

Given

Temperature of Hot reservoir $T_1=400 K$

Temperature of Cold reservoir $T_2=300 K$

Heat reservoir $Q=500 J$

Work done $W=150 J$

heat Exhaust $Q_{rejection }=350 J$

$Q=W+Q_{rejected}$

$500=150+350$

L.H.S=R.H.S

thus it follows first law

$\eta _{carnot}=1-\frac{T_L}{T_H}$

$\eta _{carnot}=1-\frac{300}{400}$

$\eta _{carnot}=0.25$

Cycle Efficiency

$\eta =\frac{W}{Q}=\frac{150}{500}=0.3$

Carnot efficiency is less than cycle thus it violates second law

3 0

4 years ago

Auniform thin film of n=1.33 is on top of glass (n=1.5). When monochromatic light with tunable wavelength is directed from above

Aleonysh [2.5K]

Answer:

Explanation:

There is reflection ( two times ) from upper and lower surface of the film . In both cases , reflection is from low to high density medium so there is change in phase of 180 twice .

So for constructive interference

2μd = n λ₁ , d is thickness required , λ is wavelength n₁ is order of bright fringe

For destructive interference ( minimum light )

2μd = (2n+1) λ₂/2

n λ₁ =(2n+1) λ₂/2

(2n+1) / 2n = λ₁ / λ₂

= 650 / 505

= 5 / 4 ( approx )

2n = 4

n = 2

2μd = n λ₁

2 x 1.33 x d = 2 x 650 nm

d = 488.72 nm

5 0

3 years ago

Do part b please if you have a question just text me

gizmo_the_mogwai [7]

1 is the body cell and 2 is the gamete. he reason is because the 1st one consists of more chromosomes than the second. a gamete will only consist of 23 while a body cell will consist of 46

8 0

4 years ago