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pentagon [3]
3 years ago
9

How to do this question about lens? Please help.

Physics
1 answer:
hichkok12 [17]3 years ago
4 0

Its six cm mate because you are multiply the numbers together then that total with the number of sides there are

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a 360 mile trip began on a greeway in a car traveling at 62 mph. Once the road became a 2 lane highway, the car slowed to 54 mph
Daniel [21]

Answer:

Time spent on the greenway road  = 4.5 hours

Time spent on the 2 lane road = 1.5 hours

Explanation:

The distance of the trip  is 360 miles and the initial speed of the car is 62 miles/hr and after the road became 2 lane highway the car slowed to 54 miles/hr.

Let us divide the trip into two

Greenway

speed = distance/time

speed = 62 mph

time = a

distance = speed × time

distance = 62a

2 lane highway

speed = distance/time

speed = 54 mph

time = b

distance = speed × time

distance = 54b

Total distance

62a + 54b = 360......................(i)

Total time

a + b = 6..............................(ii)

a = 6-b

insert a in equation (i)

62(6-b) + 54b = 360

372  - 62b + 54b = 360

-8b = 360-372

-8b = - 12

b = 12/8

b = 1.5

from equation (ii)

a + 1.5 = 6

a = 6 - 1.5

a = 4.5

8 0
2 years ago
With a mass of 109 kg, Baby Bird is the smallest monoplane ever
OLga [1]

Total resultant velocity=5.11-3.27=1.84m/s

  • m_1=61.4kg
  • m_2=109kg
  • v_1=1.84m/s
  • v_2=?

\\ \sf\longmapsto ∆P=P

\\ \sf\longmapsto m_1v_1=m_2v_2

\\ \sf\longmapsto v_2=\dfrac{m_1v_1}{m_2}

\\ \sf\longmapsto v_2=\dfrac{61.4(1.84)}{109}

\\ \sf\longmapsto v_2=112.976/109

\\ \sf\longmapsto v_2\approx 1.3m/s

4 0
3 years ago
Which apparatus is used to measure mass of a bread
Harrizon [31]

Explanation:

a triple beam balance can measure the mass of one slice of bread

3 0
2 years ago
Anti-reflective coatings on lenses use thin-film interference to eliminate the reflection of a particular color. Suppose a glass
Sidana [21]

Answer with Explanation:

We are given that

n_g=1.55

n_f=1.35

\lambda=521 nm=521\times 10^{-9} m

1 nm=10^{-9} m

a.We have to find the expression for  the minimum thickness the film can have ,t.

Condition for destructive interference

2nt=(m+\frac{1}{2})\lambda

t=\frac{(m+\frac{1}{2})\lambda}{2n}

For minimum thickness m=0

Then, t=\frac{\lambda}{4n}

b.Substitute the values

t=\frac{521\times 10^{-9}}{4\times 1.35}=96.5nm

7 0
3 years ago
Why does the sun appear to move across the sky over the course of the day? A. because the sun revolves around Earth B. because E
aev [14]
Pretty sure it's:
D. Earth rotates on its axis
6 0
2 years ago
Read 2 more answers
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