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scoray [572]
3 years ago
12

9. A sports car travels on a straight road at 22.0 km/h and increases its speed to 57.0 km/h in

Physics
1 answer:
Varvara68 [4.7K]3 years ago
6 0

Answer:

4.4 M/s

Explanation:

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LUCKY_DIMON [66]

Answer:

Explanation:

a.

b. R3= 1/2R2=6 ôm

R12= R1+R2=20 ôm

Rtđ=R12.R3/R12+R3= 4,62 ôm

c. U= I.Rtđ = 2.4,62=9,23 V

I1=I2= 9,23/20= 0,4615 A

I3= 2-0,4615=1,5385 A

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2 years ago
Two flat glass surfaces are separated by a 150-nm gap of air.
elena-s [515]

Answer:

a. 600 nm

b. 300 nm

Explanation:

According to the question it is given that there is two flat glass surface that is separated by 150nm air gap

Based on the above information

The computation is shown below

a. The bright thickness is

t = \frac{\lambda}{2} (m - \frac{1}{2} )\\\\\lambda = \frac{2t}{(m - \frac{1}{2} )} \\\\\frac{2(150)}{(1 - \frac{1}{2} )} \\\\

= 600 nm

b. The dark thickness is

t = \frac{m\lambda }{2} \\\\\lambda = \frac{2t}{m} \\\\\frac{2(150)}{1}

= 300 nm

7 0
2 years ago
Nitrogen is used in many plant fertilizers. When it rains, the excess fertilizers run off into streams, rivers, and eventually a
allsm [11]

C. Farmers and gardeners should use other methods..........

3 0
3 years ago
Read 2 more answers
The wavelength of a wave is 4 metre & its time period is 2 second. What is speed of the wave?
Harlamova29_29 [7]

Answer:  The speed of wave is 2m/s.

Explanation:

The speed of wave equals to the distance/time. So when we divide 4m and 2s, we get that the speed of wave is 2m/s

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