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2 years ago

Ordinarily, when we talk about green infrastructure, what type of public element are we most likely to be discussing?

1 answer:

6 0

Parks and open spaces
hope that helps if u have any questions let me know and also if u could mark this as brainliest i would really appreciate it!

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Determine the frequency of light with a wavelength of 4.257x10^-7cm

TEA [102]

Answer:

frequency of light is $70.47\times 10^{15} \ per\ second$

Explanation:

Given

wavelength of light = $4.257\times 10^{-7}\ cm = 4.257\times 10^{-7} \times 10^{-2} \ m= 4.257\times 10^{-9}\ m$

Speed of Light = $3\times 10^8 \ m/s$

∴ Frequency of Light = $\frac{\textrm{Speed of Light}}{\textrm{wavelength}}=\frac{3\times 10^8}{4.257\times 10^{-9}}= 70.47\times 10^{15} \ per\ second$

7 0

3 years ago

A car can accelerate from a standstill to 100 km/h [E] in 9.60s. calculate the average acceleration

Lelu [443]

Answer:

Acceleration is :

a = 2.89 m/s2

Explanation:

Acceleration : It is the change in the velocity of the object per unit time.

The object starts from the rest , so the initial velocity of the object is zero.

Initial velocity , u = 0

Final velocity = 100 km/h

Change the velocity to m/s because[ time unit is in second(9.60 s)]

1 km = 1000 m

1 hour = 60 x 60 sec = 3600 sec

$1km/h=\frac{1000}{3600}m/s$

$1km/hr=\frac{5}{18}$

$100km/hr=\frac{5}{18}\times 100$

$v=\frac{5}{18}\times 100$

v = 27.78 m/s

u = 0 m/s

time = 9.60 s

The acceleration"a" is calculated using :

$a=\frac{v-u}{t}$

$a=\frac{27.78-0}{9.6}$

$a=\frac{27.78}{9.6}$

$a=2.89m/s^{2}$

5 0

3 years ago

Water evaporating from a puddle is an example of a

Flauer [41]

It is an example of physical change. The molecules are not changing, so it is not chemical, and a physical property is something that a physical thing has.

5 0

3 years ago

Read 2 more answers

(PLZ ANSWER SOON)

almond37 [142]

Answer:

10.5 k.J.

Explanation:

7 0

3 years ago

PLEASE ANSWER: The density of a gas at STP is 0.75 g/L. What is the mass of this gas?

BartSMP [9]

Answer:

the mass of the glass is 2

3 0

3 years ago