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Scorpion4ik [409]
4 years ago
15

The stoplights on a street are designed to keep traffic moving at 24 mi/h. The average length of a street block between traffic

lights is about 80 m. What must be the time delay between green lights on successive blocks to keep the traffic moving continuously? There are 1.609 × 103 m in a mile. Answer in units of s.
Physics
1 answer:
Crazy boy [7]4 years ago
5 0

Answer:

t = 7.5 s

Explanation:

As we know that the average speed between two lights is given as

v = 24 mph

here we know that

v = 24 \times \frac{1602 m}{3600 s}

v = 10.68 m/s

now the distance between two lights is 80 m

so here if all the cars are moving continuously between two lights then the time delay between two lights is given as

t = \frac{L}{v}

t = \frac{80}{10.68}

t = 7.5 s

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4 years ago
What do we mean when we say that two light rays striking a screen are in phase with each other?
andrey2020 [161]

Answer:

When the electric field due to one is a maximum, the electric field due to the other is also a maximum, and this relation is maintained as time passes.

Explanation:

Phase of a wave or light ray is the instantaneous situation of the cycle in which the wave is at a given time.

When two waves are in phase means that the maximum and minimum of both coincide in time. They are in the same point of their cycle at the same time. And this relationship is maintained as time passes.

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3 years ago
You place ammonium nitrate crystals in water and stirred. As you do so, the container becomes cold to the touch. This an example
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<u>Explanation:</u>

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While when there is transfer of heat from the system to surrounding , it will be exothermic reaction and the beaker will be getting hot in this process. So in the present case, the container is becoming cold because of occurrence of endothermic process.

8 0
4 years ago
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katrin2010 [14]

Answer:

ammeter

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hope this helps

6 0
3 years ago
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The first time we read this, we think that we'll have to go look up a bunch of stuff about the gravitational constant, centripetal force, orbital mechanics, the Moon's period of revolution, and who knows whut owl !

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8 0
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