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erik [133]
3 years ago
15

If you walk 8km at an average speed of 4km/h, how much time does it take

Physics
2 answers:
PilotLPTM [1.2K]3 years ago
7 0
Distance = rate x time
8km = 4km/h x time
Time = 2 hours
Galina-37 [17]3 years ago
5 0

Answer:

2 hours

Explanation:

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An observer is approaching at stationary source at 17.0 m/s. Assuming the speed of sound is 343 m/s, what is the frequency heard
UNO [17]

Answer:

the frequency heard by the observer is equal to 2677 Hz

Explanation:

given,      

velocity of the observer = 17 m/s

speed of the sound = 343 m/s    

velocity of the source = 0 m/s    

frequency emitted from the source  = 2550 Hz              

f = f_0(\dfrac{v-v_0}{v-v_s})              

f = 2550\times (\dfrac{343+17}{343-0})

velocity of observer is negative as it is approaching the source.                   f = 2676.38 Hz ≈ 2677 Hz                    

hence, the frequency heard by the observer is equal to 2677 Hz

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3 years ago
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Answer:

Push or Pull Forces - example

When you push against a wall the force that you exert is an example of a push force. When you pull a trolley car the force that you exert is an example of pull force.

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3 years ago
Average distance of 160.0 cm. Its average time was 5.74 seconds. What is its average speed?
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Your answer is .279m/s
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As a tractor pulls a plow across a field, it exerts a force on the plow in the forward direction. What is the "equal and opposit
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Explanation:

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C. It helps scientists detect dark matter.

Explanation:

I got a 100% on my test. hope it help and I hope your having an awesome day :)

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