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3 years ago

A woman jogs 20 km in 4 hours, then another 10 km in 2 hours. What is her average speed?

Physics

1 answer:

murzikaleks [220]3 years ago

4 0

Answer:

I think 5 km/h but I am not sure

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Which of the following is true about wedges?

timofeeve [1]

Answer:

wedges are a type of inclined plane.

Explanation:

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3 years ago

A wave emitted from a source has a frequency of 10 Hz and wavelength 2.5 m. How much time will it take to reach a person located

const2013 [10]

Answer:

time taken by the wave to reach the person is 0.2 s

Explanation:

As we know that the speed of the wave is given as

$v = \lambda f$

here we know that the wavelength of the wave is

$\lambda = 2.5 m$

$f = 10 Hz$

now speed of the wave is given as

$v = 10(2.5)$

$v = 25 m/s$

Now time taken by the wave to reach 5 m distance is

$t = \frac{L}{v}$

$t = \frac{5}{25}$

$t = 0.2 s$

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3 years ago

1. Which object is farthest from the origin at t=2sec

Stolb23 [73]

Answer:

that one i know only pe not that sorry again

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2 years ago

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egoroff_w [7]

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2 years ago

In 2020, nasa confirmed the existence of what on the lunar surface?.

kipiarov [429]

Water was confirmed to be on the sunlit surface of the Moon

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2 years ago