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alukav5142 [94]
3 years ago
5

A man walks 7 km, east in 2 hours and 2 km in 1 hour in the same direction. a) what is

Physics
1 answer:
Rzqust [24]3 years ago
8 0

Explanation:

Average speed = distance / time

|v| = (7 km + 2 km) / (2 hr + 1 hr)

|v| = 3 km/hr

Average velocity = displacement / time

v = (7 km east + 2 km east) / (2 hr + 1 hr)

v = 3 km/hr east

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A floating ice block is pushed through a displacement d = (23 m) i - (9 m) j along a straight embankment by rushing water, which
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Answer:

Work = 5941 J

Explanation:

As we know that work done is given by the equation

W = F. d

here we know that

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also we have

d = (23m) \hat i - (9 m)\hat j

now from above formula we have

W = (200 N\hat i - 149 N \hat j).(23 m\hat i - 9m \hat j)

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3 years ago
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A car on a freeway speeds up to get around another car. The car speeds up from 20 m/s to 35 m/s in 5 seconds.
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Answer:

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Directly from the information given:

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2 years ago
Biotic factors are the blank and blank part of the ecosystem
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Abiotic factors are the nonliving physical and chemical components of an ecosystem, while biotic factors are the living components of an ecosystem. Both types of factors affect reproduction and survival

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A phosphodiester bond is used to:
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A. Join glycerol to fatty acids

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A bicyclist travels 4.5 km west, then travels 6.7 km at an angle 27.0 degrees South of West. What is the magnitude of the bicycl
Dimas [21]

Answer:

<em>10.90km</em>

Explanation:

Magnitude of the total displacement is expressed using the equation

d = √dx²+dy²

dx is the horizontal component of the displacement

dy is the vertical component of the displacement

dy = -6.7sin27°

dy = -6.7(0.4539)

dy = -3.042

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dx = -4.5 - 6.7cos27

dx = -4.5 -5.9697

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Recall that: d = √dx²+dy²

d = √(-3.042)²+(-10.4697)²

d = √9.2538+109.6146

d = √118.8684

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<em>Hence the magnitude of the bicyclist's total displacement is 10.90km</em>

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