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2 years ago

15

A backpacker walks for 3 days in the mountains and covers 16 km. How fast was he walking in km/hr?

1 answer:

Fudgin [204]2 years ago

5 0

Answer:

0.22 km/h

Explanation:

72 hours in 3 days

16/72 = 0.222222222

round to 0.22 km/h

For future reference, Distance/Time= Speed

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The volume of a rectangular prism is given by the formula V = lwh, where l is the length of the prism, w is the width, and h is

Verizon [17]

<span> For this case the volume of the box is given by:
</span> $V = lwh
$
<span> Substituting values we have:
</span> $V = (2a + 11) (5a - 12) (a + 6)
$
<span> Rewriting we have:
</span> $V = (10a ^ 2-24a + 55a-132) (a + 6)

V = 10a ^ 3-24a ^ 2 + 55a ^ 2-132a + 60a ^ 2-144a + 330a-792$
<span> Grouping terms of equal degree we have:
</span> $V = 10a ^ 3 + 60a ^ 2 -24a ^ 2 + 55a ^ 2 -132a -144a + 330a-792$
<span> Adding terms of equal degree we have:
</span> $V = 10 ^ 3 + 91a ^ 2 + 54a-792
$
<span> Answer:
the volume of the box is:
All the expressions given.</span>

4 0

2 years ago

Why is it important for scientists to replicate each other’s experiments?

Vilka [71]

Explanation:

to determine if important scientific results are repeatable

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2 years ago

Read 2 more answers

Inthisexperiment,aspringforcewasusedtokeep moving object travelingin a circularpath.The size of a spring force should be proport

poizon [28]

Answer:

By calculation, it can be shown that;

K = $\frac{F_{angular}}{2\times x\times c}$

Whereby for constant K, as ${F_{angular}}$ increases, x also increases.

Explanation:

The experiment set up consisted of the use of a spring force to maintain the object in circular path.

The energy in the spring is given by

$\frac{1}{2}\cdot k\cdot x^2$ .

Rotational kinetic energy = $\frac{1}{2}$ ·I·ω²

Inertia, I = $\frac{1}{2}$ ·m·r²

ω = $\frac{v}{r}$

Substituting gives

Rotational kinetic energy = $\frac{1}{2}$ ·

= $\frac{1}{4}$ ·m· v²

Equating both equations gives

K = $\frac{2\times m\times v^2}{4\times x^{2} }$ = $\frac{1\times m\times v^2}{2\times x^{2} }$

Within the proportionality limit, x ∝ r

therefore we can write x = c·r which gives

$\frac{ m\times v^2}{2\times x\times c\times r }$ = $\frac{v^{2} }{r} \times\frac{m}{2\times x\times c}$

Since $\frac{v^{2} }{r}$ = angular acceleration, α, then

m× $\frac{v^{2} }{r}$ = Angular force

Therefore K = $\frac{F_{angular}}{2\times x\times c}$

Therefore as Force, F increases, x also increases and the size of a spring force should be proportional to the amount of stretch in the spring.

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2 years ago

How can a calculated height be greater than an actual height?

sammy [17]

Answer:

mesuring heigh and weight is important

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2 years ago

A 4,000-kg car traveling at 20m/s hits a wall with a force of 80,000 N and comes to a stop. What was the impact time?

Nookie1986 [14]

Rate of change of momentum = impact force
(m*v-m*u)/t = F
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<span>soo, t = 1 sec</span>

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3 years ago