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2 years ago

Which relationship between sample size and sampling error is correct? Question 36 options:

Physics

1 answer:

KengaRu [80]2 years ago

6 0

Answer: option B

Explanation: The sampling error also known as the marginal error is given mathematically as

Margin of error = critical value × (standard deviation/√n)

Where n = sample size

As we can see from this formulae, the only variable here is the margin of error and the sample size.

Hence margin of error = k/√n

Which implies that there is an inverse relationship between margin of error and sample size.

A large sample size gives a low margin of error while a small sample size gives a large margin of error.

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A 0.500-kg block, starting at rest, slides down a 30.0° incline with static and kinetic friction coefficients of 0.350 and 0.250

Leviafan [203]

Answer:x=23.4 cm

Explanation:

Given

mass of block $m=0.5 kg$

inclination $\theta =30$

coefficient of static friction $\mu =0.35$

coefficient of kinetic friction $\mu _k=0.25$

distance traveled $d=77.3 cm$

spring constant $k=35 N/m$

work done by gravity+work done by friction=Energy stored in Spring

$mg\sin \theta d-\mu _kmg\cos \theta d=\frac{kx^2}{2}$

$mgd\left ( \sin \theta -\mu _k\cos \theta \right )=\frac{kx^2}{2}$

$0.5\times 9.8\times 0.773\left ( \sin 30-0.25\cos 30\right )=\frac{35\times x^2}{2}$

$x=\sqrt{\frac{2\times 0.5\times 9.8\times 0.773(\sin 30-0.25\times \cos 30)}{35}}$

$x=0.234 m$

$x=23.4 cm$

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2 years ago

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san4es73 [151]

Answer:

Explanation:

cuz whenever the ball was traveling up the staircase it was building up energy to use (potential energy) unlike b.

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Romashka [77]

$A_x = 5.0$

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2 years ago

A cat climbs 10 m directly up a tree.

Harman [31]

<span>there is no horizontal displacement if he went straight up

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Genrish500 [490]

The gravitational forces between the Earth and Moon are greatest when the two bodies are closest together. That happens every 27.32 days, when the Moon is at the perigee of its orbit.

Even if this happened at the same time in every orbit, the date would change, because there are not 27.32 days in a month.

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