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Pie
3 years ago
11

Which sampling method subdivides the population into categories sharing similar characteristics and then selects a sample from e

ach​ subdivision?
Choose the correct answer below.
a. Stratified
b. Convenience
c. Systematic
d. Cluster
Physics
1 answer:
V125BC [204]3 years ago
3 0

Answer:

d. Cluster

Explanation:

Cluster sampling is method of sampling in which samples re subdivided into categories sharing similar characteristics and then selects a sample from each​ subdivision. These groups are called clusters.

For equal sample sizes cluster sampling provide less precision than,simple random sampling and stratified sampling. On the other hand when travel costs between clusters are high, cluster sampling is more cost-effective than the other methods.

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First, we need to find the acceleration
F = ma
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the read of the scale during the acceleration is :


mg + ma

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= 1283.4 N

hope this helps
 
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3 years ago
A weightlifter liftsa 1,250-N barbell 2 m in 3 s. how much power was used to lift the barbell?
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Power = Force * Distance/ time
P = 1,250 * 2/3
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3 years ago
A worker drives a 0.562 kg spike into a rail tie with a 2.26 kg sledgehammer. The hammer hits the spike with a speed of 64.4 m/s
zubka84 [21]

Answer:

Explanation:

Given that,

Mass of sledge hammer;

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Vh = 64.4 m/s

The expression fot the kinetic energy of the hammer is,

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K.E(hammer) = ½ × 2.26 × 64.4²

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ΔU = ¼ × K.E(hammer)

∆U = ¼ × 4686.52

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4 0
3 years ago
The diagram below shows a 5.00-kilogram block
bixtya [17]

The name and strength of the force holding the block up is 50 N upward - Normal force.

The given parameters:

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The weight of the block acting downwards due to gravity is calculated as follows;

W = mg

where;

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W = 5 x 10

W = 50 N <em>(</em><em>downwards</em><em>)</em>

Since the block is at rest, an a force equal to the weight of the block must be acting upwards. This force is known as normal reaction.

Fₙ = 50 N <em>(</em><em>upwards</em><em>)</em>

Thus, the name and strength of the force holding the block up is 50 N upward - Normal force.

Learn more about Normal force here: brainly.com/question/14486416

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