3 years ago

Why is it important to use placebos and a double-blind approach in some studies

1 answer:

6 0

Another name for these two words is "constant" and you want to have a "constant", because you want something to compare your experimental group to, to see whether data had changed or not. So you have placebos or a double- blind to compare your experimental group to it and also so you know you don't have a bias or anything in the study.

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The length of the assembly decreases by 0.006 in. when an axial a- force is applied by means of rigid end plates. Determine

Triss [41]

Answer:

(a) The magnitude of the applied force is (0.0001524k) Newton

(b) Corresponding stress in the steel core = (0.0001524k/area) Newton per meter square

Explanation:

(a) From Hookes law of elasticity,

Force applied = force constant (k) × compression

compression = 0.006 in = 0.006 × 0.0254 = 0.0001524 meter

Force applied = k × 0.0001524 = (0.0001524k) Newton

(b) Stress = Force applied (Newton)/area of steel core (meter square) = (0.0001524k/area) Newton per meter square

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Liula [17]

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mihalych1998 [28]

For an object moving in a path that's a circle or a part of one,
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3 years ago

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a Ferrari with an initial velocity of 10 m/s, comes to a complete stop in 5 seconds, what will its acceleration be?

11111nata11111 [884]

10 m/s divided by 5 s

-2m/s/s

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