Answer:
A) Since the confidence interval is not entirely above 0.5, there does not appear to be sufficient evidence that touch therapists can select the correct hand by sensing energy fields.
Explanation:
See answer, it actually doubles as explaination.
Answer:
Ratio D/h of minimum viewing distance to screen height is 16.28
Explanation:
Given the data in the question;
Rayleigh criterion sin = 1.22 λ/D
D is diameter (5.12 mm) = 5.12 × 10⁻³
λ is wavelength ( 537 nm) = 537 × 10⁻⁹ m
so we substitute
sin = 1.22 × 537 × 10⁻⁹ / 5.12 × 10⁻³
sin = 655.14 × 10⁻⁹ / 5.12 × 10⁻³
sin = 0.000127957
= sin⁻¹ ( 0.000127957 )
= 0.007331°
now, tan = y/D
y = h/480
so
tan = h/480 / D
h/D = 480 × tan
D/h = 1 / ( 480 × tan )
we substitute in value of
D/h = 1 / ( 480 × tan( 0.007331° ) )
D/h = 1 / ( 480 × 0.00012795 )
D/h = 1 / 0.061416
D/h = 16.28
Therefore, Ratio D/h of minimum viewing distance to screen height is 16.28
A device that minimizes heat transfer is thermos. Technical name is vacuum flask.
<u>Explanation:</u>
Thermos is a bottle in which vacuum separates it from the surrounding. When the bottle is surrounded by the vacuum, there is a significant minimization in conduction.
The only part that having point of contact with the bottle inside is the thing which holds it in respective place. But there will be a small piece of contact, which will make the inner bottle to conduct heat to a small extent.