Answer:
D. Both Technician A and Technician B are correct.
Explanation:
In electric components, a color code in used on a component to identify their value and function.The value is an electrical value which could be for a resistor or capacitor. For example resistors are coded in ohms.A color code could show the rating of an electric component.For example a tight tolerance resistor will be color coded using three bands.
Answer:
Please select the correct statements concerning use of a centrifuge. (Select all that apply.)
(a) When placing test tubes in the centrifuge, what are the best practices?
- Wait until all positions on the rotor contain a test tube before activating the centrifuge.
- <u>Place test tubes containing approximately equal volumes in opposite positions on the rotor.</u>
- Carefully stopper the test tubes to ensure the liquids do not spill out.
- <u>Never put stoppers or other items in the centrifuge with your tubes</u>.
(b) When operating the centrifuge, students should do which of the following?
- <u>Make sure that the lid is completely shut and the safety knob is turned to engage the safety switch.</u>
- <u>Centrifuge for approximately 30 minutes</u>.
- Centrifuge for approximately 30 seconds.
- Mid-way through the process, open the lid of the centrifuge and check to be sure it is operating.
(c) When the centrifuge process is complete, students should do which of the following?
- <u>Using the eye-hole on top, monitor the spinning rate and open the lid only after the rotor has slowed significantly</u>.
- Immediately open the lid of the centrifuge to remove the test tubes before they are damaged.
- <u>Wait for the rotor to come to a complete stop before attempting to remove your test tubes</u>.
- Reach out and carefully slow the rotor with your hand so you may finish the lab faster.
Explanation:
I UNDERLINED and BOLD the answers that apply
Answer:
shear plane angle Ф = 26.28°
shear strain 2.20
Explanation:
given data
angle = 16°
chip thickness t1 = 0.32 mm
cut yields chip thickness t2 = 0.72 mm
solution
we get here first chip thickness ratio that is
chip thickness ratio = ................. 1
put here value
chip thickness ratio =
chip thickness ratio r = 0.45
so here shear angle will be Ф
tan Ф = ............2
tan Ф =
tan Ф = 0.4938
Ф = 26.28°
and
now we get shear strain that is
shear strain r = cot Ф + tan (Ф - α ) ................3
shear strain r = cot(26.28) + tan (26.28 - 16 )
shear strain r = 2.20
Answer:
1. A.True
2. B.False
3. B.False
4. A.True
5. A.True
6. A.True
7. A.True
8. B.False
9. B.False
10. A.True
11. B.False
12. A.True
13. A.True
14. B.False
15. B.False
16. A.True
Explanation:
Most steels have endurance and fatigue limit about half the Tensile strength. Tensile strength of material is the limit of stress at which material then breaks. The tensile stress in a bolt is calculated through tensile force.
Answer:
10.41 kg
Explanation:
The gas state equation is:
p * V = n * R * T
For this equation we need every value to be in consistent units
1.5 bar = 150 kPa
5 C = 278 K
n = p * V / (R * T)
n = 150000 * 10 / (8.31 * 278) = 649 mol
Multiplying the amount of moles by the molecular weight of the gas we obtain the mass:
m = M * mol
m = 16.04 * 649 = 10410 g = 10.41 kg