A Class-A 10 mL pipette is supposed to dispense 10.00 mL of water. A lab technician makes three measurements of the volume that the pipette actually dispenses, and obtains volumes of 9.70 mL, 9.69 mL, and 9.71 mL. The pipette is:__________
a) Accurate, but not precise
b) Precise, but not accurate
c) Accurate and precise
d) Neither accurate or precise

Answers

Answer 1

Answer:

d) Neither accurate or precise

Explanation:

Accuracy and precision are critical factors in the experimental procedure. Accuracy can be defined as the amount of uncertainty in the process of measurement in relation to the true value (in this case, 10 mL). On the other hand, precision is an independent feature of the accuracy which indicates the repeatability of the measurement process (in this case, three measures weren't repeated). Therefore, precision indicates the confidence of a particular measurement, while accuracy indicates how close is this value to the real value.


Related Questions

A scientist wants to monitor the amount of acid
precipitation falling into a watershed.
Which tool would be the best Tor the scientist to use?
O A. pH meter
O B. Dissolved oxygen sensor
O C. Satellite images
O D. Bioindicators

Answers

Answer:

A. pH meter

Explanation:

This is because a pH meter measures the acidity of water.

Answer:pH meter

Explanation:

Through which of the following processes are plant communities taking over the ecosystem

Answers

Answer:

Climate disturbance

Explanation:

What causes the earths tides; describe the conditions for the largest tides?

Answers

Answer:

Earth's rotation and the gravitational pull of the sun and moon create tides on our planet. Because the sun is so much larger than the moon (27 million times more masssive), it has a much bigger graviational pull on Earth.

Describe how the gonorrhoea pathogen causes disease after it enter the body

Answers

Answer:

Gonorrhea is transmitted through sexual contact with the penis, vagina, mouth, or anus of an infected partner. Ejaculation does not have to occur for gonorrhea to be transmitted or acquired. Gonorrhea can also be spread perinatally from mother to baby during childbirth.

Where does the water that a land plant uses for photosynthesis come from? The water comes from _____.


-Evaporation
-Condensation
-Precipitation

Answers

Answer:

precipitation

Explanation:

please help asap 10 points screenshot attached

Answers

i did this question in my biology class. ill text u the answers

(for anyone confused, ik him irl)

have a good day :)

which of the following statements about the cells of any multicelluar organisms is true

Answers

Answer The DNA in a cell is all the same

Explanation:

What is the role of helicase in DNA replication?

Answers

Answer:

The helicase is essential because they separate the double-stranded DNA into single strands so that it could be copied.

Hoped this helped!

Which of the following statements is true?
OA. Chemical reactions can either absorb thermal energy or release thermal energy
ОВ.
Chemical reactions can only absorb thermal energy.
OC.
Chemical reactions can neither absorb thermal energy nor release thermal energy.
OD.
Chemical reactions can only release thermal energy.

Answers

I think the answer is A! i might be wrong

Answer: Chemical reactions can either absorb thermal energy or release thermal energy.

The color of a light wave is determined by its wavelength. On the COLOR tab, slowly drag the Light wavelength slider back and forth and observe the effect on oxygen production. How does the color of light affect the rate of photosynthesis

Answers

Answer:

The color of light determines how effective chlorophyll pigment will be at absorbing light.

Explanation:

Photosynthesis is a metabolic process that requires light, which is an electromagnetic radiation. Light on the electromagnetic spectrum is determined by wavelength. Each region/color of light occurs at a specific wavelength.

Hence, chlorophyll pigment, which is the major photosynthetic pigment effectively absorbs blue and red light in the visible light region of the electromagnetic spectrum. Hence, the rate of photosynthesis will be affected negatively if the color of light is not the one stated above.

Use the following table to answer the question:


Element

Mass Number

Atomic Number

Aluminum

27

13

Nitrogen

14

7

Helium

4

2

Fluorine

19

9

please help

Which element has the least neutrons in the nucleus?
Aluminum
Nitrogen
Helium
Fluorine

Answers

Answer:heh

Explanation:

Aluminium , mass no = no of proton + neutron = 27

atomic no = no of proton = 13

no of neutron = 27 - 13 = 14

Nitrogen  , mass no = no of proton + neutron = 14

atomic no = no of proton = 7

no of neutron = 14 - 7 = 7

Helium   , mass no = no of proton + neutron = 4

atomic no = no of proton = 2

no of neutron = 4 - 2= 2

fluorine    , mass no = no of proton + neutron = 19

atomic no = no of proton = 9

no of neutron = 19-9 = 10

Answer:

helium

Explanation:

i took the test and got it right... it also has the smallest number

If I put down an apple next to a banana will it ripen faster?

Answers

Answer:

no

Explanation:

You are monitoring Birch Lake,

Answers

A. Snails and crayfish would not survive in Birch Lake at a pH of 6.2.

B. Once they die out, the walleye will disappear as well.

How many molecules of water are created when making a lipid?

Answers

Answer:

Three molecules

Explanation:

Since fats consist of three fatty acids and a glycerol, they are also called triacyclglycerols or triglycerides. Triacyclglycerols: Triacylglycerol is formed by the joining of three fatty acids to a glycerol backbone in a dehydration reaction. Three molecules of water are released in the process.

Answer: 3 molecules

Explanation: Hope that helps

1. Which of the following is NOT a characteristic of life.
A. Being Multicellular
B. Responsiveness to the Environment
C. Growth and Change
D. Maintain Homeostasis

Answers

Answer:

it may be a or d but b and c are a characteristic in life

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