Physics Middle School

A student is measuring the circumferences of pine trees for an experiment.
She measures 50 trees using a ruler that measures to the nearest centimeter.
Which statement describes a change that could help improve the results of
her experiment?
A. Her measurements will be more precise if she measures an
additional 50 trees.
B. Her measurements will be more accurate if she uses a cloth tape
measure instead of a ruler.
C. Her measurements will be more precise if she uses a cloth tape
measure instead of a ruler.
D. Her measurements will be more accurate if she measures an
additional 50 trees.

Answers

Answer 1

Answer:

B and C

Explanation:

The student's measurement would be more accurate if she can measure an additional 100 caterpillars and be more precise if she uses a ruler that measures to the nearest millimeter.

Accuracy refers to the closeness of measurement or group of measurements to the true value while precision is the closeness of repeated measurements.

The accuracy of a measurement is increased by increasing the number of sample measurements. The more the sample measurements, the lesser the deviation of the mean from the true value.

The precision of a measurement is increased by being able to measure small differences. Hence, a ruler that measures to the nearest millimeter would be more precise than a ruler that can only measure in centimeter.

The correct option is B and C.

Answer 2

Answer:

Explanation: her measurement will be more accurate if she uses a cloth tape measure instead of a ruler

Related Questions

What are fossil fuels composed of? 1.Carbon 2.Nitrogen 3.Oxygen

Answers

Answer:

fossil fuels are composed of Carbon.

Answer: Carbon

Explanation:

What has to happen for these atoms/molecules to change from one state of matter to another? *view attachment*

Answers

Answer:Thermal energy is added or transferred

Explanation:

The answer is the third option

A parking lot is going to be 40 m wide and 100 m long. Which dimensions
could be used for a scale model of the lot?
A. 10 cm x 25 cm
B. 100 cm x 300 m
O C. 75 in x 225 cm
D. 25 cm x 75 cm


Answers

Answer: A

Explanation: You need to find the dimensions of the scale model of the lot that can be multiplied equally to get the original length. Basically 40 m and 100 m need to be divided by the same number to make the scale model evenly, and right off the bat you see that 10 and 25 could be multiplied by 4 and equal the original numbers. Hope this helps! Also sorry if it was kinda hard to understand lol, when i explain things its hard to get out of my own head ;P
answer is A. 10cm by 25 cm

The forces exerted on an object are shown. A box has an arrow pointing right labeled F shown and an arrow pointing left labeled 8 N. If the object moves left, which statement is correct about force F?

Answers

Answer:

force F is weaker than force N

Answer:

its less then 8 N :)

What converts organic remains into fossil fuels? 1.chemical reaction 2water 3.heat and pressure

Answers

Answer:

Heat and pressure

Explanation:

Pressure and heat I took the quiz
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