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9966 [12]
3 years ago
6

You and your lab partner, Mel, are engrossed in a chemistry activity using beans to compute the average atomic mass of an elemen

t "beanium". You have three isotopes of beanium to measure. Using a triple beam balance, you find the mass of each isotope three times and then take an average. You and Mel compute an average mass for beanium of 8.93 grams and your percent error is 18%. Your teacher instructs you to try again and you end up with the same results. In fact, no matter how many times you try, your percent error is between 18 - 20%.
What is the MOST LIKELY source of error in this activity?

A) random error: Mel misreads the balance occassionally.
B) random error: You and Mel take turns reading the balance and do not read it to the same accuracy.
C) systematic error: The balance is not calibrated accurately, resulting in inaccurate measurements.
D) systematic error: Every now and then you or Mel stop to chat with your neighbors and lose track of what you are doing.
Physics
2 answers:
Vikentia [17]3 years ago
5 0

Answer:

C:

Explanation:

either C or A but A seems unlikely after multiple attempts. Although the question doesn't make it clear whether the balance is electric either way it could be wrong in someway and seems to be the most likely.

spin [16.1K]3 years ago
5 0

Answer:

The answer is C

Explanation:

I pretty sure it is correct

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Answer:

C. both a speed and a direction

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two ice skaters push each other, and move in opposite directions. the mass of one is 75 kg, and his speed is 2 m/s. if the mass
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momentum conservation

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7 0
3 years ago
When the tympanic membrane vibrates with the same frequency as the incoming sound waves it is known asamplitude.pitch.hertz.reso
Sphinxa [80]
<h2>Answer: Resonance </h2>

Resonance is a phenomenon that occurs when a body capable of vibrating is subjected to the action of a periodic force, whose frequency of vibration approaches the characteristic frequency of vibration (called resonance frequence) of said body. This is due a relatively small force applied in a repeated form, causing the amplitude of the oscillating system to become very large.

In other words, for the specific case of sound waves, this phenomenon occurs when the frequency of the  wave that is external to the system or body coincides with the resonance frequency (characteristic frequency that reaches the maximum degree of oscillation) of this system or body.

In these circumstances the body vibrates, progressively increasing the amplitude of movement after each successive actions of the force. However, this effect can be destructive in some rigid materials.

4 0
3 years ago
A truck is carrying a refrigerator as shown in the figure. The height of the refrigerator is 158.0 cm, the width is 60.0 cm. The
Arada [10]

The maximum acceleration the truck can have so that the refrigerator does not tip over is 4.15 m/s².

<h3>What will be the maximum acceleration of the truck to avoid tipping over?</h3>

The maximum acceleration is obtained by taking clockwise moments about the tipping point of rotation.

Clockwise moment = Anticlockwise moment

Ft * 1.58 m = F * 0.67 m

where

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  • F is weight = mass * acceleration due to gravity, g

m * a * 1.58 = m * 9.81 * 0.67

a = 4.15 m/s²

The maximum acceleration the truck can have so that the refrigerator does not tip over is 4.15 m/s².

In conclusion, the acceleration of the truck is found by taking moments about the tipping point.

Learn more about moments of forces at: brainly.com/question/27282169

#SPJ1

3 0
1 year ago
(HELP!! 10pts) a train travels 75km in 1hr, and then 68km in 2hrs. what is its average speed?
blondinia [14]
Average speed = total distance travelled ÷ total time taken

AS = (75km + 68km) ÷ (1hr + 2hr)

As = 143km ÷ 3hr

AS = 47.66667 km/hr

AS = 47.7 km/hr (3sf)
8 0
3 years ago
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