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July 16, 2019, 08:36:06 pm

Author Topic: Could someone please explain this question  (Read 85 times)  Share 

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jando

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Could someone please explain this question
« on: July 11, 2019, 01:02:08 pm »
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Hey,

I was wondering if someone could explain this question to me.
The answer is B.

Cheers.

DrDusk

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Re: Could someone please explain this question
« Reply #1 on: July 11, 2019, 05:04:35 pm »
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Hey,

I was wondering if someone could explain this question to me.
The answer is B.

Cheers.
Recall the formula:



Thanks to r1ckworthy for pointing out my mistake in converting Grams to Kg hahaaha
« Last Edit: July 11, 2019, 05:20:22 pm by DrDusk »
UNSW 2019-2023:
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sin(x) = tan(x) = x, for all x

r1ckworthy

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Re: Could someone please explain this question
« Reply #2 on: July 11, 2019, 05:12:52 pm »
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It appears they've made a mistake.
Recall the formula:

In their calculations I think they've forgotten the Pi which gives you the answer of 1.9. The actual answer would be:


Hey DrDusk,
Your conversion for 'm' is wrong, it should be 0.015 kg instead of 0.15 kg, which when I calculated it checks out to B  ;D. Great explanation!
HSC 2019: English Advanced || Mathematics || Mathematics Extension 1 || Physics || Chemistry || Science Extension || Ancient History ||

The Yr12 journey- a diary I "hope" to update... || Send some questions to boost my ego :)

DrDusk

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Re: Could someone please explain this question
« Reply #3 on: July 11, 2019, 05:19:16 pm »
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Hey DrDusk,
Your conversion for 'm' is wrong, it should be 0.015 kg instead of 0.15 kg, which when I calculated it checks out to B  ;D. Great explanation!

Oh god, today I realized how stupid I am lol. I can't even properly convert units  ;D
UNSW 2019-2023:
B.Advanced Science Honours(Adv Physics)/B.Science(Computer Science)


HSC 2018:
Atar aim:  95+ (Achieved)


Very soon to be HSC/Prelim Physics Tutor!

sin(x) = tan(x) = x, for all x

r1ckworthy

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Re: Could someone please explain this question
« Reply #4 on: July 11, 2019, 05:25:46 pm »
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Oh god, today I realized how stupid I am lol. I can't even properly convert units  ;D

Hey, it happens to the best of us ;D
HSC 2019: English Advanced || Mathematics || Mathematics Extension 1 || Physics || Chemistry || Science Extension || Ancient History ||

The Yr12 journey- a diary I "hope" to update... || Send some questions to boost my ego :)