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Re: Metric Mastery B
Posted: March 24th, 2013, 4:07 pm
by mrburrito
Does anyone else find it harder to determine the mass of hollow objects than solid objects.
Re: Metric Mastery B
Posted: March 25th, 2013, 7:08 pm
by hc1220
Honestly? For me, anything mass is hard
all joking aside hollow objects are obviously the hardest as you can't feel it and you have really have no idea if it's not an everyday object.
Re: Metric Mastery B
Posted: March 26th, 2013, 2:54 pm
by justsomedudenamedted
Does anyone know how they might make a station where you have to estimate a length of time? At state they had questions for everything but time... So, I'm just wondering.
Re: Metric Mastery B
Posted: March 26th, 2013, 2:58 pm
by caseyotis
justsomedudenamedted wrote:Does anyone know how they might make a station where you have to estimate a length of time? At state they had questions for everything but time... So, I'm just wondering.
JustDroobles wrote:-274degreesC wrote:In the rules, it says that time is one of the units that could be in competition. So far, I have never seen a competition with this. Can someone give me an example of a time question that might pop up?
When I ran this event I included a station where it was required to measure the period of a pendulum with a stop watch and a station where it was required to measure the length of time for an animated gif to run. The period of a pendulum is constant independent of how high it is swinging. If you are asked to measure a period, remember, it is the time for a full cycle, back and forth.The best way to measure it accurately is to find the time for 10 cycles to complete and then divide the time for 10 cycles by 10.
ali941 wrote:-274degreesC wrote:In the rules, it says that time is one of the units that could be in competition. So far, I have never seen a competition with this. Can someone give me an example of a time question that might pop up?
Estimate the time it takes for (given object) to fall (given distance).
For example, a 1cm cube falling 2 meters. This question was at the Bay Area Regionals.
You should look back in the pages; you might see some helpful advice or tips.
Re: Metric Mastery B
Posted: March 26th, 2013, 6:34 pm
by ali941
sofan wrote:NEED A LOT OF HELP!!!!!!
My school is going to state and I volunteered for Metric Mastery because nobody else would.
1st: What do I do.
2nd: Can I please have tips.
Thanks
I would also suggest practicing with your partner, getting to know who does better on what types of measurements. My partner and I bounce ideas off of each other, and if we disagree, I just average our guesses. This is pretty close most of the time. As suggested earlier, measure common objects, but also estimate then measure random objects with unusual tools like carpenter rulers, tapes, displacement cylinders, etc. All you have to do is practice. Good luck!
Re: Metric Mastery B
Posted: March 27th, 2013, 3:55 pm
by hscmom
estimating time...
Imagine anything that has a rate or a period to it. We've practiced estimating the speed of a toy (not a wind up one that would slow down, but one with a switch that goes a fairly constant speed), the period of a pendulum, the distance in time between two beeps, and the rate of flow of a sink, how fast the microwave turntable spins.
Did anyone see BC in the funnies today (look for the one for march 27, 2013)? OH and March 29 is metric too!
http://www.gocomics.com/bc
Re: Metric Mastery B
Posted: April 8th, 2013, 5:51 pm
by mrburrito
At my state tournament, there was a pendulum, and the directions said to measure the time it took for it to swing back and forth, but didn't specify from where it would be dropped from. We assumed from the highest point, but it was impossible to swing it from there. Any advice on what to do for that in the future?
Re: Metric Mastery B
Posted: April 8th, 2013, 6:08 pm
by crazyhorse
The time it takes a pendulum to swing back and forth does not depend on the height, or angle that is was released from, it depends only on the length. If you held it 45 degrees from vertical, or 90 degrees from vertical, the time would be the same.
Re: Metric Mastery B
Posted: April 9th, 2013, 4:11 pm
by mrburrito
crazyhorse wrote:The time it takes a pendulum to swing back and forth does not depend on the height, or angle that is was released from, it depends only on the length. If you held it 45 degrees from vertical, or 90 degrees from vertical, the time would be the same.
Okay, thanks for that.
Re: Metric Mastery B
Posted: April 10th, 2013, 5:59 am
by hscmom
crazyhorse wrote:The time it takes a pendulum to swing back and forth does not depend on the height, or angle that is was released from, it depends only on the length. If you held it 45 degrees from vertical, or 90 degrees from vertical, the time would be the same.
Well, it does also depend on the planet that you're on.
Anyway, it's not hard to estimate or measure a pendulum's period (which is the amount of time it takes to do a complete back and forth).