00:01
So we have our 4a.
00:03
So take note that we know that mass is equal to volume.
00:07
So mass is equals to volume times density.
00:10
Now the volume of your cylinder, so this would be equal to pi r squared h.
00:17
Your r is the radius of the cylinder.
00:21
We have equal to the diameter divided by two.
00:24
So we have equal to 2 .50 centimeter divided by 2 .2 .2.
00:29
Is equals to 1 .25 centimeter.
00:33
And we have also your height that is height of your cylinder that is 5 .50 centimeter.
00:40
Therefore, the volume of your cylinder is equals to pi r squared h.
00:45
That is pi, 1 .25 centimeter squared times 5 .50 centimeter.
00:53
This should be equal to 27 cubic centimeter, or 207.
00:59
0 .00m.
01:02
So mass of the cylinder of lead, so we're going to use the lead that is equals to the volume times the density.
01:13
So volume times density we have 27 .00ml so times 11 .4 grams per millimeter we have equal to 307 .80 grams.
01:29
Okay.
01:30
Now, 307 .80 or 308.
01:34
So we can use 308 grams times one kilogram is a thousand grams.
01:43
So cancel out.
01:44
So we have 0 .308 kilogram.
01:49
Now we have 308 times.
01:52
We are going to convert this one into pounds.
01:55
So we have 453 .592 grams.
02:00
So this is in grams.
02:01
So we have equal to 0 .68 pounds.
02:06
So our answer here would be 0 .308 kilogram and 0 .68 pounds for 4a.
02:19
Now for 4b, we know that a submerged object displays a volume of liquid equal to the volume of the object...