Question

HELP!!!

Answer 1

Please type your query in the question box provided instead of saying "HELP".
Not many people are inclined to wait for you to type out the question.
Thanks. :)

Answer 2

(No worries, I'm waiting for you. ^^)

Answer 3

In an effort to reduce the mass of an aluminum bulkhead for a spacecraft, a machinist drills an array of holes in the bulkhead. The bulkhead is a triangular- shaped plate with a base and height of 2.5 m and 1.6 m respectively and a thickness of 7mm. How many 5cm diameter holes must be drilled clear through the bulkhead to reduce its mass by 8kg? for the density of aluminum, used p= 2800 kg/m^3

Answer 4

...Wow, I almost thought that was a Chemistry problem when I saw aluminum.
Lol gimme a sec. :p

Answer 5

First, I solved for the Volume by using the equation for a cylinder V =
(pi)(r^2)(h)

Then, I used the equation W = V * p

I substituted in the actual values to get:
8 = (.000013744)(2800)x

x = the number of holes I will need

After simplifying I got:
8 = .03848x
Then, I solve for x to get 208 holes required.
this is what I did.

Answer 6

... I think I'll just call a pro in.....
@satellite73 ? e_e

Answer 7

(I have a lot of homework due tomorrow. I'm sorry but I really don't have the time to figure this out, although I do know how to do it. D:)

Answer 8

I just need help figuring out the volume of the cylinder after that I got it

Answer 9

You don't know the volume formula for the cylinder or your answer doesn't match the answer key?

Answer 10

I know the volume formula I just don't know what numbers to put in In order to get .000013744

Answer 11

@kittiwitti1

Answer 12

Okay from what I can remember, you're supposed to find the volume of each "cylinder" hole and then divide 8 kg by that....

Answer 13

Yeah but Im stuck in volume part I just need to know what to put as the radius and height but after that I got it. I know the volume needs to equal to .000013744

Answer 14

5cm diameter = 2.5 cm radius

Answer 15

The height would be the 'thickness' since you're drilling clear to the other end.

Answer 16

okay so radius is 2.5 and height 7 because its the thickness right?

Answer 17

@kittiwitti1