Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
viniterranova
Group Title
A astronaut has 100 kg of mass. Unfortunately the mass of his body was spread out in a sphere. After that, the density inside the sphere is 2x10^28 kg/m^3. What is the radius of the sphere where the mass of the astronaut was spread out?
 one year ago
 one year ago
viniterranova Group Title
A astronaut has 100 kg of mass. Unfortunately the mass of his body was spread out in a sphere. After that, the density inside the sphere is 2x10^28 kg/m^3. What is the radius of the sphere where the mass of the astronaut was spread out?
 one year ago
 one year ago

This Question is Closed

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
Density = MASS/VOLUME
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
use it to find the volume of the sphere
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
I just set up the following relation 6x10^28=100kg/V
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
Yes u r correct. PLZ CONTINUE
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
So, with some algebric manipulation i found this relation V=1x10^2/6x10^28 and i got V=1/6x10^30.
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
I think this is the volume of the sphere.
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
Now, Volume of a sphere=4/3 pi r^3
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
Use it to find r
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
I just plug it in the formual, right?
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
YEp, 1/6x10^30 = 4/3 pi r^3
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
got it?
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
Just one moment.
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
i got 1,46459
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
But I got different
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
What do you got?
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
i write the equation in this order. cubic root of 1/6x10^30=4/3phi*r
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
Now i got 4,12740906x10^9 m
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
Density= MASS/ VOLUME 2x10^28=100/VOLUME VOLUME=50 * 10 ^28 4/3 pi r^3 = 50 * 10^28 r^3=4923725109
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
That ´s right.
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
r=4923725109
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
How do u calculate the 2x10^28=100/VOLUME. Plz do it step by step.
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
DEnsity =MASS/ VOLUME
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
Now, substitute the given values
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
thanks
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
But sorry i can´t understant how do you calculate 2x10^28=100/VOLUME. May you do it plz?
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
When i calculate V i have found 50/3x10^28. How did you got 50 * 10 ^28. PLz.
 one year ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.2
100/2 =50 right?
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
Yes, but where did you find the number two? If we have the division 100/6?
 one year ago

viniterranova Group TitleBest ResponseYou've already chosen the best response.0
Did you divide 6/3. I got it. now.
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.