If 70% of an unknown solid is submerged in water when floating by itself, what is the density of the solid?
Re: Hovercraft B/C
Posted: February 12th, 2018, 6:27 pm
by UTF-8 U+6211 U+662F
Riptide wrote:If 70% of an unknown solid is submerged in water when floating by itself, what is the density of the solid?
Specific gravity = .7; Density = .7 * 1000 kg/m^3 = 700 kg/m^3
Re: Hovercraft B/C
Posted: February 12th, 2018, 6:43 pm
by Riptide
UTF-8 U+6211 U+662F wrote:
Riptide wrote:If 70% of an unknown solid is submerged in water when floating by itself, what is the density of the solid?
Specific gravity = .7; Density = .7 * 1000 kg/m^3 = 700 kg/m^3
Nice! Your turn
Re: Hovercraft B/C
Posted: February 12th, 2018, 6:46 pm
by UTF-8 U+6211 U+662F
What is an integrated hovercraft?
Re: Hovercraft B/C
Posted: February 12th, 2018, 7:53 pm
by Riptide
UTF-8 U+6211 U+662F wrote:What is an integrated hovercraft?
Wasn't too sure on what this could be but it looks like it is a hovercraft in which "only one propeller is used to provide both lift and thrust air". These questions however are no longer a part of hovercraft (fortunately) so no point to really learn these facts or add them to your binder (although questions like these have showed up in an invitational for me earlier this year).
Re: Hovercraft B/C
Posted: February 13th, 2018, 1:47 pm
by UTF-8 U+6211 U+662F
Riptide wrote:
UTF-8 U+6211 U+662F wrote:What is an integrated hovercraft?
Wasn't too sure on what this could be but it looks like it is a hovercraft in which "only one propeller is used to provide both lift and thrust air". These questions however are no longer a part of hovercraft (fortunately) so no point to really learn these facts or add them to your binder (although questions like these have showed up in an invitational for me earlier this year).
Oh whoops, I could've sworn the test section didn't change. Oh well, that's right. Your turn!
Re: Hovercraft B/C
Posted: February 13th, 2018, 4:30 pm
by Riptide
A circle rotates clockwise at 100 rpm and has a constant counterclockwise acceleration of 4 rad/s^2 for 5.5 seconds. What is the angular displacement?
Re: Hovercraft B/C
Posted: February 13th, 2018, 5:53 pm
by Justin72835
Riptide wrote:A circle rotates clockwise at 100 rpm and has a constant counterclockwise acceleration of 4 rad/s^2 for 5.5 seconds. What is the angular displacement?
100 rpm = 10.47 rad/s (multiply by pi/30). Then using rotational kinematics (use the displacement equation), you get an answer of 2.9 rad counterclockwise.
Re: Hovercraft B/C
Posted: February 14th, 2018, 9:54 am
by Riptide
Justin72835 wrote:
Riptide wrote:A circle rotates clockwise at 100 rpm and has a constant counterclockwise acceleration of 4 rad/s^2 for 5.5 seconds. What is the angular displacement?
100 rpm = 10.47 rad/s (multiply by pi/30). Then using rotational kinematics (use the displacement equation), you get an answer of 2.9 rad counterclockwise.
Nicely done! Your turn
Re: Hovercraft B/C
Posted: February 14th, 2018, 12:19 pm
by mattruff
Are we allowed do put Lego wheels on the sides of our hovercraft to help the hovercraft roll against the sides ?