Hovercraft B/C

[Riptide]

If 70% of an unknown solid is submerged in water when floating by itself, what is the density of the solid?

[UTF-8 U+6211 U+662F]

If 70% of an unknown solid is submerged in water when floating by itself, what is the density of the solid?

Answer (Click to Show Hidden Text)

Specific gravity = .7; Density = .7 * 1000 kg/m^3 = 700 kg/m^3

[Riptide]

If 70% of an unknown solid is submerged in water when floating by itself, what is the density of the solid?

Answer (Click to Show Hidden Text)

Specific gravity = .7; Density = .7 * 1000 kg/m^3 = 700 kg/m^3

Nice! Your turn

[UTF-8 U+6211 U+662F]

What is an integrated hovercraft?

[Riptide]

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).

[UTF-8 U+6211 U+662F]

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!

[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?

[Justin72835]

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?

Answer (Click to Show Hidden Text)

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.

[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?

Answer (Click to Show Hidden Text)

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

[mattruff]

Are we allowed do put Lego wheels on the sides of our hovercraft to help the hovercraft roll against the sides ?