The mass of a measuring cylinder is 190 g. 400 cm3
of liquid is put into the measuring cylinder.
The total mass of the measuring cylinder and the liquid is 560g.
Four solid objects are lowered in turn into the liquid. The densities of the objects are shown.
1 0.40 g / cm3
2 0.90 g / cm3
3 1.2 g / cm3
4 2.7 g / cm3
Which objects will float in the liquid?

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat