Asolid iron ball of mass 770 kg is used on a building site. the ball is suspended by a rope from a crane. the distance from the point of suspension to the centre of mass of the ball is 12 m.

Heterogeneous mixture with larger particles that never settle is

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve

The diagram shows an example of convection. which label belongs on the arrow? a) warmer water sinks b) warmer water rises c) cooler water sinks d) cooler water rises