Which of the following is a good example of a contact force? earth revolving around the sun a bridge suspended by cables a ball falling downward a few seconds after being thrown upward electrically charged hairs on your head repelling each other and standing up nextreset

a bridge suspended by cables

Explanation:

The forces are classified into two.

Contact and non contact force.

1. The contact force is the force when the two bodies are in physical contact to each other.

For example, friction force, muscular force, etc.

2. The non contact force is the force acting between two objects when they are not in physical contact to each other.

For example, magnetic force, gravitational force, coulomb's force, etc.

Here, the cables are in contact to the bridge, so it is the example of contact force.

28. evolution

29. environment, survive, offspring  

explanation:

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.