Which of the following is a good example of a contact force? A. Earth revolving around the Sun B. a bridge suspended by cables C. a ball falling downward a few seconds after being thrown upward D. electrically charged hairs on your head repelling each other and standing up

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Explain what happens at the saturation point when adding salt to water at room temperature.

According to valence bond theory, which orbitals overlap in the formation of the bond in hf according to valence bond theory, which orbitals overlap in the formation of the bond in hf 2s on h and 2p on f 1s on h and 2s on f 1s on h and 1p on f 1s on h and 2p on f 1s on h and 3p on f