Aforce does work on an object if a component of the force: a) is perpendicular to the displacement of the object b) is parallel to the displacement of the object c) perpendicular to the displacement of the object moves the object along a path that returns the object to its starting position d) parallel to the displacement of the object moves the object along a path that returns the object to its starting position

Are aliens real? justify you’re answer.

Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.

What is the increase in density of a medium due to wave travel?