Mechanical waves can travel through

vacuums only

both vacuums and mediums

mediums only

Modify the equation fδt=δ (mv) to find the force of friction.

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

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?