What’s the net force of a box with 60n left and 20n right

Under normal temperature and pressure conditions, what type of rock could be formed from weathering in erosion of metamorphic rock

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

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?