What force is required to accelerate a block of mass 4 kg at 2m/s2 on a surface which has a frictional force of 2n.

Ineed with these last two questions: 1) what are two types of cold air masses that influence the weather in north america? name them and describe their humidity. 2) describe the motion of a cold air mass and a warm air mass and the weather you would expect at a warm front and an occluded front.

Herbivores, carnivores, and omnivores are all types a. decomposers b. producers c. consumers d. biomes

If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?