rain causing streams to flood would be an example of interaction between which to spheres

a. hydrosphere and geosphere

b. hydrosphere and atmosphere

c. atmosphere and cryosphere

d. biosphere and hydrosphere

1) a child holds two dogs on two separate leads. the dogs are pulling in different directions. one is pulling a force of 20n north and one is pulling 15n eastwards. calculate the resultant force on the child. state the direction. (use the parallelogram of forces) 2) a force of 20n acts horizontally on an object. a second force of 5n acts at 60 degrees to the first one. calculate the resultant force. worth 20 points, need answers asap with method you x