A person with a mass of 70 kg exerts a force of 60 N when she runs. What is her acceleration?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?