This 80 kg roller coaster car weighs how many newtons? How much does gravity pull it down?? This 80 kg car is moving at 20 m/sec at the top where the hill's radius is 100m. What is the centrifugal force?

Will it fly off at the top?

This 80 kg car is moving at 40 m/sec at the bottom where the radius is 50m. What's the centrifugal force there?

What's the total force down at the bottom then?

Someone please awnsers all these question!

Zirconium has an hcp crystal structure and a density of 6.51 g/cm3. (a) what is the volume of its unit cell in m3? (b) if the c/a ratio is 1.593, compute the values of c and a.

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.

What is the coldest temperature ever recorded in san antonio?