Which of the following is the first step in the technological design process? HELP ASAP PLEASE!! due: 11/20/20

A. construct a prototype

B. evaluate the design

C. define a need or problem

D. research existing solutions

Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio