Which of the following are required for scientific questions a-repeatable b-supportable c-definable d-testable

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending