A small, 3kg weight is moved from 5m from the ground to 8m. What is the change in potential energy

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.

How does an observation about an object differ from an inference about that object

What are the similarities & differences between a thermistor and a light dependent resistor in physics?