If you weighed 130 pounds on earth, you would weigh on the moon

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

A-4.60 μc charge is moving at a constant speed of 6.80×105 m/s in the +x−direction relative to a reference frame. at the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points.

70 give a real life example showing how sensory neurons work with the motor neurons