a light signal is sent from the origin of a system k at t-0 to the point x = 3 m, y = 5 m and に10 m. a) at what time t is the signal received? b) find (x, y, z', t) for the receipt of the signal in a frame k' that is moving along the x axis of k at a speed of 0.8c. (6 points)

When fat comes in contact with sodium hydroxide, it produces soap and glycerin. determine whether this is a physical change or a chemical change. explain your answer

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e