You and a friend stand still on an escalator. a stationary observer sees you moving at a speed of 0.35 m/s. from your frame of reference, what is the speed of your friend?

Stars x and y are both bluish main sequence stars. star x has a higher absolute brightness than star y. how do the two stars compare? explain

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

What are atoms of the same element with varying number of neutrons