If displacement is not changing as a function of time then what is velocity

When a star is moving away the light waves appear to be ... Red Blue Green Yellow

A bowling ball has an initial momentum of + 30 kg m/s and hits a stationary bowling pin. After the collision, the bowling ball leaves with a momentum of + 13 kg • m/s.

A 6000 kg train car traveling at 2.5 m/s collides with another 6000 kg train car now they are both moving but with a speed of 1.25m/s.

How are convergent boundaries different from divergent boundaries

Which are causes of mechanical weathering? (check all that apply) A. acid rain B. plant growth C. animal actions D. carbon dioxide E. pressure release I chose B & E and got the question wrong.

What was his average swimming speed during the second half of the race if he tied the record, which was at an average speed of 2.05 m/s?

Objects A and B have equal amounts volumes and are both traveling at 25 miles per hour. Object A is much denser than Object B. Which object has a greater amount of force and why

An airplane with a total mass of 850 kg has an engine malfunction, causing it to provide a constant horizontal force of 4000 N. The pilot, who has a mass of 80 kg, decides to eject from the airplane.

When less force is used but the amount of work done remains the same, how does distance change? A) distance stays the same B) distance increased C) distance decreased D) distance is dependent on the mass of the object

A student pushes a 60-N block across the floor for a distance of 10 m. How much work was done to move the block