How many neutrons does 6329Cu atom contain?

An airplane travels at 400 m/s for 20 seconds and then at 250 m/s for 10000 meters. What is the average speed (in meter/second) for the trip?

A car increases its speed uniformly from 40 m/s to 80 m/s while traveling for 10 seconds. What is its acceleration (in m/s²) during this time?

A Boeing 747 airliner, initially at rest, undergoes a constant acceleration of 10 m/s² down the runway for 20 second before it lifts off. How far (in meter) does it travel down the runway before taking off?

A Boeing 747 airliner, initially at rest, undergoes a constant acceleration of 10 m/s² down the runway for 20 second before it lifts off. How fast (in meter/second) does it travel down the runway before taking off?

You drive your car at a speed of 20 m/s, when you suddenly see a cat step into the road. You hit the brakes hard to get a maximum deceleration of 10 m/s². How far (in meter) will you go before stopping?

You drive your car at a speed of 20 m/s, when you suddenly see a cat step into the road. You hit the brakes hard to get a maximum deceleration of 10 m/s². How long (in second) will you go before stopping?

A sky walker jumps out of a helicopter at a height of 1960 meters. How long (in second) will he go down in the air before reaching the ground?

A sky walker jumps out of a helicopter at a height of 1960 meters. How fast (in meter/second) will he go down in the air when reaching the ground?

A ball at rest drops from the top of a building. It strikes the ground after 2 seconds. How high (in meter) is the building?