a porter csn carry 40 bricks of 10n load of each . he can carry up to 75 min in 40 sec . calculate his power​

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

What is the temperature in degrees celsius of a substance with a tempature of 49k

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.