How much pressure is concrete pillar on the base when the concrete pile mass is 2.3 tones and the contact area is 2500

Alightning strike consists of charge moving from a cloud to the ground . in one particular case, the electrons in a lightning strike are confined to travel within a radius of 1.5 m and to move at a speed of 5.0 x 10 m/s. if the density of electrons in the strike is 10'15 electrons/m what current is carried by the lightning ?

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain