Un electrón es extraído de un metal con una energía cinética de 1,8 eV. Si la función trabajo del metal es el 25% de la energía del fotón incidente, determine la función trabajo del material.

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

Aheavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. when the wind blows hard, the wire hums at its fundamental frequency of 80hz. what is the mass of the sculpture?