Athin metallic spherical shell of radius 50 cm has a total charge of 4.0 µc placed on it. at the center of the shell is placed a point charge of 2.00 µc. what is the electric field at a distance of 30.0 cm from the center of the spherical shell?

This punnett square shows the cross between two pants. one parent has round seeds (rr). and the other parent has wrinkled seeds (rr) which best describes their offspring as shown in this cross?

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600

What is the difference between mass density and weight density?