If bohr said there are two electrons in the first shell then how many electrons would there be in the first shell of an atom according to the modern atomic theory? another person said that bohr's model was correct then he said more than 2 which is a contradiction.
a. 0
b. 2
c. more than 2
d. it would depend on the element.

Which one of the following research methods can show cause and effect

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.