A solenoid of length 16 cm consists of closely spaced coils of wire wrapped tightly around a wooden core. The magnetic field strength is 2.5 mT inside the solenoid near its center when a certain current flows through the coils. If the coils of the solenoid are now pulled apart slightly, stretching it to 18 cm without appreciably changing the size of the coils, what does the magnetic field become near the center of the solenoid when the same current flows through the coils

B2 = 2.22mT

Explanation:

See attachment for the calculation.

Assuming the angle the magnetic field makes with the direction of current flow is the same in both cases and that the same current flows in both cases, then F1 = F2

See calculation below.

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.