Based on the text, which of the following best describes the effect of Varroa mites on bees? (5 points) a
They destroy the important crops that bees depend on to thrive.
b
They infest the bees' intestines and cause digestive and other health problems.
They make extra work for beekeepers who are fighting to keep hives healthy.
С
d
They threaten the bees directly and introduce viruses and bacteria to the hive.

The Answer is A They destroy the important crops that bees depend on to thrive

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: