A scientist wants to measure the relationship between humidity in
the summer and the number of home runs in baseball. Which of the
following is a testable question about this topic?
O A. Are there more home runs during the more humid months
of the summer?
B. Should fans like the players who hit the most home runs?
O C. Are home runs more fun to watch than normal hits?
D. Are home runs more exciting during the summer?

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:

the closer the planet is to the sun, the larger the gravity

magnets not strong enough

explanation: