Write an essay about whether it's better to volunteer with an environmental group in your community or a national group.

Volunteering not only makes an impact on the greater community, but it impacts your family and friends directly. If you have children, this is a great teaching and mentoring experience for them. If you can, do your best to find volunteer opportunities that you can bring your kids to, where they too can volunteer and help. This will teach them that giving back is not only the right thing to do, but helping others and the environment is investing in their future. It’s also a nice opportunity to create group volunteer events, which you and your friends can participate in to make an even bigger impact. With social media being so ubiquitous these days, group volunteering with friends can spread like wildfire across networks, which will create a positive word of mouth on the volunteer experience and organization for you and your friends.

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:

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