What’s the difference between a free safety and a strong safety?

People tell me I should play free safety but not strong safety, is there really a difference?
Thanks!

what differences between the atria and ventricles could u feel with your finger?

1. into what chamber of the heart do the anterior and posterior vena cava open?2. from what chamber does the aorta arise?3. to what structure do the pulmonary arteries lead?4. why does the ductus arteriosus close off at the time of birth?5. what is the funcation of the cornonary circulation?6. What the [...]

What are the differences between these structures and why do they occur?

This is reference to the heart:
Atrial and ventricular walls
Left and right ventricular walls
Bicuspid and tricuspid valves
Aorta and pulmonary arteries
Semi-lunar and tri/bi-cuspid valves
Arteries and veins
Left and right sides of the heart
Blood in the pulmonary artery and the aorta
Pulmonary circulation and systemic circulation

What is the difference between a maximum residue level and a safety limit?

What is the difference between a maximum residue level and a safety limit?
Please answer correctly and I will give the bestest answer 10 points! =D
Thank you muchly!

What is the difference between stage 3 and 4 cancer?

my good friend has cancer of the cervix, she is stage three, she is supposed to have a total hysterectomy coming up real soon but has had chemo and radiation for weeks after a failed chemo and radiation months ago she is a upset and having a hard time scheduling it, probably because she fears [...]

What is the association between smoking and dying of lung cancer?

For cigarette smokers the lung cancer mortality rate = 140 per 100000. For nonsmokers the lung cancer mortality rate = 10 per 100000.
This is a question in my epidemiology class. And we have to interpret the results. Thanks!
We have to calculate the association between smoking adn dying of lung cancer by using [...]

What is the relationship between plantars warts on the feet and cervical cancer?

I read something about the HPV virus that causes plantar warts being connected to increased chances of cervical cancer?! I know HPV as related to genital warts can cause cancer, but if someone has plantar warts, should they be concerned about cancer?

What's the difference between being in remission and being "cancer free?"?

I ran into my old P. E. teacher in the grocery store today and she told me she had breast cancer. She’s doing well now and the DR tells her she’s “cancer free” at this point although not necessarily in remission.
Is there a difference between being in remission and being cancer free?

What's the difference between being cancer-free and being in remission?

My cousin recently received treatment for breast cancer, and now she is “cancer-free. ” But she says she’s not in remission yet. What does this mean exactly?

What's the difference between Cancer Cells and having Cancer?

I just had a biopsy and was told I have cancerous cells in my breast. Is that Breast Cancer?