Which was not an adaptation that enabled amphibians to live on land? A- Ability to breathe oxygen
B- ability to lay eggs
C- Strong Limbs
D- Thick skin
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Find an expression for the electric field e⃗ at the center of the semicircle. hint: a small piece of arc length δs spans a small angle δθ=δs /r, where r is the radius. express your answer in terms of the variables q, l, unit vectors i^, j^, and appropriate constants.