Block A is 45 km from Block B. Spring and Autumn start moving from Block A to Block B. Spring cycles 15 km/h and Autumn walks 6 km/h. After arriving at B, spring stays there for 1 hour and comes back. Then he meets autumn in between. How far is it from their meeting place to B

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f

Is a volume of space that is empty of matter.

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.