The nucleus is positive in charge because it contains?

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

Determine the maximum r-value of the polar equation r =3+3 cos 0

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)