The images of d-day show soldiers wading through water to reach the shore. imagine you were an astronomer eisenhower to plan d-day.
should the invasion occur during high tide or low tide? explain.
how could an astronomer advise eisenhower about the tides?

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.