) Ana and Dana were at the beach enjoying the waves. Remembering what they learned in science class, Ana said that the ocean waves were mechanical waves, but Dana said they were electromagnetic waves. Which student is correct and why?
A.
Both of them are right. Ocean waves travel through a medium so it is a mechanical wave. It is also an electromagnetic wave since the particles moves up and down.

B.
Only Ana is right. Ocean waves travel must have a medium to travel through so it is a mechanical wave.

C.
Only Dana is right. In ocean waves the particles move up and down which is the characteristic of an electromagnetic wave. Ocean waves need a medium so it is not a mechanical wave.

D.
Both of them are wrong. Neither ocean waves nor EM waves need a medium.

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

What object a collides with object b and bounces back its final momentum is?

The government has declared that a hurricane is likely to hit the east coast. which government division is part of acf and provides guidance to citizens? a. job opportunities for low-income individuals b. office of human services emergency preparedness and response c. assets for independence d. low-income home energy assistance program