Which of the following would change a boat's center of gravity?

a. change the material it is made from

b. put a small cabin directly over the current center of gravity

c. add two small anchors on the outside middle of the boat, one on starboard (right), one on port (left)

d. lengthen the mast (the large pole that holds the sail), which is located on the back of the boat

Blank liquids and gases exert a buoyant force on objects placed in them

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?