A memorial is being planned for a local hero in Hawaii. Which combination of features is most likely to experience the least amount of weathering and erosion?

A.
a memorial made of iron, located in the sea
B.
a memorial made of limestone, located on the sandy seashore
C.
a memorial made of granite, located on the edge of the sea where the waves lap against it
D.
a memorial made of quartz, located a few miles away from the sea

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.