Scientists develop theories to explain natural events. What causes scientists to reject even long-held theories and replace them with newer theories?

A squirrel drops an acorn onto the head of an unsuspecting dog. The acorn falls 4.0m before it lands on the dog. We can ignore air resistance. How many seconds did the acorn fall?

Drag each label to the correct location on the chart. Decide whether each phrase is describing land or water. higher specific heat lower specific heat heats up faster heats up slower cools down faster cools down slower Land Water

What is the acceleration of a ball that is vertically tossed up when it reaches its maximum height?

Match the wave motion with the correct seismic wave. P wave S wave Surface wave A. motion that involves compression and expansion of the material through which it passes; may pass through solids, liquids, and gases B.

Why is the use of an international system of measurement important for science?

A conductor, with outer surface labelled a, contains a cavity, inner surface b. In this cavity there is a conducting sphere of radius r, and surface c. The sphere carries a charge of 1 C, while the conductor a charge of 2 C.

A spring (k = 790 N/m) has a length of 48 cm when zero net force is applied to it. What will its length be when 230 N of force is applied to stretch it? Question 3 options: 3.4 m 0.77 m 3.9 m 0.29 m

Inert gas used to make bright city lights True or False

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

If the graph represents speed what is measured on the x and y axes