Fossils have been found on two continents that are split apart, this is evidence that?

A. There was a bridge

B. The Continents were once joined together

C. The life just appeared in two locations independently

D. They swam across the ocean

Which would increase the reaction rate? Check all that apply. A. Raising the temperature B. Stirring the reaction C. Raising the activation energy D. Adding a catalyst

Two boat landings are 6 km apart on the same bank of a stream that flows at 2.3 km/h. A motorboat makes the round trip between the two landings in 50 minutes. What is the speed of the boat relative to the water?

Why is length not a property of an object

Your favorite radio station is 106.7. What are the units on this number and what do they mean in terms of harmonic motion?

How much work is done when a 48-kg stack of books are lifted 2m with a net force of 25 N? A. 12.4 J B. 100 J C. 50 J D. 96 J ... ?

Creates clouds, snow, sleet, rain and hail

Which type of radiation consists of a fast stream of negatively charged particles? a. alpha particles b. beta particles c. gamma rays d. positron particles

Range of motion is the distance an object can travel when separated from another object. T/F

If 500 thousand btus of energy are available to raise the temperature of a water boiler from 20°f to 100°f, how many gallons of water can be added to the boiler?

A woman pushes a 27 kg lawnmower at a steady speed. She exerts a 180 N force in a direction 31 degrees below the horizontal. The acceleration of gravity is 9.8 m/^2 Find the magnitude of the vertical force this lawnmower exerts on the lawn.