How many centuries would it take for humans originating in Africa to travel to china some 10000 km away? at a rate of 1 km per year.

Heredity has an impact on personal health, but environmental factors are important as well. True or false

In Hypothesis #1, the was intentionally manipulated as the independent variable. In Hypothesis #2, the was intentionally manipulated as the independent variable. The dependent variable measured in both cases was the.

A plasticine ball being dropped onto a metal block. The plasticine ball changes its shape after the impact. 1) Name the force involved during the impact. 2) Explain why the plasticine ball changes its shape after the impact

long-run equilibrium occurs when long-run aggregate supply and aggregate demand meet. What does having long-run equilibrium indicate about a society?

What is one benefit of lifelong physical activity?

A battleship simultaneously fires two shells toward two identical enemy ships. One shell hits ship A, which is close by, and the other hits ship B, which is farther away. The two shells are fired at the same speed.

A horse canters away from its trainer in a straight line, moving 37 m away in 9.1 s. It then turns abruptly and gallops halfway back in 1.8 s. Calculate its average speed for the entire trip. Express your answer using two significant figures.

An early submersible craft for deep-sea exploration was raised and lowered by a cable from a ship. When the craft was stationary, the tension in the cable was 7000 N {/rm N}.

What are the components of earths life support system

A car is moving with a velocity (3.0 m/s) € x ˆ + (1.0 m/s) € y ˆ and 3.0 seconds later its velocity is (6.0 m/s) € x ˆ - (3.0 m/s) € y ˆ. What is the direction of the average acceleration of the car?