Describe how the different penguins interacted with their environment.

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.