A 1.3-kg block is pushed up against a stationary spring, compressing it a distance of 4.2 cm. When the block is released,
the spring pushes it away across a frictionless
horizontal surface. What is the speed of the block, given
that the spring constant of the spring is 1400 N/m?

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

7. see worksheet 1 for values of variables x1, x2 and x3 and answer the following questions: a. for each variable find the mean, median, coefficient of skewness, range and population standard deviation. b. compared to variable x1, how are the mean and median affected by extreme values (outliers) seen in x2 and x3. c. is the median or mean the better measure of location for x2 and x3? explain. d. explain the differences in the magnitudes of the skewness coefficients for the three variables. e. what is the relationship between the range and standard deviation looking across the three variables?