At what time t1 does the block come back to its original equilibrium position (x=0) for the first time? express your answer in terms of some or all of the variables: a, k, and m.

Ineed with these last two questions: 1) what are two types of cold air masses that influence the weather in north america? name them and describe their humidity. 2) describe the motion of a cold air mass and a warm air mass and the weather you would expect at a warm front and an occluded front.

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat