A block attached to an ideal spring oscillates horizontally with a frequency of 2.0 Hz and amplitude of 0.25 m. The spring constant is 75
What is the mass of the block?

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?

How can waves travel through ground?