Aforce of 20. newtons to the left exerted on a cart for 10. seconds. for what period of time must a 50.-newton force to the right act to produce an impulse of equal magnitude on the cart?

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.