Which of the following best describes physical weathering? a A series of chemical changes that wears away at rocks

b The movement of rocks from one area to another

c Any large-scale event such as volcanic eruptions or earthquakes

d A process that breaks down large rocks into smaller pieces

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)

What is friction? how does it affect the motion of an object?