You shoot a free particle into a barrier of height U. The particle's kinetic energy is less than U. What will increase the chances of finding the particle on the opposite side of the barrier? a. Decreasing the mass
b. Increasing the mass
c. Decreasing the difference between the barrier height U, and the kinetic energy
d. Decreasing the barrier width

Kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energy b. motion energy c. sound energy d. thermal energy

Which branches of natural science include the study of an organism that lived 10 million years ago

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".