The half life of radon is 3.8 days what would be its decay constant?

Which of the following statements are true of solids? a. the particles do not vibrate. b. the particles are in a fixed location. c. they have strong intermolecular forces between the atoms or molecules. d. the particles have less kinetic energy than those of liquids or gases.

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?