HELP PLEASEE 1. Tiana is participating in a triathlon and you need to calculate her average speed for all three events. She skates 20km in 1.25 hrs. She paddles a kayak 1km in 0.75 hrs. and she Rides her bike 100kmn in 2 hrs.

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible? a. attractive forces between gas particles are negligible because the particles of an ideal gas are moving so quickly. b. collisions between gas particles are elastic; there is no net gain or loss of kinetic energy. c. gases consist of a large number of small particles, with a lot of space between the particles. d. gas particles are in constant, random motion, and higher kinetic energy means faster movement.

When curium-242 is bombarded with an alpha particle, two products are formed, one of which is a nudge on. what is the other product

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?