Calculate: A. What is the specific heat of plastic when 440 Joules of heat are radiated on a 140 gram slab of plastic which changes temperature from 20 -22 oC?

How are elements arranged in a periodic table

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?