What is the term for a reaction where energy is released?.
A - fusion
B - endothermic
C - sublimation
D - exothermic

Which of the following is not am example of a polymer? protein nylon kevlar concreta

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

3. a particle with initial velocity v⃗ 0=(5.85×103m/s)j^ enters a region of uniform electric and magnetic fields. the magnetic field in the region is b⃗ =−(1.35t)k^. you can ignore the weight of the particle. a. calculate the magnitude of the electric field in the region if the particle is to pass through undeflected, for a particle of charge +0.640 nc.