Rocket engines can be fueled by liquid hydrogen. The liquid hydrogen reacts with liquid oxygen, producing water vapor and releasing an enormous amount of energy. Consider the following reaction:
2 molecules of hydrogen (H2) react with 1 molecule of oxygen (O2) to produce some amount of water (H2O).

To find the amount of water produced, first determine the number of each type of atom in the products.

Hint: During a chemical reaction, atoms are not created, destroyed, or changed from one chemical element to another.

dishwashers don't have rights

explanation:

dishwashers are meant for one thing and one thing only: dishwashing. they belong in the kitchen making sandwiches and cleaning up for the man of their household. if your dishwasher starts acting up just slap it and wait a minute.

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.