For the reaction shown below, which statement is correct? ba(oh)2 + 8h20 + 2nh4no3 + heat ? 10h2o + 2nh3 + ba(no3)2 a. the products contain more energy. b. the reactants contain more energy. c. the reactants and products must contain the same amount of energy. d. it is not possible to tell whether the reactants or products contain more energy.

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented.b)scientists had not completely finalized their results, which took 30 years.c)cigarettes were cheaply available and media channels were very inefficient.d)cigarette manufacturers were trying hard to bring an alternative into the market

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.