Physical science
question 11
an object of mass 2 kilograms is falling freely near earth's surface. which of the following options best approximates the magnitude of the gravitational force that earth exerts on the object?
a
0.0 n

b
0.2 n

c
2 n

d
20 n

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules

Give one example of a pure (exact) number and of an estimated (measured) number.

In the haber reaction, patented by german chemist fritz haber in 1908, dinitrogen gas combines with dihydrogen gas to produce gaseous ammonia. this reaction is now the first step taken to make most of the world's fertilizer. suppose a chemical engineer studying a new catalyst for the haber reaction finds that 671 liters per second of dinitrogen are consumed when the reaction is run at 271c and 0.99atm. calculate the rate at which ammonia is being produced. give your answer in kilograms per second. round your answer to significant digits.