Amethane molecule contains 1 atom of carbon. the number 1 represents how many significant figures? a methane molecule contains 1 atom of carbon. the number 1 represents how many significant figures? one two three infinite

Option A: one.

In a number, to determine the number of significant figures following 3 rules are used:  

(1) The digits which are non-zero are always significant.

(2) Any zeros between two digits which are non-zero are significant.

(3) In the decimal portion, trailing zeros are significant.  

The number is 1 carbon atom, it has one non-zero digit.

Therefore, according to rules, there is only 1 significant figure (underlined): 1.

c

explanation:

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied