The density of a gas is 1.25 grams/liter. which of the following is correct to convert the density of the gas to ounce/milliliter? [1 gram = 0.04 ounce, 1 liter = 1,000 milliliter] multiply 1.25 by 0.04 and divide the result obtained by 1,000 divide 1.25 by 0.04 and multiply the result obtained by 1,000 divide 1.25 by the product of 0.04 and 1,000 multiply the numbers 1.25, 0.04, and 1,000

Hi!

The correct option would be: Multiply 1.25 by 0.04 and divide the result obtained by 1,000

As we know 1g contains 0.04 oz, 1.25g will contain:

1.25 x 0.04

= 0.05 oz

We know 1L contains 1000mL, and as we are given only 1L, we can substitute the value of 1000mL in place of liter.

The rule for conversion is that when converting a larger unit to smaller unit, you multiply. As milliliter is the smaller unit, and liter is the larger unit, we multiply the denominator (which is 1) by 1000 to obtain 1000mL.

When converting a smaller unit to a larger unit, you need to divide. As grams is smaller than ounce, we divide the value of grams BUT with the number of grams in an ounce (28) not by the number of ounce in a gram (0.04).

Hope this helps!

(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