zoejames

What does gravity always do?

The atmospheric concentration of CO2 gas is presently 390 ppm (parts per million, by volume; that is, 390 L of every 106 L of the atmosphere are CO2). What is the mole fraction of the gas in the atmosphere?

A man weighing 70kg carries a 30kg box to the top of the building 20m high. Calculate the work done by the man?

1. A box weighs 45 N. Calculate the work done in lifting the box through a vertical height of 

(a) 4.0m.

(b) 67 cm.

1. How many molecules are there in 1.5 moles of hydrogen sulphide?

Write the units of momentum ?

1. How many kilograms equal 250 grams? (Hint: The conversion you need is in this packet)

2. How many milliliters equal 35 liters? (Hint: The conversion you need is in this packet)

3. Make the following metric conversion:

45 millilitres = __________ meters = __________ centimeters

4. Make the following metric conversion:

6.2 killograms = __________ grams = __________ milligrams

5. In your own words, reflect on how a standardized unit of measurement can benefit global relationships between different nations.

What is real gases??

Convert 13.6 meters to miles