Hey Hannahtuition Combined Sci students, I will post more of such short questions on my webpage more often from now on. 🙂
Please key in the answers in the comments below. Thanks.
Physics:
- What is the difference between speed and velocity?
- What is the difference between EMF and potential difference?
- What is the difference between resultant force and frictional force?
- What is the difference between force and workdone?
- Do workdone and energy have the same units?
Chemistry:
- What is the difference between boiled water and distilled water at room temperature?
- List the metal reactivity series.
- What are the types of oxides and state 2 examples of each type of oxide.
- What are isotopes?
- What do atoms of elements in the same group have in common?
Thanks. Thats all for this week! 🙂
Physics:
1) speed –> scalar while velocity–> vector
2) EMF–> The total voltage given off by the dry cell while P.D.–> voltage passed from one point to another.
3) Resultant Force –> overall force that acts on the object while Friction Force–> is an opposing force that goes against the direction the object is moving towards to.
4) Work Done has the SI unit of Joules(J) while Force has the SI unit of Newton(N)
5) Both Work Done and Energy have the SI unit, Joules(J)
Chemistry:
1) Distilled water contains Oxygen atoms whereas Boiled water doesn’t.
2) Potassium, Sodium, Lithium, Calcium, Magnesium, Aluminium, Zinc, Iron, Copper, Silver, Gold
3) Basic Oxide –> Sodium Oxide, Magnesium Oxide. Acidic Oxide –> Carbon Dioxide, Sulfer Trioxide. Amphoteric Oxide –> Lead (II) Oxide, Aluminium Oxide. Neutral Oxide –> Water, Carbon monoxide.
4) Isotopes–> similar protons different neutrons
5) The number of electronic shells they have eg. Group 2 elements will all have 2 shells