SC Science 2011 MARATHON (2 Viewers)

[knxd]

^Fuu-- where's the question?

Describe the features of a plutonic rock such as granite.

 

[lath]

^Fuu-- where's the question?

Describe the features of a plutonic rock such as granite.

pretty sure that's not an SC type of question

 

[bleakarcher]

Define net force and hence state Newton's second law of motion.

 

[lath]

Define net force and hence state Newton's second law of motion.

net force is the total amount of force acting on an object. Netwons second law of motion states that if a force is applied to an object, it will accelerate, and the rate of acceleration will depend on the mass of the object (force= mass x acceleration)

 

[lath]

define voltage, resistance and current + what is ohm's law (4 marks)

 

[dionb2014]

Had my science exam today.

one question was really ambiguous.

It said meisos and mitosis in one cloumn. Then it said role in another. then it said location in another.

 

[lath]

Had my science exam today.

one question was really ambiguous.

It said meisos and mitosis in one cloumn. Then it said role in another. then it said location in another.

Meiosis - occurs in gametes (sex cells - sperm and egg cells), role is to produce diploid zygote with correct number of chromosomes?
Mitosis - occurs in body cells, role is the repair and growth of cells.

 

[dionb2014]

Yeah I just wrote: mitosis - occurs in cells to replicate and create a full number of chromsomes
meiosis - occurs in sex cells to produce half the number of chromosomes for reproduction and fusion of gametes.

 

[alyssasmirnov]

question: when light strikes matter, state and describe the three things that can happen.

 

[dionb2014]

Reflection, refraction or absorption?

 

[alyssasmirnov]

yep

 

[dionb2014]

Well pretty much the same question has already been asked so I wasn't sure.

 

[bleakarcher]

define voltage, resistance and current + what is ohm's law (4 marks)

Voltage is a measure of electrical pressure within an electric circuit causing the current to flow. It is measured in units of volts.
Resistance is the property of a conductor which restricts the flow of current. It is measured in ohms.
Current is a measure of the flow of electrons throughout an electric circuit. It is measured in amperes or amps.
Ohm's law states that V=IR, where V is voltage, I is current and R is the resistance within an electric circuit.

 

[alyssasmirnov]

oh oops new question: what are two examples of indicators used to measure acidity levels?

 

[dionb2014]

What are the products when copper carbonate is dissolved in water.

 

[lath]

oh oops new question: what are two examples of indicators used to measure acidity levels?

universal indicator + litmus paper

 

[lath]

What are the products when copper carbonate is dissolved in water.

is it copper oxide and hydrogen carbonate?

 

[lath]

what is continental drift?

 

[bleakarcher]

oh oops new question: what are two examples of indicators used to measure acidity levels?

litmus paper and universal indicator lol

 

[girlworld_club]

Voltage is the amount of energy dropped between two points in a circuit, and is measures in volts. Current, is the flow of electrons in a circuit and is measured in amps. Resistance restricts the flow of electrons (current) in a circuit. Resistance is measured in ohms. Ohm's law is V=IR where, V represents voltage, I represents current and R represents resistance. Ohm's law demonstrates the relationship between Voltage, current and resistance.


100% for physics test.