Biology
What is negative feedback?
A response that triggers the stimulus to stop
What is common between all elements in group 14?
They have 4 valence electrons
In sound 1 there are three waves per meter.
In sound 2 there are 2 waves per meter.
Which sound has a larger wavelength
Sound 2
sensory-inter-motor
Who won the state of Origin last night
UP THE MAROOONS
What happens to the body after vasodilation (expansion of capillaries)
The body cools down - heat escapes through skin
My reactants weigh 42g and produce two products. If I have 32g of Product 1, how much of product 2 is there?
10g because conservation of mass
What form of heat transfer occurs in liquids and gasses circulating
convection
How does a fibre optic cable work?
total internal reflection transmitting light long distances. 2 substances of different n values
What is the color associated with pentacost
Red
The part of the body acting as the effector in a reflex arc after touching a hot plate
muscles
The word equation for combustion of Copper
Copper + Oxygen -> Carbon Dioxide + Water
Define critical angle
The angle in which no light will be refracted and all will be internally reflected
What does a convering lens do?
focuses light on one specific spot
To the nearest 10000, what is canberras population
400,000
List two ways the CNS differs from endocrine?
. CNS uses electric signals vs chemical
. CNS is rapid, Endocrine is slow.
. CNS neurons, Endocrine organs
Upon mixing two substances I notice a significant decrease in temperature. What does this tell me about the reaction AND the energy levels of products vs reactants.
Endothermic - the reactants have more energy thus required energy to be put into the reaction
What is the second most energetic classification of waves in the EMS
X-Ray
The order of the EMS
Radio-micro-infrared-visbile-UV-X-ray-gamma
What animal is Macropus rufus
Red Kangaroo
Which type of neuron is non-myelinated
interneuron
Carbonate (CO2) (neg 3 charge) ionically binds to Magnesium (+2) charge.
What will the ionic formula be?
Mg3(CO2)2
If sound travels 1600 metres in 5 seconds. What is the speed of that sound
320m/s
Radiation through space, convection in atomosphere, atmosphere, radiation + conduction roof to car interior
In what year was Canberra named the capital + the foundation stone laid?