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Research question: how does power of sound influence the loudness(dB) of sound.

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Research question：When a car is climbing up a steep slope, how can we be sure about if its engine can provide enough force to support this motion?

Topic: The relationship between force generated by the engine of a car when it travels up of a slope and the inclined angle of the slope.

Apparatus: Spring dynamometer

A car

Track

A few books to change the inclined angle of the slope

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topic:The relationship between the buoyancy and the submarine
question:How can a submarine suspend in the water?

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topic: buoyant force and density
Research question:what is the best concentration of salt water for an egg to float
Apparatus: egg
salt
pure water
beaker
measuring cylinder
weighing device

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Name of experiment :
What’s the difference between Static friction coefficient and kinetic friction coefficient ?
Apparatus :
two 50g weights ; a box ; a piece of glasses ; a piece of wood ; Coefficient of Friction Tester ; Spring dynamometer ; a second chronograph ; ruler ; word mobile ; excel mobile ; actor ,camera .

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research question: How to control the friction in order to utilize it.

Topic: the factors which can affect the friction.

Apparatus:
an incline, a cuboid which the mass is already known , two cars of different masses, a big towel, motion detector

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Investigation Topic: Projectile motion

Investigation Question: How relationship of acceleration
n, displacement and thermal velocity of projectile motion depends on the initial force(velocity)?

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buoyancy and density
What factors will effect the position of an object in water.
1 ball
dynamo meter
cup
salt
paper

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Aim: find the relationship between spring's length after elastic and the mass of objects on spring.

(1)5 pieces of 8cm spring
(2)5 small balls with radians 2  cm and different mass(50g,100g,200g,300g,400g)

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Topic: How does movable pulley differ from fixed pulley?
Apparatus:Screw, pulleys, rope, plank, small box to put the objects, a dynameter

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Topic:component force and net force
apparatus:paper,spring-loaded thrust meter,ruler ,rubber band,boardthread.

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Topic: relationship between temperature and drag force.

Apparatus: A 200ml cylinder, a small metal ball, a stopwatch, hot water and ice.

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Topic:.density and buoyancy
Research question:how buoyancy varies from density
Appartus:
five balls with same volume but different density(capable to put into a cylinder,lighter than 1kg)
spring dynomometer
beaker

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Topic: Initial velocity and the stopping distance.

Question:
The relationship between the initial velocity and stopping distance of a car.

Equipment:
A toy car
A track slope which can change distance or height
A metre ruler
A light gate

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the factors which can change the friction force

a car
weights
ruler

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Topic：
Investimate  the Lever principle
Question:
What is the relationship between the effort arm and resistance when both arm are not in the same horizontal line. How to make the lever has more michanical advantages.
Equation:
L1*F1=L2*F2
Sin cos tan
MA=FB/FA=a/b
Equipments:
1.Some wood rules
2.Different mass objects
(20kg 30kg 40kg 50kg 80kg 100kg)
3.A dynameter 4.A fulcrum

Also I am confused about the different types lever have the different mechanical advantages.  So if change the effort arm and resistance arm in different angles, how much will change in the mechanical advantage.Question 2: to what extent change the efffort arm and resistance arm will have the influence in the change in mechanical advantage.

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topic： differencethe static fricition coefficient and kinetic friction coefficient
apparatus ：
a box ；two 50g weights ；a piece of glasses ；a piece of wood ；coefficient of friction tester ；spring dynamometer ；a second chronograph ；a computer；word mobile；excel mobile ；actor

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topic:loudness of sound
research question: how loudness of sound is effected by distance between the source and where we get it.
apparatus：
a source of sound which it's amplitude and wavelength can be controlled.
a sound sensor
a long meter http://upsilonaudio.com/wp-content/uploads/2013/06/Loudness-Its-Definition-Measurement-and-Calculation.pdf
http://101.96.10.64/scitation.aip.org/docserver/fulltext/asa/journal/jasa/85/S1/1.2026633.pdf?expires=1479725526&id=id&accname=guest&checksum=AC9A2B45F42196FDDF51BF3B361B169A

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Slope
Research Question:
When a car is driving on the slope,the car needs more power from the engine to pull the car upwards than it is on a horizontal road.Why it needs more power and how much more power does the engine need ?

Equipment:
A track
A car
The machine which can measure the velocity.

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Double click and write your name in the header and then type your topic of interest and research question you intend to explore...Also add the probable apparatus that you intend to use..Use the following guide from IB to cite your resource and the following link to MLA citation rules
http://library.concordia.ca/help/citing/mla.php?guid=intro