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Tuition Center Singapore JC Chemistry Tuition – Gases   The pressure rating of a car tire is typically given to be 210 kPa. This is based on an internal air temperature of 25°C. A driver decides to inflate the tires of his car to the rated pressure after driving at a high speed for some time, during which the internal air temperature has risen to 40°C. What will be the drop in pressure in each tire when the temperature has returned to 25°C? A       9.3 kPa                  B       10.1 kPa             C     78.8 kPa              D      200 kP   Answer B Since V, n, R remains constant, P1/ T1= p2 / T2 210 / (40 + 273) = p2 / (25 + 273) p2 = 199.3 kPa Drop in pressure = 210 –199.9 =10.1 kPa   Please contact Angie @ 96790479 or Mr Ong @ 98639633 if you need tuition ...

Tuition Center Singapore Math Tuition – Modulus Functions and Graph   Question Answer (i) q = 3 (ii) p =5   Please contact Angie @ 96790479 or Mr Ong @ 98639633 if you need full worked solution  

Tuition Center Singapore Maths Tuition – Single Fraction, in its Simplest Form   If you need help in Secondary 1 to Secondary 4 Mathematics, please contact Angie @96790479 or Mr Ong @ 98639633    

Tuition Center Singapore Biology Tuition – Cell Structure and Organisation    Common Error 1 Since cell walls are rigid, they should be impermeable. Correct Concept 1 The rigidity of a structure is not indicative of its permeability. The rigidity of cell walls is useful in maintaining the turgidity of plants and preventing the bursting of the cell.   Common Error 2 Cells are the same as molecules Correct Concept 2 Cells are not the same as molecules. In fact, cells (living) are made up of non-living molecules. The relative sizes of cells range from 1-100 pm (10-6 m) while molecules are much smaller, in the range of picometers (10– ‘2m) for those like water and in nanometers (10-9m) for some like haemoglobin.   Common Error 3 Living things contain cells Corr ...

Tuition Center Singapore Physics Tuition – Kinematics Definitions Displacement is the measurement of distance from a reference point to another point in a certain direction. The SI unit of displacement and distance is metre (m). Velocity is the rate of change of displacement. Speed is the rate of change of distance. Velocity is a vector quantity whereas speed is a scalar quantity. Speed is the magnitude of velocity. The SI unit of velocity and speed is metre per second (m/s or m s-1). For constant speed, its value is given by: Speed  =  distance travelled / time taken           For non-constant speed, the average speed is given by:           Average speed = total distance travelled / total time taken.   Please contact Mr Ong @ 9863 9633 or Angie @ 96790479 if you need help in O ...