Physic’s Hypothesis
Concept
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Hypothesis
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The
longer the length, the longer the time of oscillation
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Inertia
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The
greater the mass, the greater the inertia
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F=ma
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The
greater the force, the greater the acceleration. (constant mass)
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The
bigger the mass, the smaller the acceleration. (constant force)
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Impulsive
force
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The
shorter the time of collision, the bigger/greater the impulsive force
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Momentum
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The
bigger the mass (moving object), the greater the momentum (constant speed)
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The
higher the velocity (moving object), the greater the momentum (constant mass)
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Hooke
F=kx
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The
greater the applied force, the greater the extension/compression
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The
bigger the force constant, the smaller the extension/compression.
(
k increases if shorter spring/ smaller diameter of spring/ springs arranged
in parallel/ thicker spring )
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Energy
K.E.
= mgh
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The
greater the vertical height, the greater the speed achieved.
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Pressure
P=F/A
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The
greater the force, the greater the pressure (constant area)
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The
smaller the surface area in contact, the greater the pressure (constant
force).
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P=hpg
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The
deeper the depth, the greater the liquid pressure.
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The
higher the density, the greater the liquid pressure.
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U=vpg
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The
greater the volume of fluid/liquid displaced, the greater the buoyant force.
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Bernoulli
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The
greater the speed of fluid/liquid, the lower the pressure of the
fluid/liquid.
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Pascal
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The
greater the output area, the greater the output force.
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Gas
law
= k
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The
bigger the volume, the smaller the pressure. (constant temperature)
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The
higher the temperature, the greater the pressure. ( constant volume)
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The
higher the temperature, the bigger the volume. (constant pressure)
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Plane
mirror
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The
greater the object distance, the greater the image distance.
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Convex
lens
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The
shorter/smaller the object distance, the greater the image distance.
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The
shorter/smaller the object distance, the greater the size of image.
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The
thicker the convex lens, the greater the distance of the image focused on the
screen.
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n=
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The
smaller the angle of incidence, the smaller the angle of refraction.
(constant refractive index)
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n=
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The
greater/deeper the real depth, the greater/deeper apparent depth.
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n=
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The
greater the refractive index, the smaller the critical angle.
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Wave
v=f
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The
bigger the frequency of the wave, the shorter its wavelength.
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REFLECTION:
The smaller the angle of incidence, the smaller the angle of reflection.
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REFRACTION
(water) : The shallower the region, the shorter the wavelength.
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DIFFRACTION
: The longer the wavelength, the greater the diffraction.
: The smaller the
opening/gap/barrier, the greater the diffraction.
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ʎ=
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Interference
: The smaller the separation of slits, the greater the separation of the
fringes.
: The longer the
wavelength, the greater the separation of fringes.
: The smaller the
separation between two loudspeakers, the greater the separation between two
consecutive loud sounds
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Electric
field
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The
greater the separation between the metal plates, the smaller the strength of
the magnetic field.
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Ohm
law
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The
greater the potential difference across a conductor, the bigger the current
flowing.
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Factors
affecting resistance
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The
longer the wire, the higher the resistance.
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The
bigger the cross sectional area, the smaller the resistance.
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The
higher the resistivity, the higher the resistance.
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R=p
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The
higher the temperature, the higher the resistance.
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Heating
effecting
E=I2R
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The
bigger the current flowing, the greater the heating effecting.
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Power
output
P=IV
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The
larger the current flow, the greater the power output. ( rate of motor
lifting a load)
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E.M.F.
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The
larger the current flow through the circuit, the lower the potential
difference across the dry cell.
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Electromagnet
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The
bigger the magnitude of current, the greater the magnetic force (motor turn
faster).
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The
bigger the magnitude of current flowing, the greater the strength of
electromagnet.
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Magnetic
induction
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The
greater the number of turns in the solenoid, the greater is the induced
current flowing in the solenoid.
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The
higher the rate of change of magnetic flux, the larger the induced e.m.f.
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The
greater the strength of the magnet, the larger the induced e.m.f.
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Transformer
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The
greater the number of turns in the secondary coil, the bigger the output
voltage of the transformer.
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CRO
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The
stronger the magnetic field, the greater the deflection by the cathode ray.
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Diode
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When
the diode is forward-biased, the greater the potential difference across the
bulb, the bigger the current flowing through the diode.
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Transistor
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The
bigger the base current, the bigger the collector current.
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Half-life
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The
longer the time of decay, the lower the activity of a radioactive material.
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Penetration
power of radiation
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The
further the source, the smaller the intensity of the activity detected.
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The
thicker the thickness, the smaller the intensity of the radioactivity
detected.
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Sis can u giv this "hypothesis for Physics Form 4 and Form 5"
ReplyDeletein document format.please