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Physics
Rotational movement is motion around an object's center of mass where every point in the body moves in a circle around the axis of rotation. The center of mass is the point in an object from which there is an equal amount of mass in any two opposite directions. The axis of rotation is a line that passes through the center of mass. Compare between centrifugal force and centripetal force. Provide diagram / figures to support your answer.
(10 marks)
(10 marks)
Physics
In a guitar string, the simplest way it vibrates is at its fundamental frequency. The amplitude of the oscillation varies along the string.
a)Analyze in details the factors that affected the frequency.
b)Compare between resonance, overtones and harmonics.
a)Analyze in details the factors that affected the frequency.
b)Compare between resonance, overtones and harmonics.
Physics
Pressure is an expression of force exerted on a surface per unit area. The standard unit of pressure is the Pascal (Pa), inches of mercury (inHg) or bar.
(a) Compare between gauge pressure, absolute pressure and ambient pressure
(b) A rigid container of a volume 50m3 having an initial pressure of 100kPa and temperature of 250K. After gas is added into the container the final temperature is 400K. Find the final pressure inside the container?
(a) Compare between gauge pressure, absolute pressure and ambient pressure
(b) A rigid container of a volume 50m3 having an initial pressure of 100kPa and temperature of 250K. After gas is added into the container the final temperature is 400K. Find the final pressure inside the container?
Physics
Temperature is one of the measurements being used in order to identify a degree of hotness or coldness of a certain matter, weather or body of a human being.
Compare between the units of temperature, Celsius, Kelvin and Fahrenheit and
explain the differences between sensible heat and latent heat
Compare between the units of temperature, Celsius, Kelvin and Fahrenheit and
explain the differences between sensible heat and latent heat
Physics
A progressive wave equation is represented by Y=a if the face difference of a progressive wave is 45 degree. Determine the value of x in the equation
Y=A sin (150πt - πx/wavelength)
Y=A sin (150πt - πx/wavelength)
Masses on table
Two masses, A and B, lie on a frictionless table, as shown.
They are attached to either end of a light rope of length l which
passes around a pulley of negligible mass. The pulley is attached
to a rope connected to a hanging mass, C. Find the acceleration of
each mass. (You can check whether or not your answer is reason-
able by considering special cases—for instance, the cases MA = 0,
or MA = MB = Mc.)
Two masses, A and B, lie on a frictionless table, as shown.
They are attached to either end of a light rope of length l which
passes around a pulley of negligible mass. The pulley is attached
to a rope connected to a hanging mass, C. Find the acceleration of
each mass. (You can check whether or not your answer is reason-
able by considering special cases—for instance, the cases MA = 0,
or MA = MB = Mc.)
Mass on wedge*
A 45◦ wedge is pushed along a table with constant acceleration A.
A block of mass m slides without friction on the wedge. Find the
block’s acceleration. Gravity is directed down
A 45◦ wedge is pushed along a table with constant acceleration A.
A block of mass m slides without friction on the wedge. Find the
block’s acceleration. Gravity is directed down
Physics
2 current and voltage 2volt and area 0.2cm square calculate resistance
In an automobile engine, the gas (a mixture of air and petrol) in the cylinders is compressed to 1\9 of its original volume. The initial pressure is 1.0 atm and the initial temperature is 27 °C.
If the pressure after compression is 21 atm, the temperature of the compressed gas is (Assume that the gas behaves as ideal.)
Physics
a system consists of two identical particles.each paticle can occupy only two energy levels. E1 = e .if the paticles satisfy boltzmann statistics , the partition function would be
