You can only unlock the chapter using a special code that we will send you via the Viber app. Receiving a message is free of charge and with no obligations.
My phone number:
Get a code
In compliance with the law, persons under the age of 15 can enter their phone number only in the presence of a parent or guardian.
4-character code:
Check the received code
The page will be refreshed automatically in a few seconds.
To ensure the proper functioning of the website, OpenProf uses cookies that do not store personal data. By continuing to use the website, you agree to cookies. Tell me more »
, where 
is the potential difference across a resistor and 
is the current through the same resistor?
)
)
)
)
, 
, 
and 
are all units of length.
?
(one picosecond) and a distance of 
(one gigametre)?
is dropped into a tank of water. As it sinks at speed 
, it experiences a drag force 
given by 
, where 
is a constant. What are the SI base units of 
of waves on a stretched wire is given by the equation
is the tension in the wire and 
is the mass per unit length of the wire. What are the values of 
and 
?
.
.
.
.
, the specific heat capacity 
of a particular solid is given by:
is the thermodynamic temperature and 
is a constant characteristic of the solid. The SI unit of specific heat capacity is 
. What is the unit of constant 
moves a distance 
in time 
. The equation relating these quantities is
is the internal radius of the tube and 
and 
are constants. Which line gives the correct units for 
between two point charges 
and 
, a distance 
apart, is given by the equation:
is a constant.
.
of the oscillations is given by
is the mass of X,
is the length between the clamp and X,
is the Young modulus of the material of the beam, and
is a constant.
.
. Charge 
passes one point in the wire in time 
. State
, that move with speed 
along the wire. There are 
of these electrons per unit volume.
, the current 
is a constant.
is moving at speed 
through air of density 
. The resistive force 
acting on the sphere is given by the expression:
and 
are constants without units.
is placed on the end of a spring that is hanging vertically, as shown in the figure below.
. The period 
is a constant and 
is the spring constant. Show that 
of a sound wave moving through a gas is given by
is the frequency of the wave,
is the amplitude of the wave,
is the speed of the wave and
is a constant that depends on the gas.
and a circular cross‑section of radius 
. A liquid of density 
flows through the pipe. The mass 
of liquid flowing through the pipe in time 
is given by:
and 
are the pressures at the ends of the pipe and 
is a constant.
of 
is hung from end Q and the beam bends slightly, as illustrated in the figure below.
of the beam from the edge of the clamp R to end Q is 
. The width 
of the beam is 
and the thickness 
of the beam is 
. The material of the beam has Young modulus 
.
of the oscillations is 
.
.
of gas that flows through the nozzle in a short time 
is given by:
is a constant with no units,
is a quantity that depends on the nozzle size,
is the density of the gas arriving at the nozzle,
is the pressure of the gas arriving at the nozzle.
. It is then suspended and hangs vertically as shown in the figure below.
.
.
is the density of the metal,
is the acceleration of free fall,
is the cross-sectional area of the wire and
is a constant.
for a satellite to orbit the Earth is given by:
is the distance of the satellite from the centre of the Earth,
is the mass of the Earth, and
is a constant.
of liquid that flows through a pipe in time 
is given by the equation:
is the pressure difference between the ends of the pipe of radius 
and length 
. The constant 
depends on the frictional effects of the liquid. Determine the base units of 
.
of a sound wave is related to the amplitude 
of the wave by:
is the density of the medium through which the sound is passing,
is the speed of the sound wave,
is the frequency of the sound wave, and
is a constant.
, of a sound wave where:
.
experiences a resistive force 
due to the air as it moves through the air at speed 
. The resistive force 
is a constant. Derive the SI base unit of the constant 
every second. Calculate how many meters a light-year measures. Note that a year equals 365.25 days.
?
represents the MPa, while 
represents the unit Pa) .
