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The gravitational force between two identical spheres is given as 6 x 10-5 N. The spheres are separated by a distance of 0.60 m at the center. What is the mass of each sphere?
A 60W-100V tungsten lamp has a resistance of 20 ohms at air temperature (0◦C). What is the rise in temperature of the filament under normal working conditions? The temperature coefficient of resistance of tungsten is 0.0052/◦C.
An ideal gas is enclosed inside a chamber with a volume of 0.1 ft3 at 115 deg. Celsius
and 690 kPa. It then expands isentropically to a final pressure of 138 kPa. Calculate
the mass, final temperature, final volume, change in enthalpy and non-flow work done
during the process for this gas. Assume Cv = 0.7201 kJ/kg.K and Cp = 1.0048 kJ/kg.K
The work required to compress reversibly according to pV1.3= c is 45000 ft.lb if there
is no flow. Determine the change in internal energy and heat transferred if the gas is
air.
A local football player is practicing football on top of a 35 m high hill. he kicks the soccer ball, which lands 50 m from the base of the hill. determine the initial horizontal velocity of the soccer ball.
An electron is placed midway between two parallel horizontal conducting plates 2.0 cm apart in air. What must be
the potential difference between the plates for the electrons to remain stationary? What
must be the sign of the charges in each plate?
Determine the potential at a point 0.50 m (a) form a +20 μC point charge, (b) form a -20 μC point charge.
Which of the following is the best definition for a hysteresis loop in materials science?
A) A non-linear force-extension curve for a material.
B) A non-linear stress-strain curve for a material.
C) A situation where the material response differs between loading and unloading.
D) Any situation showing a time-dependent response.
- A bullet is fired at an angle of 30degrees to the horizontal with a velocity of 150m/s calculate the time the bullet takes to attain it's maximum height
A horizontal force of 0•80N is Required to pull A 5kg Block Across a table top at a constant speed. With the block initially at rest again. Determine the speed v of the bullet where the bullet is assumed to be embedded in the block.
