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Two cars, A and B, start at the same point. A travels north at 10 mph and B at 8 mph due
southwest. Find in what direction and rate by which car B is moving, with regards to car A.
A fluid temperature rise of 18°C in the fluid cooled condenser is equivalent in °F to:
Calculate de broglie wavelength and velocity of an electron carrying kinetic energy 3keV
4. An automobile tire initially contains 0.25 lbm of air at 30 psig, 70 OF and have an automatic valve
that releases air whenever the pressure exceeds 32 psig. After driving, the temperature of air inside
rises to 120 OF, (a) what mass of air escapes to the atmosphere? lbm, (b) What is the tire gage
pressure when the remaining air inside has returned to 70 OF? psig
3. A steady state, steady flow compressor draws in 236 liters per second of air whose density is
1.268 kgm/m3 and discharges it with a density of 4.88 kgm/m3. At suction P1= 103.39 kPaa; at
discharge, P2 = 551.428 kPaa. The increase of specific internal energy is 78.45 kJ/kgm and the heat
from the air by cooling is 30.17 kJ/kgm. Neglecting the change in potential and kinetic energies,
determine the work in kJ/min.
2. A tank, initially empty, is in the form of a right circular cylinder with hemispherical ends. The overall
length of the cylinder tank is 3 meters and the diameter of the hemisphere is 1 meter. If a pump
discharges a fluid, whose density is 1.2 kgm/Liter, in this tank at a rate of 300 liters per minute
determine a.) Weight of liquid inside the tank after 5 minutes, KN, and b) total time to fill the tank,
min.
1. Saponification is a process wherein soap is added to a certain type of oil to produce grease. One
such grease is said to have 75.7 % by volume oil and 24.3% by volume soap, wherein the oil and
soap have densities 760 kgm/m3 and 6,250 kgm/m3, respectively. This kind of grease is sold by
packs shaped like a sphere with a diameter of 20 cm for convenience. Calculate: a) the mass of
oil per pack (kgm), b) the mass of soap per pack (kgm),c) the weight of each pack (kgf), d) the
specific weight of grease (N/m3), e) will the grease float if it is placed in water whose density is 1000 kgm/m3? Explain
A magnetic field exerts a force of 8.0 x 10^–14 N toward the west on a proton moving vertically upward at a speed of 5.0 x 10^6 m/s. When moving straight in a northerly direction, the force on the proton is zero. Determine the magnitude and direction of the magnetic field B in this region. (The charge of a proton = 1.6 x 10-19 C, the north direction is into the page.).
An electron moves with an energy of 6.0×10^-16J across a magnetic field of 4.0×10^-3T perpendicularly. Calculate the velocity of electron, force on the electron,orbital radius of the electron and the period of motion.
A jet-fighter flying borizontally in the direction towards south and at an altitude of 5000 feet with speed 400 mi/h drops a bomb which falls down under the force of gravity. Immediately after releasing the weapon the pilot heads his plane to the northeast direction at a supersonic speed of 700 mi/h (a) what is the time the bomb is in the air" (b) How much horizontal distance does the homb covers during the fall? (c) When the bomb hits the ground, what is the distance between the bomb and the jet.
