Mechanical Engineering Answers

Two liquid streams are pouring in a container, 8 in. diameter and 15in. high. The mass flow rate of stream A is 1.2 lb/sec and the volume flow rate of B is 0.035 ft3/s. If the specific gravities of A and B are 1.1 and 0.9, respectively, What is the gage and absolute pressure at the bottom of the filled tank in psia.

Draw the profile of a cam in which the follower moves with simple harmonic motion during ascent while it moves with uniform velocity motion during descent. The other data is as follows.

Least radius of cam = 50mm; Angle of ascent = 480; Angle of dwell between ascent and descent = 420; Angle of descent = 600; Lift of follower = 40mm; Diameter of roller = 30mm; If the cam rotates at 360 r.p.m. anticlockwise, find the maximum velocity and acceleration of the follower during descent.

A Fahrenheit and a centigrade thermometer are both immersed in a fluid. The Fahrenheit numerical reading is twice that of the centigrade reading. What is the temperature of the fluid in Rankine and Kelvin scale?

An inhabitant of another planet weighs 50 lb on a spring type of scale in the planet atmosphere, where the local gravity

acceleration is g = 6.0 fps2. This inhabitant appears in St. Michael, Alaska, where the local gravity acceleration is g=32.22 fps2. For this outer-space being, determine (a) his mass in lb in slugs on his native planet, (b) his mass in lb and slugs on earth (c) his weight as indicated by a spring type scale on earth.

A hiker is carrying a barometer that measures 29.92inHg absolute at the base of the mountain. The barometer reads

25.5inHg absolute at the top of the mountain. The average air density is 0.076 lbm/ft3, the gravitational acceleration remains constant at 32.174 ft /s2. What is the mountain’s height?

At 24° latitude, the gravitational acceleration as a function of elevation z above sea level is given by g=a-bz,

where a=9.807 m/s2 and b=3.32x10-6 s-2. Determine the height above sea where the weight of an object will decrease by 1 percent.

The acceleration of high-speed aircraft is sometimes expressed in g’s (in multiples of the standard acceleration of gravity). Determine the net upward force, in N that a 90 kg man would experience in an aircraft whose acceleration is 6 g’s.

The force of attraction between two masses m1 and m2, having dimensions that are small compared with their

separation distance R, is given by Newton’s third law, F=Gm1m2/R2, where G=6.67259x10-11 N-m2/kg2. What

is the total gravitational force that the sun (1.97x1030 kg) and the earth (5.95x1024 kg) exert on the moon (7.37x1022 kg) at

an instant when the earth, moon, and sun form a 90° angle? The earth-moon and sun-moon distances are 380x103 km

and) 150x106 km, respectively

The acceleration of gravity is given as a function of elevation above sea level by the relation g=9.81-3.32x10-6 h, with h measured in meters. What is the weight

of an airplane at 10km elevation when its weight at sea level is 40 kN?

Convert a chromel-alumel thermocouple measurement of 3.100 millivolts (mV) to degress Celsius. For a chromel-alumel type K thermocouple, 3.100 mV is between the entries of 2.667 (at 150°F) and 3.819 (at 200°F). Assume a linear relation between the two.