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Two resistor RA = 1.95ohms, and RB = 0.05 ohm are connected in parallel and take a total current of 50 amp. What is the current through each resistor.
Three resistors A, B, and C are connected in parallel to a 120 volt source. If RA is = 60 ohms and RB is = 40 ohms, IC is 5 amp, calculate the equivalent resistance and the total current of the circuit.
1. a particle moves with a simple harmonic motion in a straight line. at t=0, the acceleration is 3 m/s²,the velocity is 1m/s and the displacement is "-0.30m." find the amplitude and the period of motion
2. brine from a first tank runs into a second tank at 2 gal/min, and the brine from the second tank runs into the first at 1 gal/min. initially, there are 10 gallons of brine containing 20 lb of salt in the first and 10 gallons of fresh water in the second tank. how much salt will there be in the first tank after 5 min?
The economy is at full employment.Now the Government wants to change the composition of demand toward investment and away from consumption without,however, allowing aggregate demand to go beyond full employment.What is the required policy mix? Use an IS-LM diagram to show your policy proposal .
8. Use the steam tables to calculate the enthalpy change (in kJ) of 2 kg-mol of water/steam when heated from:
a) 293 K & 100 kPa to 303 K & 100 kPa.
b) 400 K & 100 kPa to 900 K & 100 kPa..
A motor vehicle of mass 2000 kg travels round a curved path of radius 55 m the coefficient of friction between the tyres and the road surface is 0.75. The track of the vehicle is 1.5m and the centre of gravity is 70cm above ground level. Calculate the maximum speed at which the vehicle can travel round the curve:
i. without skidding outwards ii. without overturning
iii. if the angle of tilt is 300 without overtuming.
Discuss the bending moment theory with regard:
(A) A review to geometric properties
(B) Stress due to pure bending
(C) Shear formula derivation
(D) Stress due to shear
A motor vehicle of mass 2000 kg travels round a curved path of radius 55 m. the
coefficient of friction between the tyres and the road surface is 0.75. The track of the
vehicle is 1.5 m and the centre of gravity is 70 cm above ground level. Calculate the
maximum speed at which the vehicle can travel round the curve:
i. without skidding outwards
ii. without overturning
iii. if the angle of tilt is 300 without overturning
The diameter of a brake drum is 30 cm. the pivot for the brake shoe and the point of
application of the force actuating the shoe are 120 mm each from the axis of rotation.
Assume that the pressure distribution over the brake lining is equal to a single force
acting radially and the coefficient of friction is 0.25. Calculate the braking torque
exerted by an operating force of 900 N on:
i. The leading shoe
ii. The trailing shoe
A vehicle travelling at 70 km/hr is accelerating up a hill with a gradient of 1 to 20. If
the mass of the car is 1500 kg, the frontal area is 1.95 m2
, rolling resistance of 240 N
and the drag coefficient of the body if 0.035. At this instant, the engine is developing
56.80 KW at 4000 rev/min and the transmission efficiency is 80%. If the rear axle
ratio is 5.2 to 1 and the rolling radius is 35 cm. Calculate the acceleration of the
vehicle. (Take TR = RG + RR + RA)
