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PARALLEL CIRCUIT
- what is the equivalent resistance of this circuit?
(150 ohms upper side of the circuit, 250 ohms in the left side and 50 ohms below side of the circuit)
1. Two 80 Ohms are connected in series with 0.15A flowing through them?
FIND;
A. total resistance
B. voltage drop across resistors
C. current through the circuit
2. in this circuit, the voltage drop across the upper resistor is 4.5V.
What is the battery voltage?
What is the current through the circuit?
What is the resistance in the circuit?
(30 ohms in the upper side of the circuit and 50 ohms in the right side of the circuit)
2. draw the labeled diagram of an electric circuit comprising of a cell, a resistor, an ammeter. a voltmeter, and a switch (or plug key)
A 7500kg rocket blasts off vertically from the launch pad with a constant upward acceleration of 2.25m/s^2 and feels no appreciable air resistance. When it has reached 525m, its engine fails; the only force acting on it now is gravity. (a) What is the maximum height this rocket will reach above the launchpad? (b) How much time will elapse after engine failure before the rocket come crashing down to the launch pad, and how fast will it be moving just before it crashes? (c) sketch ay-t, Uy-t and y-t graphs of the rocket's motion from the instant of blast-off to the instant just before it strikes the launch pad.
An iron rod 4m long & 0.5cm^2 in cross sectional area streches 1mm when a mass of 225kg is hong on it end. Extimate the stress and the strain experience by the iron rod?
A body initially at rest is acted upon by a constant force of 18lb for 5 sec, after which an opposite force of 12lb id applied. In what additional time will the body come to rest
At time t = 0, the displacement x(0) of the block in a linear oscillator like that of Fig. 3
is -8.50 cm. The block’s velocity v(0) then is -0.93 m/s, and its acceleration a(0) is 45.0
m/s2 . Determine,
(i) the angular frequency of this system,
(ii) phase constant and
(iii) amplitude of this system. [3,5,3]
A Carnot heat engine receives heat from a reservoir at 900°C at a rate of 800 kJ/min and rejects the waste heat to the ambient air at 27°C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at 25°C and transfers it to the same ambient air at 27°C. Determine (a) the maximum rate of heat removal from the refrigerated space and (b) the total rate of heat rejection to the ambient air.
A proton collides elastically with another proton that is initially at rest. The incoming proton
has an initial speed of 3.5 x 105m/s and makes a glancing collision with the second. (At
close separations, the protons exert a repulsive electrostatic force on each other.) After the
collisions, one proton moves off at an angle of 37o to the original direction of motion and
the second deflects at an angle of φ to the same axis. Find the final speeds of the two
protons and the angle φ. [12]
