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A 10-lb uniform rod CD of length l =2.2 ft is welded at C to two elastic rods, which have fixed ends at A and B and are known to have a combined torsional spring constant K = 18 lb · ft/rad. Determine the period of small oscillations, if the equilibrium position of CD is
(a) vertical as shown,
(b) horizontal.
A 45 dB sound wave strikes an eardrum whose area is 4.1 × 10-5 m2. How much energy is received by the eardrum per second
The space shuttle takes off from Cape Canaveral in Florida and orbits Earth 15 times before landing back at Cape Canaveral 24hours and 15 minutes later. What is the average speed of the space shuttle
1. A 10-kg body is observed to have an acceleration of 5 m/s². What is the net force acting on it? A force of 80N gives an object of unknown mass an acceleration of 20 m/s². What is its mass?
A 64 kilogram person is ice-skating due north with a velocity of 6.3 m/s when he collides with a 43 kilogram boy. determine the magnitude of the boy velocity
question a projectile is launched from a platform 35 feet high with an initial velocity of 20 feet per second. the
A generator supplies 120 V to a transformer's primary coil, which has 44 turns. If the secondary coil has 490 turns what is the secondary voltage
A 1-microF capacitor, a 10-Ohm resistor and a 1 microH inductor are connected in series with a sinusoidal signal generator of 10V peak voltage amplitude operating at a frequency ? of 100 rad/s. Find the amplitude of current oscillations in the circ..
a singly ionized helium atom he has only one electron in orbit about the nuclues. what is the radius of the ion when it
Find out the magnitude of angular acceleration of the wheel
An object at 20 degrees celsius with heat capacity of 100 cal/degrees celsisu is placed in 40g of water at 100 degreescelsius. After equilibrium is reached, the object is removedfrom the hot water and placed in 200g of water at 0 degreescelsius.
It is common to see birds of prey rising upward on thermals. The paths they take may be spiral-like. You can model the spiral motion as uniform circular motion combined with a constant upward velocity. Assume a bird completes a circle of radius 6...
A 70.0 kg stuntman is attached to a bungee cord. He is standing on a ledge that is 50 m high. How much gravitational potential energy does he have
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