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A small bag of sand is suspended by a wire of length L=1.2 m. A bullet of mass m=8 gr, moving with speed v0=600 m/s in the horizontal direction, hits the bag and leaves with a speed v=250 m/s. The bag swings to a maximum angle of ?=100.
(a) What is the mass of the bag?
An RL series circuit has R = 80.0? and L = 1.95mH . The series combination is connected across a 165V (rms), 63Hz power supply. Find the peak current
Two ships are moving along a line due east. The trailing vessel has a speed of 16 km/h relative to a land-based observation point, What frequency is monitored by the leading ship
Two ropes are attached to a heavy box to pull it along the floor. One rope applies a force of 438 newtons (N) in a direction due west; the other applies a force of 402N in a direction due south.
Air conditioners are rated by their coefficient of performance at 60F inside temperature and 96F outside temperature. What is the maximum possible coefficient of performance
A heat engine operates between two reservoirs whose temperatures are 139.3°C, What is the maximum efficiency of this engine
A fan blade is revolving at 20 cycles/s when someone turns off the fan. How long will it take for the fan blade to come to rest
when it falls back it hits the ground with speed v1=50m/s. The mass of the ball is m=20g. Illustrate what is the total work done by the drag force while the ball is in the air?
Five clarinets sit a distance of 11.5 m from the audience. Together the intensity level of the music is 78.5 dB, What is the intensity of one clarinet
A 1600kg sedan goes through a wide intersection traveling from north to south when it is hit by a 2500kg SUV traveling from east to west. How fast was sedan traveling just before the collision
A cable is lifting a construction worker and a crate, as the drawing shows. What is the tension in the cable above the worker
A bag of cement of weight 375 N hangs from three wires as suggested in Figure P5.18. Two of the wires make angles θ1 = 55.0° and θ2 = 25.0° with the horizontal. If the system is in equilibrium, find out the tensions in the wires.
You are driving a car which is heading 20 m/s towards a brick wall. You sound a horn which emits at a frequency of 400 Hz when at rest. What is the beat frequency that you hear
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