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A small object with a momentum magnitude 6.0 kg m/s approaches head on a target at rest. The small object bounces straight back with a momentum of magnitude 6.0 kg m/s. What is the magnitude of the small objects momentum change in kg m/s?
A vertical straight wire carrying an upward 30-A current excerts an attractive force per unit length of 8.0*10^-4 N/m on a a second paralled wire 7.0 cm away
During a research experiment on the conduction of current in the human body, a medical technician attaches one electrode to the wrist, what is the overall resistance of the patient's arm
An un-tethered block sits on a flatbed truck as it accelerates up an incline that makes an angle of 15° with respect to the horizontal. What is the coefficient of static friction between the truck and the block
A viscous liquid is flowing steadily through a pipe of diameter D. Suppose you replace it by 7 parallel pipes, what is the total rate of flow in the 7 pipes compared to the original flow rate
A circuit contains six 205 ohm lamps with 60 W bulbs and a 9 ohm heater connected in parallel. voltage across the circuit is 120 V.what is the current in the circuit when four lamps are turned on.
A silicon solar cell looks like a battery with a 0.33Vterminal voltage. What is the solar cell's efficiency-that is, what percentage of the energy incident on the cell is converted to electric energy
A river has a steady speed of 0.25m/s. A student swims upstream a distance of 1 km and swims back to the starting point. If the student can swim at the speed of 1.4m/s in still water.
The period of a physical pendulum is measured first at sea level, where the pendulum completes 100 cycles in 1561 s, and then on a mountaintop, find the height of the mountain
A sled is pulled with a horizontal force of 20 N along a level trail, and the acceleration is found to be 0.35 m/s2. An extra mass m = 4.2 kg is placed on the sled. If the same force is just barely able to keep the sled moving, what is the coeffic..
Two thin convex lenses, A and B, lens A has a long focal length and lens B has a short focal length. which lens will produce an image at a smaller s'
The work function for platinum is 6.35 eV. Find the cutoff wavelength for platinum
A block of mass A=.75kg moves with a constant speed v0=5.2 m/s and approaches another block which is at rest and attached to an ideal spring with the force constant k=2.5 N/m. Determine the amplitude of oscillations of the 2 blocks
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