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A 6.0 V battery is connected to two 7.90 kilo-Ohm resistors in series. An ammeter of internal resistance 0.530 Ohm gauges the current and at the same time a voltmeter with internal resistance 16.5 kilo-Ohm gauges the voltage across one of the 7.90 kilo-Ohm resistors in the circuit. What does the ammeter read?
A 120-V motor has mechanical power output of 3.00 hp. It is 88.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
A sprinter explodes out of the starting block with an acceleration of +3.5 m/s2, which she sustains for 1.0 s. What is her velocity at the end of the race
High-speed stroboscopic photographs show that the head of a 250-g golf club is traveling at 52 m/s just before it strikes a 46-g golf ball at rest on a tee. Find the speed of the golf ball just after impact
A transformer with a turns ratio (secondary:primary) of 1:81 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit. What is the voltage supplied to the recharger? V
A 30 kg launching machine fires a 250 gram projectile horizontally at 100 m/s. This causes the machine to slide backward 1.122 meters before coming to a rest. What surfaces are likely to cause this friction
A contact lens is made of plastic with an index of refraction of1.52. The lens has an outer radius of curvature of+1.94cm and an inner radius of curvature of+2.54cm. What is the focal length of the lens?
A positively charged He+ atom has two protons in the nucleus and one electron in the shell. In a classic model of the atom, What is the radius of the orbit
The launching mechanism of a toy gun consists of a spring ofunknown spring constant. determine the speed of the projectile as it moves through the equilibrium position ofthe spring
suppose the memebers of an orchestra are tuning up their instruments, whats's the speed of the wave along the violin string
A 2 micro-farad and a 5 micro-farad capacitors were connected inseries to a 12 volt battery. After the capacitors were fully charged, the battery was disconnected. The capacitors were connected in parallel. Find the charge on each capacitor in the..
The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0 above the horizontal, some of the tiny critters have reached a maximum height of 52.7 above the level ground. What was the takeoff speed..
An image of a 5 centimeter tall object is formed on a screen 20 centimeter away from a thin lens. Obtain how far away from the lens is the object
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