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A heart defibrillator delivering 400 J of energy by discharging a capacitor initially at 10,000 V has a capacitance of 8.00 µF (see Example 18.11 of the textbook). The energy stored in the capacitor of a second defibrillator is only 304 J but the charge in both defibrillators is the same. What is the voltage of the second defibrillator?
What was the velocity of the bullet just before it struck the wooden block? The length of the string is 2 meters.
A converging lens and a diverging lens, separated by a distance of 20.5 cm, are used in combination. What is the focal length of the diverging lens
Assume you are a scuba diver preparing for a 30m dive into sea water of density 1025 kg/m3, what are the gauge and absolute pressures in Pa you experience at a depth of 30 m in the sea
Your 300 ml cup of coffee is too hot to drink when served at 92C.What is the mass of an ice cube, taken from a -19C freezer, that will cool your coffee to a pleasant 61C.
Assume that there is a very beautiful ornate crown, supposedly made of solid gold, how would you determine its density
Sarah throws a ball too hard so it is over Julie's head when it reaches Julie's horizontal position, What is the speed of the ball when it leaves Sarah's hand
A simple pendulum is made of a small blob of mass m = 9.500 kg attached to the end of an inextensible wire. What is the magnitude of the tension in the wire
A massless spring is compressed between blocks of mass x and 5x on a smooth horizontal frictionless surface. What fraction of the total energy does the small block recieve
A car battery stores about 3.00 MJ of energy. If all this energy were used to generate a uniform electric field of 27.0 kV/m, what volume would it occupy.
Suppose that a particle accelerator is used to move two beams of particles in opposite directions. In a particular region, electrons move to the right at 9350 m/s and protons move to the left at 1681 m/s. The particles are evenly spaced with 0.085..
When playing fortissimo (very loudly), a trumpet emits sound energy at a rate of 0.750 W out of a bell (opening) of diameter 13.2 cm. What is the sound intensity level right in front of the trumpet
Planet Z is 7000km in diameter. The free-fall acceleration on Planet Z is 10.0m/s2, What is the free-fall acceleration
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