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An electronic flash attachment for a camera produces a flash by using the energy stored in a 770 µF capacitor. Between flashes, the capacitor recharges through a resistor whose resistance is chosen so the capacitor recharges with a time constant of 3.0 s. Determine the value of the resistance.
If a person hike 5 km north, 4 km to the east, 3 km to the north, 2km to the west, and 4 km to the south. What is the the distance the hiker traveled
A stone tosses at an angle of 60 degrees to the horizontal from the roof of a building at 10 m/s hits the ground in 3s. how far from the building did it land
A research submarine has a 10-cm-diameter window that is 8.9cm thick, What is the submarine's maximum safe depth in salt water
a projectile of mass 0.831 kg is shot straight up with an initial speed of 28.9 ms. if the projectile rises to a
A boy is on a Ferris wheel, which takes him in a vertical circle of radius 7.6 m once every 15.0 s. What is the angular speed of the Ferris wheel
A copper wire has diameter 0.140mm and length 11.0cm . It's in a horizontal plane and carries a current of 2.50A, Find the magnitude of the magnetic field needed to suspend the wire against gravity.
A pulse from a ruby laser (lambda = 694.3 nm) has an average power of 20 MW and lasts 2.3 ns. What is the total energy of the pulse
Lightbulbs with the power ratings giving in the figure are connected in a circuit as shown. Find the power dissipated to each bulb
Demonstrating the low melting point of Gallium metal (29.8°C), an instructor removes a 1.00 kg sample of the metal from a container at room temperature (20.0°C) and places it onto the palm of his hand.
The mass of the earth can be given as 10 moles of kilograms. What does this statement mean, and what is the error with the actual mass of the earth (5.98 x 1024 kg)
Two spheres are cut from a certain uniform rock. One has radius 4.30cm. The mass of the other is six times greater. Find its radius.
A cluster of galaxies has a radius of about 5.2 million light-years (4.9×10^22) and an intracluster medium with a temperature of (6.5×10^7) K. Estimate the mass of the cluster. Give the answer in both kilograms and solar masses. Suppose combined l..
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