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The flash unit in a camera uses a 9 V battery to charge a capacitor.The capacitor is then discharged through a flash lamp. The discharge takes 10 micro seconds , and the average power dissipated in the flash lamp is 10 W . What is the capacitance of the capacitor? (answer in ?F)
An electron and a positron, each moving at 3.0*10^5 m/s, collide head on, disappear, Determine the momentum of each photon
A snow mibile is pulling a large sled across a snow-covered field. The weight of the sled is 3560 N. If the coefficient of friction of the sled is 0.12,
A car is traveling 80 km/hr in a school zone. A police car starts from rest just as the speeder passes it and accelerates at a constant rate of 8 km/hr·s. Eluciadte when does the police car catch the speeding car?
You have 2 capacitors plus 1 resistor all hooked up in series. The value of R= 15 ohms and C1=C2= 1uf. Find the time constant T(tau)=RC
A distance away from a uniformly charged spherical object, the magnitude of the electric field is 575V/m and the electric potential is 3.50kV. What is the distance to the center of the object
A tiny sphere with a charge of q = +6.0 µC is attached to a spring. Two other tiny charged spheres, each with a charge of ?4.0-µC, are placed in the positions, in which b = 3.8 cm. The spring stretches 5.0 cm from its previous equilibrium position..
A helicopter flies at a constant altitude towing a mass M of 119 kg. The helicopter and the mass have a horizontal acceleration of 2.54 m/s^2. Ignore air resistance find the tension in the cable.
consider a metal rod, length = .30m, cross sectional area=0.0010m^2, temperature difference between the ends is 65*C. What is the thermal conductivity of the metal
A 45.0kg girl is standing on a 170 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.53m/s relative to the plank.
Find the diameter of an aluminum rod that would conduct heat at the same rate as a 2.816 cm diameter copper rod of the same length
A block of mass 2.50 kg is pushed 2.60 m along a frictionless horizontal table by a constant 14.0 N force directed 25.0ª below the horizontal. Determine the work done by the normal force exerted by the table
Anita and Nick are playing tug-of-war near a mud puddle. They are each holding on to an end of a taut rope that has a knot exactly in the middle. What is the location of the knot relative to the center of the puddle
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