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An audio amplifier, represented by the AC source and theresistor R delivers alternating voltages at audio frequencies tothe speaker.
If the source puts out an alternating voltage of 15.0V(rms),the resistance R is 8.20, and the speaker is equivalent to aresistance of 10.4, what is the time-averaged power delivered to the speaker?
Two carts on a frictionless air track are made to travel toward each other. As they collide they stick together. if the cart on the left has a mass of 250 grams and is moving at 0.2 meters per second to the right.
During a physics experiment, helium gas is cooled to a temperature of 19.0K at a pressure of 6.00×10?2atm. find the rms speed of the atoms
A cube of ice is taken from the freezer at -8.4^circ C and positioned in a 114 g aluminium calorimeter filled with 322g of water at room temperature of 20.0 C. The final situation is observed to be all water at 15.0C.
A hollow, spherical shell with mass 2.40 kg rolls without slipping down a slope angled at 39.0 degrees. Find the friction force
A 63.00 kg person on skis starts from rest down a hill sloped at 33° from the horizontal. The coefficient of friction between the skis and the snow is 0.190.
The arrangement is, in effect, a hollow tube of current 2.1A. find the magnetic field outside the cylinder
In the figure, two masses, each 24 kg, are at rest and connected by the pulley. the pulley is massless and frictionless. Use Energy and work to find. a) the speed of the masses after thay have moved 1.6 m assumming the surface is frictionless.
Assume a water strider has a roughly circular foot of radius 0.01 mm. What is the maximum possible upward force on the foot due to surface tension of the water
Fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to report the mass truthfully). How far apart are the half-kilogram marks on the scale
Light behaves primarily as a wave when it...
A slingshot sends a projectile straight up. It reaches maximum height 1.75 seconds later. What was the projectile's initial velocity
A closely wound coil has a radius of 6.30 cm and carries a current of 1.70 A. How many turns must it have if, at a point on the coil axis 6.30 cm from the center of the coil
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