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A certain car battery with a 12.0 V emf has an initial charge of 178 A·h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how
Electrodes called paddles are held against the chest on both sides of the heart, and the capacitor is discharged through the patient's chest. Assume an energy of 270 J is to be delivered from a 30.0
A 18.0-V battery is connected to a capacitor, resulting in 45.0 µC of charge stored on the capacitor. How much energy is stored in the capacitor?
A horizontal bar with a mass m suspended from one end is held by a cord with tension T, fastened at a distance D from the end of the bar that is attached to a wall with a frictionless pin. What is
Speedboat A negotiates a curve whose radius is 114 m. Speedboat B negotiates a curve whose radius is 192 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the s
Two railroad cars, each of mass 6500 kg and traveling 87 km/h in opposite directions, collide head-on and come to rest. How much thermal energy is produced in this collision?
Given three parallel conducting plates which are aligned perpendicular to the x-axis. They are labeled, from left to right as plate 1, 2 and 3 respectively. The corresponding plate charges are Q1 =
A 5 kg fish swimming 3 m/s swallows an absent minded 1 kg fish at rest. What is the speed of the large fish immediately after lunch?
A pipe open only at one end has a fundamental frequency of 256 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end. Now, when both pipes
A mass m is being lifted upward by means of a vertical spring of force constant k,with a uniform upward acceleration 'a'.If at the instant its velocity is v= A g.√(3m/k) the upper end of the
The force exerted by the wind on the sails of a sailboat is Fsail = 440 N north. The water exerts a force of Fkeel = 160 N east. If the boat (including its crew) has a mass of 250 kg, what are the
A horizontal desk surface measures 2.08 m x 1.73 m. If Earth's magnetic field has magnitude 0.495 mT and is directed 64.8° below the horizontal, what is the magnetic flux through the desk surfa
Two 10-cm-diameter charged rings face each other, 19.0 apart. Both rings are charged to + 40.0 . What is the electric field strength at the midpoint between the two rings?
The force exerted by the wind on the sails of a sailboat is Fsail = 400 N north. The water exerts a force of Fkeel = 220 N east. If the boat (including its crew) has a mass of 320 kg, what are the
The energy density inside a certain capacitor is 8 J/m^3. What is the magnitude of the electric ?eld inside the capacitor?
The total electric flux from a cubical box 26.0 cm on a side is -1.90 × 103 N·m2/C. What charge is enclosed by the box?
If sunflower blossoms always pointed straight up (as daisies do), what power would the sunflower disk described in part "a" be receiving at 5:00 P.M.?
Imagine a "free" electron and a "free" proton held midway between the plates of a charged parallel plate capacitor. When released, how do their accelerations and directions travel compare?
Draw the force vectors with their tails at the origin of the coordinate system. The orientation of your vectors will be graded. The exact lengths of your vectors will not be graded but the relative
A cart (with wheels) sits on a horizontal table. The front of the cart is a vertical wall, with mass M = 0.908 kg held against the wall. You want to push the cart forward with an acceleration of ma
Find f, the magnitude of the force of static friction exerted by the wall on the block.
Find F, the magnitude of the force, exerted downward along the handle, that will cause the mop to slide across the floor without acceleration.
A block of ice of mass m slides down an incline that makes an angle θ = 28.6o with the horizontal. In trial 1 there is no friction; the block starts at rest and takes time t to reach the bott
A sled of mass M = 384 kg is being pulled along a horizontal surface by a massless rope that makes an angle of θ = 19.1o up from the horizontal. The rope is pulled with a force of magnitude F
A box of mass m = 5.95 kg sits on a frictionless, horizontal table. A heavy rope is attached to the box, and it is pulled horizontally by a force of magnitude F = 64.2 N. (You can ignore any sag in