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A 150 pF capacitor is charged to a potential difference of 64 V, and the charging battery is disconnected. The capacitor is then connected in parallel with a second (initially uncharged) capacitor. If the measured potential difference across the first capacitor drops to 30 V, what is the capacitance of this second capacitor?
A ball is being shot from a cannon that is on the ground. the basket is 100m away and is 10m off the ground. How long did this motion take
A spring stretches by 0.0241 m when a 4.15-kg object is suspended from its end. How much mass should be attached to this spring so that its frequency of vibration is f = 4.44 Hz
Consider a beam of electrons passing through a region with crossed electric and magnetic fields. What is the speed (in m/s) of the electrons
A certain gyroscope consists of a uniform disk with a 56 cm radius mounted at the center of an axle that is 13 cm long and of negligible mass. what is the precession rate
Two boats are heading away from shore. Boat 1 heads due north at a speed of 2.94 m/s relative to the shore. find the speed of the passenger relative to the shore
A thin layer of magnesium fluoride (n = 1.38) is used to coat a flint-glass lens (n = 1.61). What atleast thickness should the magnesium fluoride film have if the reflection of 669 nm light is to be suppressed? suppose that the light is incident a..
The windings of a motor have a resistance of 4.0 O. The counter emf of this motor when connected to a 120-V line and running at full speed is 104 V. What is the start up current of this motor
In a circus an elderly performer thrills the crowd by catching a canon ball shot at him. what is his recoil velocity
A fixed line charge +λ on the x-axis extends from x = d to x = 2d, and a fixed line charge -λ on the y-axis extends from y = d to y = 2d. Find the work required to bring a test point charge Q from infinity to the origin. Does the answer depend on the..
A Venturi meter measures fluid speed in a pipe. A constriction (of cross-sectional area A2) is put in a pipe of normal cross-sectional area A1 (A1 = 2A2). Find the ratio of the flow speeds
The period of the moon (the time for a complete revolution) is 27.32 days, Determine the angular velocity of the moon
The highest barrier that a projectile can clear is 14.5 m, when the projectile is launched at an angle of 13.0° above the horizontal. What is the projectile's launch speed
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