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A charged 2uF capacitor is connected in parallel with 0.5 MOhm resistor. a) How long after the connection is made with the voltage across the capacitor to 75% of its maximum value. b) How much thermal energy will be dissipated across the resistance after three time constants?
An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.4 m (8 ft) is connected to an electric heater which draws 13.5 A on a 120-V line
If the phase angle for a block-spring system in SHM is pi/6 rad and the block's position is given by x = xm cos(wt + pi). what is the ratio of the kinetic energy to the potential enery at time t = 0
A physics professor requires reading glasses with +1.6 D power toread a book held 39.1 cm away with a relaxed eye. Assume theglasses are 2.5 cm in front of his eyes. What is his uncorrected far point
A 0.42 kg ball is dropped from rest at a point 1.30m above the floor. The ball rebounds straight upward to a height of 0.580 m. What are the magnitude and direction of impulse of the net force applied to the ball during the collision with the floo..
A ping-pong ball of mass 2 gm and traveling with a velocity of 2 m/s collides with stationary tennis ball of mass 10 gm. Calculate the velocity of the ping-pong ball after the collision
A magnifying glass with focal length 15 centimeters is placed 10 centimeters above a stamp. find Where is the image situated
The atronomer was studying the moon of jupiter called lo. He noticed that measurements taken in the spring when used to predict the position of lo in the fall were off by 18.177 minutes of time. determine the value of the speed of light that Roemer..
The wheels of a wagon can be approximated as the combination of a thin outer hoop, of radius rh = 0.315 m and mass 4.89 kg, what should the radius of the disk be
What is the amplitude of the oscillations . Could you think of a simple method for determining the focal length of a converging lens.
A heat engine operates as a reversible Carnot cycle transfers 6.0 kW of heat from a reservoir at 1000 K, Calculate the power output of this engine
A certain speed boat weighs 5,880 N. It can accelerate from 0 to 40 m/s in 5 seconds. (Need to see the math). How large is the net force acting on the boat
A parallel-plate air capacitor of area A=16.0cm2 and plate separation d=3.40mm is charged by a battery to a voltage 52.0V. how much additional charge will flow from the battery onto the positive plate
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