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Q.8 When a potential difference of 221 V is applied to two plates of a parallel-plate capacitor, the inner surface of the positive plate carries a surface charge density of 40 nC/cm2 . The permittivity of a vacuum is 8.85419 × 10^?12 C 2 /N · m2 . What is the spacing between the plates? Answer in units of µm
Two 1.50-V batteries-with their positive terminals in the same direction-are inserted in series into the barrel of a flashlight. What is the bulb's resistance
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm(red) and 486 nm (blue). What is the distance between the first-order red and blue fringes? (d=)
A large bouncy ball with a mass of 209 g is dropped straight down and then bounces back up to a height that is slightly lower than the point from which it was dropped. compute the magnitude of the average force that the floor exerts on the ball
An unstable particle is at rest and suddenly breaks up into two fragments. No external forces act on the particle or its fragments. What is the velocity of the more massive fragment
A rocket is launched at an angle of 52° above the horizontal with an initial speed of 103 m/s. The rocket moves for 3s along its initial line of motion with an acceleration of 32 m/s2. At this time, its engines fail and the rocket proceeds to move..
If the coefficient of static friction is 0.951, illustrate what is the maximum speed that the car can take without skidding?
A 20g ball of clay traveling east at 3.0m/s collides, What is the speed of the resulting ball of clay
The minimum stopping distance for a car traveling at a speed of 30 {m/s} is 60 {m}, including the distance traveled during the driver's reaction time of 0.50 {s}.What is the least stopping distance for the same car traveling at a speed of 41 {m/s}..
A 5 g bullet moving with an initial speed of 530 m/s is fired into and passes through a 2 kg block. find the speed at which the bullet emerges from the block
A set of crash tests consists of running a test car moving at a speed of 11.8 m/s (26.4 mi/hr) into a solid wall. Calculate the size of the average force which acts on the dummy during that time
an electron microscope accelerates an electron (mass of electron is 9.11x10^-31 kg) from rest to 2.8 x 10^7 m/s in a distance of 2.80 cm, what is the average force on the electron
a long horizontal wire carries a current of 48 amps. A second wire, made of 2.5 mm diameter copper wire, determine direction of the current in the lower wire
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