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A 5.90 x 10-5 H solenoid is constructed with wrapping 79turns of wire around a cylinder by a cross-sectional area of 8.7x 10-4 m2. When the solenoid is shortened by squeezing the turns closer together, the inductance increases to8.80 x 10-5 H. Decide the change in the length of the solenoid.
Two sounds differ in intensity level by 4.62 dB. What is the ratio of the intensities of these two sounds? (Let I1 be the intensity of the first (higher) sound and I2 be the intensity of the second (lower) sound.)
A uniform 2.45- kg spinning disk with a radius of 0.323 m is brought to rest by a brake-pad pressed against the side 0.226 m from the rotation axis. What frictional force was applied by the brake pad
a parallel plate capacitor has an air dielectric. the capacitor is charged with surface charge density s0 and then the
A certain automobile engine delivers 2.39 104 W (32.0 hp) to its wheels when moving at a constant speed of 25.0 m/s ( 56 mi/h). What is the resistive force acting on the automobile
Three forces of magnitudes F1 = 4.0 N, F2 = 6.0 N, F3 = 8.0 N, F4 = 5.0 N, and F5 = 5.0 N are applied to a block of mass m = 3.0 kg, initially at rest, at angles shown on the diagram. (Figure 1) All angles should be measured from the positive x ax..
A softball of mass 0.220 kg that is moving with a speed of 8.5m/s collides head-on and elastically with another ball initially atrest. compute the velocity of the target ball after the collision
How much work is done by an applied force that moves two charges of +5.0 µC that are initially very far apart to a distance of 4.6 cm apart?
a sled of mass m is given a kick on a frozen pond. the kick imparts to it an initial speed of 2.80 ms. the coefficient
A water storage is filled with freshwater to a depth of 6.4m. It has a circular basin with an Area of 30m^2, What is the weight (force) of the water the basin supports
A 60 kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 0.7 m/s. determine her altitude as she crosses the bar
An observer stands 23.1 meter behind marksman practicing at a rifle range. Calculate how far does each bullet travel before the observer hears the report of the rifle
An ancient club is found that contains 120.00 g of pure carbon and has an activity of 7 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.10x10-12. Note that half life of carbon-14 is 5700 yea..
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