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An electrically neutral model airplane is flying in a horizontal circle on a 3.0-m guideline, which is nearly parallel to the ground. The line breaks when the kinetic energy of the plane is 50 J. Reconsider the same situation, except that now there is a point charge of +q on the plane and a point charge of -q at the other end of the guideline. In this case, the line breaks when the kinetic energy of the plane is 51.5 J. Find the magnitude of the charges.
Two point charges, q1 = 2.0 pC and q2 = -2.0 pC, are separated by 5.6 µm. 1) What is the dipole moment of this pair of charges?
How much time is necessary to catch the car
Explain the di?erences between the electron energy spectrum of β- decay and that from an internal conversion process. What are the di?erences of these two decay mechanisms?
A mass attached to a spring vibrates 15 times in 23.13 seconds. What is the linear frequency (in Hertz) of the mass
a superball with mass equal to 50 grams is dropped from a height of 1.5m . It collides with a table, then bounces up to a height of 1m. Find the y component of the momentum of the ball immediately before the collision
A steel cable is to support an elevator whose total (loaded)mass is not to exceed 3100kg. calculate the diameter of the cable required
If an electron is confined to a region of size 43.0 nm, what is the minimum possible uncertainty in its momentum? 1.22E-27 kg * m/s The nucleus of a hydrogen atom is a single proton. What fraction of a hydrogen atom is occupied by the nucleus
A solid sphere of uniform density starts from rest and rolls without slipping down an inclined plane with angle ? = 30.0o. The sphere has mass M = 8.0 kg and radius R = 0.19 m . The coefficient of static friction between the sphere and the plane is ?..
A human wearing cloths has about 1.0 m^2 of exposed skin. How much power does a typical human loose due to radiation
a teacher standing in a doorway 1.0 m wide blows a whistle with a frequency of 1000 hz to summon children from the playground. which boy may not hear the whistle
A point charge +6.7 uC is placed at the origin, and a second charge -3.6 uC is placed in the X - Y plane at (0.40 m , 0.55 m ). Where should a third charge be placed in the plane so that the net force acting on it is zero? Express your answers usi..
A bicyclist is riding a bicycle on a flat road. (Figure 2) The combined mass of the bicyclist and bicycle is = 110 , the radius of each wheel is = 32.5 , and the coefficient of rolling resistance between the tires and the road is = 0.170 . The ped..
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