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The model airplane in Figure 5.7 is flying at a speed of 13.2 m/s on a horizontal circle of radius 17.9 m. The mass of the plane is 1.18 kg. The person holding the guideline pulls it in until the radius of the circle becomes 11.3 m. The plane speeds up, and the tension in the guideline becomes four times greater. What is the net work done on the plane?
Suppose Fuzzy, a quantum-mechanical duck, lives in a world in which h = 2?J · s. What is the minimum uncertainty in the duck's speed
Two charged particles are located on the x axis. The first is a charge +Q at x = -a. The second is an unknown charge located at x = +3a, What are the two possible values of the unknown charge
A string is wrapped around a pulley of radius 3.60cm , and a weight hangs from the other end. calculate the angular acceleration of the pulley
What is the speed of a beam of electrons when the simultaneous influence of an electric field of 1.48×104V/m and a magnetic field of 4.66×10?3T, What is the period of the orbit
John's face is 20 cm in front of a concave shaving mirror of focal length 30 cm. How large an image does he observe
The distance between atoms in a solid is typically around 2.0 x 10-10 m What is the wavelength of an electron with a kinetic energy of 110 eV
A 2,200-kg car moving east at 10.0 m/s collides with a 3,000-kg car moving north. The cars stick together and move as a unit after the collision, Find the speed of the 3,000-kg car before the collision
As a 1.00 cm diameter plunger reduces the height of the column of air inside the chamber from 7.00cm down to 0.50cm, the temperature inside increases from 20C to 210C. Determine the air pressure inside the chamber (in atm) after compression if the..
A 40 kg child sits in a swing suspended with 2.5 m long rope. Use energy conservation to determine the speed the child will have at the bottom of the arc when she is let go
An ac generator has a frequency of 6.5 kHz and a voltage of 35 V. When an inductor is connected between the terminals of this generator, What is the inductance of the inductor
If the current price of July WTI futures is $87 and the strike price is $86, illustrate what is the intrinsic value of this call? Illustrate what is the time value?
The Sun radiates energy at a rate of about 4×1026W. At what rate is the Sun's mass decreasing
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