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Suppose the rotational kinetic energy of a solid disc is 1000 J when the disk has an angular velocity of 3 rad/s. What is the disk's moment of inertia? If the mass of the disk is 50kg what must be it radius?
A charged particle moves in a region of uniform field along a helical path (radius = 1.0 cm, pitch = 6.0 cm) as shown. Illustrate what is the angle between the velocity of the particle and the magnetic field?
An electric iron connected to a 110V source draws 9A of current.show that the amount of heat generated in one minute is almost 60 kj.
Two narrow slits separated by 0.51 mm are illuminated by monochromatic light of wavelength 670 nm. How many bright fringes can be seen on a screen 1.3 cm wide placed 1.1 m in front of the slits.
An organ pipe is open at one end and closed at the other. The pipe is designed to produce the note middle C, What is the frequency of the second harmonic
A space traveler weighs 535 N on earth. What would the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth.
A dentist's drill starts from rest. After 2.70 s of constant angular acceleration it turns at a rate of 3.0 104 rev/min, Find the drill's angular acceleration
A potential difference of ?V = 12.0 V is found to produce a current of 0.40 A in a 3.2 m length of wire with a uniform radius of 0.40 cm, What is the resistivity of the wire
A ranger in a national park is driving at 52 km/h when a deer jumps onto the road 86 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -2.9 m/s2.
A tube is open only at one end. A certain harmonic generted by the tube has a frequency of 470Hz. The next higher harmonic has a frequency of 555Hz. The speed of sound in air is 343m/s.
Determine the heat transfer and work for each of the processes. What is the internal energy change for Process 1-2? What is the internal energy change for Process 2-3? (There is an answer posted for the same question, but the answer does not appea..
A 79 kg pole-vaulter falls from rest from a height of 4.6 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.30 s after landing on the pad. compute the athlete's velocity just before reaching the pad.
A meter stick is pivoted at its 50-cm mark but does not balance because of non uniformities in its material that cause its center of gravity to be displaced from its geometrical center. Find the mass of the meter stick and its location of its cente..
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