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A disk starts at rest when a force P is applied to the rope wrapped around the hub. The disk and hub together have a mass of m=5 kg and mass moment of inertia (about the center) I=2 kgm^2. The disk radius is 3 m and the hub radius is 1 m. The disk rolls without slip. If after 1 revolution, the angular velocity of the disk and hub is w=10 rad/s, Find the force P.
A massless spring of constant k = 1000 N/m is fixed on the right side of a level track. A block of mass m = 1.50 kg is pressed against the spring, compressing it a distance d =20.0 cm. The block (initially at rest) is then released and travels tow..
a 1950-kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car
0.20g of hydrogen gas are held in a rigid container. The temperature of the gas is changed from 50 K to 80 K. How much heat is needed.
A jet airplane in level flight has a mass of8.62104kg, and the two wings have an estimated total area of89.0m2. If the speed of air under the wings is232m/s, what is the speed of the air over the wings
The convex lens of a copy machine has a focal length of 25.0 cm. A letter to be copied is placed 40.0 cm from the lens. How far from the lens is the copy paper? The machine was adjusted to give an enlarged copy of the letter. How much larger will the..
A proton orbits a long, uniformly charged wire, making 1.6×10^6 revolutions per second. The radius of the orbit is 1.8 cm. What is the wire's linear charge density
An alpha particle and beta^ {-} particle, each with kinetic energy 35 {rm keV}, are sent through a 1.10 {rm T} magnetic field. The particles move perpendicular to the field. Find the curvature radius for alpha particle's trajectory. Hint: The kine..
A commonly used method of fastening one part to another part is called "shrink fitting." By how many Celsius degrees should the rod be cooled
Calculate the work done by the electric field force on an electron when the electron moves from point O, where the potential is -30.0 V, to point F,
A proton is released from rest, accelerate from one point to another and gain kinetic energy because there is a potential dissimilarity of 1.5μV between the two points, to acquire the same amount of kinetic energy, during what height would the proton..
An electron experiences an electric force of 1nN toward the east. Obtain magnitude and direction of electric field in this point
A Geiger counter initially records 7120 counts/sec from a sample radioactive material. After 45 min it records 4585 counts/sec. Find the half-life of the material?
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