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A solid disk rotates at an angular velocity of 0.036 rad/s with respect to an axis perpendicular to the disk at its center. The moment of intertia of the disk is 0.20 kg·m2. From above, sand is dropped straight down onto this rotating disk, so that a thin uniform ring of sand is formed at a distance of 0.40 m from the axis. The sand in the ring has a mass of 0.50 kg. After all the sand is in place, what is the angular velocity of the disk?
rad/s
A circuit consists of a resistor in series with an inductor and an ac generator that supplies an rms voltage of 115 V. Find the average power dissipated in the circuit
Write the general equation of Magnetic force on a current carrying wire of length L in a magnetic field B such that the magnetic field and the current direction make an angle different than 0^0 and 180^0
An airplane pilot wishes to fly due west. A wind of 80.0is blowing toward the south. What is the speed of the plane over the ground
The capacitance of three capacitance are 10 ?f, 15 ?f and 20?f , connected in series of combination by a copper wire. what is the charge on each capacitor
A car is driving directly north on the freeway at a speed of 114 km/h and a truck is leaving the freeway driving 92 km/h in a direction that is 30° west of north
Charges of 4.0 µC and -6.0 µC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field magnitude created by these two charges
You are standing at rest with respect to the earth holding a lance which you measure as 10 meters long and a knight traveling on horseback at .7c is holding a lance which he measures as 10 meters long. Which lance hits the other person first
A uniform disk of radius 0.463 m and unknown mass is constrained to rotate about a perpendicular axis through its center. Find the mass of the disk
the wire unwinds without stretching or slipping, causing the pulley to rotate. Explain how far must the stone fall so that the pulley has 2.70 J of kinetic energy?
what is the distance between town and john's current location? Illustrate what is john's current location?
A light bulb is placed 22.3 cm in front of a concave mirror. Calculate the focal length of the concave mirror
The velocity of a plane relative to still air is 135 mr/hr. The pilot wants to fly straught north over the ground. What is the direction of the wind relative to the ground
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