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A protostar has a temperature of 3000 K,radius of 2*10^8 km at stage 4. At stage 6, it has a temperature of 4500 K and a radius of 1*10^6 km. Calculate the star's change in absolute magnitude as it evolves from stage 4 to stage 6.
Compute direction of the plane's velocity, relative to the ground. Compute how far from its intended position it will be after 15.0 if the pilot takes no corrective action.
How much work did the movers do (horizontally) pushing a 190-{rm kg} crate 11.2 m across a rough floor without acceleration, if effective coefficient of friction was 0.60.
A thin ring of radius R carries a charge 3Qdistributed uniformly over three-fourths of its circumference, and -Q over the rest
Draw a sketch that shows the distribution of dipoles in a ferromagnetic solid in zero applied magnetic field. Illustrate what is the name given to internal interaction acting on the dipoles
A typical power plant uses some fuel as the source of heat (QH) to drive a heat engine that does work (W) to drive a generator that is connected to the electrical grid. Inevitably, waste heat (QC) is dumped into a river or lake. Analysis of the pl..
A 8.97-cm-long thin glass rod is uniformly charged to +40.5 nC. A small glass bead, charged to +5.3 nC, is 4.92 cm from the center of the rod, What is the force (magnitude) on the bead
An object with a charge of 0.980 µC is placed at the center of a regular icosahedron with 20 equivalent surfaces. What is the electric flux through one surface of the icosahedron?
The car encounters a loop of radius R = 18 m at ground level. As you will learn in the course of this problem, the initial height 54.00 m is great enough so that the car never loses contact with the track.
A thin, horizontal, 10-cm-diameter copper plate is charged to 3.5nC. If the electrons are uniformly distributed on the surface, what are the strengths and direction of the electric field
A 3.2 kg block of wood sits on a table. A 3g bullet, fired horizontally at a speed of 490 m/s, goes completely through the block, emerging at a speed of 250m/s. What is the speed of the block immediately after the bullet exits.
Suppose that the separation between two speakers A and B is 4.40 m and the speakers are vibrating in-phase, What is the largest possible distance between speaker B and the observer,
A 10 resistor, 10 mH inductor, and a 110.0 µF capacitor are connected in series to a 50.0 V (rms) source having variable frequency. Find out the energy delivered to the circuit during one period if the operating frequency is twice the resonance fr..
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