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An astronaut is orbiting a black hole with a mass of2.0x1031 kg at a distance of 126km from its center. The astronaut is positioned in the spacecraft so that his 0.10kg cheeksare 0.050m on either side of the orbital circle. What is the net tidal force pulling his cheeks apart? G=6.67x10-11Nm2 /kg2.
A particle with a charge of 4.10nC is in a uniform electric field E? directed to the left, What work was done by the electric force and What is the magnitude of E
An electron of kinetic energy 1.44 keV circles in a planeperpendicular to a uniform magnetic field. The orbit radius is 22.7cm. Find (a) the electron's speed,(b) the magnetic field magnitude,(c) the circling frequency (in Hz), and(d) the period of th..
a pellet gun fires ten 2.9 g pellets per second with a speed of 540 ms . the pellets are stopped by a rigid wall. what
Two identical resistors are connected in parallel across a 23Vbattery, which supplies them with a total power of 8.7W. While thebattery is still connected, one of the resistors is heated so thatits resistance doubles. The resistance of the other r..
It is desired that 5.5 microcoulomb of charge be stored on each plate of a 2.5 microF - capacitor. What potential difference is required between the plates
A box is put on a slide to move it from one part of a factory to another the slide is at an angle of 20 degrees below the horizontal the coefficient of friction between the box and slide is 0.352 what is the acceleration of the box.
for a room to be characterized as acoustically intimate the 1st reflection should arrive no more than 20 ms 0.020 s
The weight of the block on the table is 484 N and that of the hanging block is 165 N. Ignore all frictional effects, and assuming the pulley to be massless. Find the acceleration of the two blocks
An inductor has a cross-sectional area of .03m2 and a length of 4 cm. When the current running through it changes from 6A to 10 A in .2 s
Europa, a moon of jupiter, has an orbital radius of 6.70 x10^8 m, and a period of 3.55 days. What is the mass of Jupiter
A 400 g mass is attached to a spring of constant k=16.0 N/m and set into oscillation with amplitude A=25.0 cm, Find the totall mechanical energy E of the oscillator
a block is on a horizontal surface a shake table that is moving back and forth horizontally with simple harmonic motion
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