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A broken spaceship is located 10 km above the center of a large circular thin sheet of unknown dust. The sheet has a radius of 10^6km and a density of 7x10^11kg/m^2. The spaceship and the dust attract each other due to the gravitational force. a) Discover the initial acceleration of the spaceship. b) Discover the acceleration of the spaceship right before the spaceship hits the dust. c) What will the astronauts in the spaceship experience right before the spaceship hits the dust?
At t = 0 the current to a dc electric motor is reversed, resulting in an angular displacement of the motor shaft given byθ(t) = (210rad/s)t - (21.5rad/s2)t2 - (1.30 rad/s3)t3. Determine how fast was the motor shaft rotating
A uniform steel beam has a mass of 1860 kg. On it is resting half of an identical beam, What are the vertical support forces
two polarizers are oriented at 46 degrees to each other and a polarized light is incident on them. if only 12 percent
A bat emits a sound whose frequency is 80 kHz. The speed of sound in air at 20.0°C is 343 m/s. compute the wavelength of the sound
In the Challenger Deep of the Marianas Trench, the depth of seawater is 10.9 km and the pressure is 1.16 x 10^8Pa (about 1.15 x 10^3 atm). What is the density of seawater at this depth
A sphere with radius 2 cm is placed at a location near a point charge. The sphere has a charge of -9*10^(-10) C spread uniformly over its surface.The electric field due to the point charge has a magnitude of 470 N/C at the center of the sphere. Wh..
A 11kg hammer strikes a nail at a velocity of 8.7m/s and comes to rest in a time interval of 7.4ms, What is the impulse of the given nail
a positive point charge q1 2.15 times 10-5 c is fixed at the origin of coordinates and a negative point charge q2
a if the length of the achilles tendon increases 0.44 cm when the force exerted on it by the nmb how much work is done
Two point charges q1 = 4.0 ?C and q2 = -8.0 ?C are placed along the x-axis at x1 = 0 m and x2 = 0.20 m, respectively. What is the electric potential energy of this system of charges
You and your friends are doing physics experiments on a frozen pondthat serves as a frictionless, horizontal surface. Sam, withmass 80.0 kg, is given a push and slides eastward. What was the speed of each person before the collision
a spherical shell of radius r carries a uniform charge q. what is the potential at the center of the
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