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A cable is lifting a construction worker and a crate. The weights of the worker and crate are 965 and 1510 N, respectively. The acceleration of the cable is 0.0620 m/s^2, upward. What is the tension in the cable
(a) below the worker and
(b) above the worker?
What is the mean number density of galaxies within the half mass radius? Suppose the typical physical cross section of a galaxy is 10^-3 Mpc^2
The two stars in a certain binary star system move in circular orbits. The first star, Alpha, has an orbital speed of 36.0 Km/s. The second star, Beta, has an orbital speed of 12.0Km/s. What is the mass of the star Alpha
The proper length of one spaceship is 2.8 times that of another. The two spaceships are travelling in the same direction and, while both are passing overhead, an Earth observer measures the two spaceships to be the same length.
A knob on a turning table rotates circularly with a constant speed of 0.78 m/s in a cirlce with radius= 0.35m. What is the maximum acceleration of the shadow
find the ratio of vb to vr, where vr is defined above and vb is the boats speed with respect to the water.
Calculate the verage speed and time lead by the runner using the definition of average speed.
A car moving with an initial speed v collides with a second stationary car that is 49.0 percent as massive. Calculate the final speed of the second car
A two-slit interference experiment is set up, and the fringes are displayed on a screen. How does the fringe pattern change
What is he wavelength of a 22.75*10^9 Hz radar signal. What is the frequency of an X-ray with wavelength 0.12nm
My teacher hasn't gone over chapter 17 yet, and we have aproblem set due tomorrow. Calculate the resistance between opposite faces
A vertical wall (6.1m x 3.5m) in a house faces due east. A uniform electric field has a magnitude of 120 N/C. This field is parallel to the ground an points 33 degrees north of east. What is the electric flux through the wall
It's nighttime, and you've dropped your goggles into a swimming pool that is 4.5m deep. How far are the goggles from the edge of the pool
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