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an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 72 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 40.0 N, T2 = 32.0 N, and T3 = 8.0 N. What are the masses of each disk?
Treat the ball as a uniform, solid sphere, ignoring the finger holes. Illustrate what is the acceleration of the center of mass of the ball?
Suppose the peak of a particular star's spectrum occurs at about 6000 Å (Angstrom). (a) Use Wien's law to calculate the star's surface temperature. (b) If this star were a factor of four hotter, at what wavelength would its spectrum peak? In what ..
What is the horizontal distance the airplane engine falls. find out the time that was recorded on Earth.
A uniform plank of length 4.3 m and weight 201 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x could a person who weighs 449 N walk on the overhanging part of the p..
In heavy rush-hour traffic you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5 minutes, and finally you drive at 15 m/s for another 2.5 minutes. compute the average velocity between t=0 and t=7.5 minutes.
The outside mirror on the passenger side of a car is convex and has a focal length of -7.7 m. Relative to this mirror, Find the image distance of the truck.
Three point charges are placed at the corners of an isosceles triangle. At the left and right end points of the base are 6 micro coulomb and 6 micro coulombrespectively, What is the magnitude of the electric field at the midpoint of the baseline
so hydrogen atoms have a thermal velocity of about 1000 m/s. How does the energy stored in the magnetic field compare with the kinetic energy in a given volume of space.
Helium gas with a volume of 2.55L , under a pressure of 1.26atm and at a temperature of 44.0?C, How many grams of helium are there? The molar mass of helium is 4.00g/mol
You hold a ruler that has a charge on its tip 2 cm above a small piece of tissue paper to see if it can be picked up, What is the minimum charge required to pick up the tissue paper
A point source of light is 200 cm below the surface of a body of water. Find out the diameter of the circle at the surface through which light emerges from the water.
A 5.0g- lead bullet is fired into a fence post. The initial speed of the bullet is 240m/s, How much does the bullets temperature increase
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