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A student tries to raise a chain consisting of three identical links. Each link has a mass of g. The three-piece chain is connected to a string and then suspended vertically, with the student holding the upper end of the string and pulling upward. Because of the student's pull, an upward force of N is applied to the chain by the string. Use Newton's laws to answer the following questions.
a- Find the acceleration of the chain. Take the free fall acceleration to be g m/s2
b- Find the force exerted by the top link on the middle link.
A blue ball is thrown upward with an initial speed of 24.3 m/s, from a height of 1 meters above the ground. What is the speed of the blue ball when it reaches its maximum height
One proposed fusion reaction combines lithium 3Li6 (6.015 u) with deuterium 1H2 (2.014 u) to give helium 2He4 (4.003 u): 1H2 + 3Li6 ----> 22He4. How many kilograms of lithium would be needed to supply the energy needs of one household for a year, est..
Why do we write F=Gm1m2/d2 for the gravitational force on an object when it is far from the Earth but F=mg for the gravitational force on it when it is near the Earth's surface?
Thermal conductivity for the pine wood block is 0.81 Btu ft/hr ft2 ?.
In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 22m/s at an angle of 39 degrees above the horizontal. How high is the ball when it hits the wall
Estimate the particle density necessary for bose-Einstein condensation of a hydrogen gas to occur at 100 nK. find the ratio of the thermal wavelength to the atom spacing
A uniform layer of water (n = 1.33) lies on a glass plate (n = 1.52). Light shines perpendicularly on the layer. Because of constructive interference, the layer looks maximally bright when the wavelength of the light is 403 nm in vacuum and too when ..
A quantity of water, initially at 10oC, is brought into contact with a hear reservoir at a temperature of 90oC. What is the entropy change of the entire system
Assess the challenges of managers providing accurate,
A converging lens with a focal length of 12.9 cm and a diverging lens are placed 25.5 cm apart, with the converging lens on the left. What is the focal length of the diverging lens
A spherical mirror is to be used to form an image, five times as tall as an object, on a screen positioned 4.2 m from the mirror. Describe the type of mirror required
A beaker contains a thick layer of oil (shown in green) of density floating on water (shown in blue), which has density . A cubical block of wood of density with side length is gently lowered into the beaker, so as not to disturb the layers of..
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