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During an eclipse, the Sun, Earth, and Moon are arranged in roughly a straight line. There are two types of eclipse, a lunar eclipse, when Earth is between the Sun and the Moon, and a solar eclipse, when the Moon is between the Sun and Earth. Calculate the percentage change in your weight when going from one type of eclipse to the other.
A capacitor has a very large capacitance of 10 F. The capacitor is charged by placing a potential difference of 2V between its plates. How much energy is stored in the capacitor
Two people are carrying a uniform wooden board that is 3.00 m long and weighs 160 N. If one person applies an upward force equivalent to 60 N at one end, at what point does the other person lift . If the tangential acceleration of a yo-yo at the en..
makes an angle of 45 degrees with the horizontal by an external force. The object moves up the incline a distane 3m. What is an increase in the gravitational energy of the object
The 4 block in the figure is attached to a vertical rod by means of two strings. When the system rotates about the axis of the rod, the strings are extended and the tension in the upper string is 77.
A car whose initial speed is 40 m/s undergoes a constant acceleration of -5 m/s2 for 6 s when its brakes are applied. How far does the car travel
What is the minimum cross-sectional area required of a vertical steel cable from which is suspended a 270 kg chandelier, If the cable is 7.5 m long how much does it elongate
Two loudspeakers in a 20°C room emit 629 Hz sound waves along the x-axis, If the speakers are out of phase, what is the smallest distance between the speakers for which the interference of the sound waves is constructive
A small rock is thrown vertically upward with a speed of 18.0 m/s from the edge of the roof of a 40.0 m tall building. What is the speed of the rock just before it hits the street
A ship travels 155 km from the port on a course of 35 degrees south of west to an island, then it travels 142 km east of south to a second island, Find the displacement from the starting point to the ending point
Percy did 1000 joules of work and exerted a power of 2 watts. How many seconds did Percy take to do his work
A Galilean design telescope is to be made with an objective of focal length 450 mm with an angular magnification of 18. What should the focal length of the eyepiece be
A textbook of mass 1.91 kg rests on a frictionless, horizontal surface. compute the tension in the part of the cord attached to the book
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