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Balance a long uniform ruler on one finger so that the largest extension of the ruler is at ninety degrees to the ground. Do the same with a short uniform ruler. Explain the behaviour of the rulers. explain scientific principles and the accuracy of statements. I don't get this. Please draw a diagram and explain in sentences.
At Zion National Park a loud shout produces the echo 3.40 s later from a colourful sandstone cliff. How far away is the cliff.
The Olympic Flame at the 1992 Barcelona Olympics was lit by a flaming arrow shot from a point 60 meter horizontally and 24 meter vertically from the flame. Find the initial speed necessary for the arrow
A boat with a speed of 10.0 m/s aims directly across a 250-m-wide river. If the water current is 2.00 m/s, how far downstream will the boat be when it reaches the other side
If the maximum acceleration that is tolerable for passengers in a subway train is 1.99 m/s2 and subway stations are located 790 m apart, What is the travel time between stations
Calculate the mass M of the piece of aluminum sheet shown in the figure above. Calculate the x-coordinate of the center of mass of the piece of aluminum sheet shown in the figure.
A ball is thrown upward from the ground with an initial speed of 14.4 m/s; at the same instant, another ball is dropped from a building 14 m high. After how long will the balls be at the same height
a current of 0.77 a flows through a copper wire 0.47 mm in diameter when it is connected to a potential difference of
The barricade at the end of subway line has a large spring designed to compress 2.00 m when stopping a 1.00 x 10^5 kg train moving at 0,500 m/s. What speed would the train be going if it only compressed the spring 0.500 m?
when it is very far from the asteroid it will be traveling with speed 187 m/s. We have a large and powerful spring whose stiffness is 3.0 105 N/m. Explain how much must we compress the spring?
Consider a very small charged sphere that contains 39 electrons. At what distance from the center of the sphere is the potential equal to -25 V
A 10-m long plank with a mass of 15-kg is supported at each. A 70 kg person stands on the plank between the supports. how far is the person standing from the left support
How much power,( answer given in both watts and HP ), must you exert horizontally to drag a 25kg table, 10m across a brick floor in 30s at a constant speed if the coefficient of kinetic friction is 0.550 ?
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