Magnitude of the acceleration of the boy toward the girl
Suppose a 64-kg boy and a 48-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.
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Dilute solutions of NaCl, Na2SO4, and Na2S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order?
In a coffee-cup calorimeter, 1.70 g of NH4NO3 is mixed with 79.0 g of water at an initial temperature of 25.00°C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.67°C. Assuming the solution has a heat
A baseball is thrown at an angle of 28 degrees relative to the ground at a speed of 25.6m/s. The ball is caught 55.3841m from the thrower. The acceleration due to gravity is 9.81m/s square. How long is it in the air ?
How many moles of sodium phosphate are required to react completely with 4.6 mol of calcium nitrate to form sodium nitrate and calcium phosphate?
A superhero flies 156 m from the top of a tall building at an angle of 35 ? below the horizontal. What is the vertical component of the super-hero's displacement?
15.0 moles of gas are in a 8.00L tank at 24.6°C . Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a=2.300L2⋅atm/mol2 and b=0.0430 L/mol.
What was the final temperature of the gold if the initial temperature was 22.0°C? The specific heat of gold is 0.129 J/(g·°C).
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