How much force pulls on the block of ice
A 2.0-m-long, 500g rope pulls a 10kg block of ice across a horizontal, frictionless surface. The block accelerates at 2.0m/s^2. How much force pulls on the block of ice and how much force pulls on the rope?
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In addition, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. What is the acceleration of the child and sled?
A weak monoprotic acid is exactly neutralized by 11.17mL of a standardized 0.1455M NaOH solution. If the Ka of the acid is 0.00084, what is the pH at the half-equivalence point?
A 1.70-g sample of a large biomolecule was dissolved in 11.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point c
A buffer is prepared by mixing mL of .452 M HCl and .500 L of .400 M sodium acetatae. How many grams of KOH must be added to .500 L of the buffer to change the pH by .175 units.
A student adds 6.90 of a 0.380 solution to the beaker. How much will the pH change? The of acetic acid is 4.760.
A person throws a stone straight upward at an initial speed of 15 m/s on a bridge that is 25m above the surface of the water. If the stone just misses the bridge on the way down, What is the speed of the stone just before it hits the water?
In an experiment, 5.00 L of N2 is saturated with water vapor at 22°C and then compressed to half its volume at constant T.
One mole of an ideal gas is sealed in a 22.4-rm L container at a pressure of 1.00 rm atm and a temperature of 273 rm K. The temperature is then increased to 305 rm K, but the container does not expand. What will the new pressure be The most approp
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