physics
how do you find time when all you're given are two different speeds the height and the angle?
physics
A toy rocket is traveling to the right at 15.0 m/s when it undergoes a constant acceleration 3.00 m/s^2 to the left how long does it take before the rocket stops moving to the right? what distance does the rocket travel before it stops moving to the right? what distance does i...
chemistry
A gaseous mixture in a 25.00 L container is made of 16.0 g N2 and 14.0 g Ar and has a total pressure of 1.00 atm. 1.Calculate the partial pressure of the N2 in the mixture. the ans is 0.620 atm 2.Calculate the temperature of the gas mixture. can someone explain to me how to do...
chemistry
cold water mass of calimeter+ water: 68.66g mass of calimeter: 19.19g mass of water: 49.47g final temperature of water: 39.1C initial temperature of water: 25.5C delta(T) of water: 13.6C hot water mass of calimeter+ water: 79.55g mass of calimeter: 20.61g mass of water: 58.94g...
physics
A 62.7-kg person jumps from rest off a 2.98-m-high tower straight down into the water. Neglect air resistance. She comes to rest 1.09 m under the surface of the water. Determine the magnitude of the average force that the water exerts on the diver. This force is nonconservativ...
physics
A 65.0-kg skier coasts up a snow-covered hill that makes an angle of 27.4° with the horizontal. The initial speed of the skier is 6.37 m/s. After coasting 2.07 m up the slope, the skier has a speed of 4.06 m/s. Calculate the work done by the kinetic frictional force that a...
physics
A cable lifts a 1220-kg elevator at a constant velocity for a distance of 39.7 m. What is the work done by the tension in the cable? can someone help me with this the answer is supposed to be in joules i tried doing it by 1220(9.81)(39.7) = 475137J but that is not the answer c...
chemistry
A total of 2.00mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 185g of solution. The reaction caused the temperature of the solution to rise from 21.0 to 24.7C . What is the enthalpy of this reaction? Assume that no heat is lost ...
chemistry
A piston has an external pressure of 9.00 atm. How much work has been done if the cylinder goes from a volume of 0.130 liters to 0.500 liters? can someone explain to me how am i supposed to do this please? Thanks :D
chemistry
In the following experiment, a coffee-cup calorimeter containing 100mL of H2 is used. The initial temperature of the calorimeter is 23.0 C . If 3.40g CaCl2 of is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The heat of soluti...
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