A spring has a natural length
A spring has a natural length of 26 cm. If a 26 N force is required to keep it stretched to a length of 30 cm, how much work W is required to stretch it from 26 cm to 37 cm? (Round your answer to the nearest hundredth.)
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The leathal inhalation does of sarin for a 200 pound person has been determined to be .0015mg. Determine the LD50 of Sarin that researchers used to calculate the leathal inhalation dose?
What volume of O2 will form in 66.4 seconds at a barometric pressure of 703.0 . (The vapor pressure of water at this temperature is 17.5 )
A 155 gram sample of copper was heated to 150 degrees Celsius then placed into 250 gram of water at 19.8 degrees Celsius. Calculate the final temperature of the mixture.
A 12 kN force is exerted on a rocker arm. The moment of inertia (I) of the crosssection with respect to the neutral-axis is 43.3x10-9 m4.
How many liters of water can be made from 55g of oxygen gas & an excess of hydrogen at a pressure of 12.4 atm & a temp of 85 degrees C?
How many grams of caffeine (C8H10N4O2) are present in one cup of coffee that contains 8.98 × 1021 caffeine molecules?
What is the value of the equilibrium constant for the neutralization of acetic acid with sodium hydroxide? The Ka for acetic acid is 1.8 x 10-5.
A reaction has an activation energy of 123 kJ/mol and a rate constant of 0.200 s-1 at 311K. At what temperature will the rate constant be double that at 311 K?
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