Math
1. P = positive results / total attempts. In this case, 11/50 = .22 = 22% 2. Increase the sample size. The more data he accrues, the closer the experimental probability will be to the theoretical probability.
Chemistry
1. You are correct. The strength of a weak acid is proportional to its dissociation constant, which is directly proportional to the concentration of ions and inversely proportional to the concentration of the undissociated acid molecules. 2. Yes, this is correct. The pH decrea...
physics help please
My answers would be a, b, and d, where b and d are the same force. This assumes you are traveling very fast.
College chemistry
This is an example of a combustion reaction involving a hydrocarbon (in this case propane) reacting with oxygen. The products of such reactions are almost always water and carbon dioxide. C3H8(g) + O2(g) → H2O + CO2 First balance the number of Carbons on both sides. Ther...
chemistry
You are actually really close. First remember that ΔG = Greactants - Gproducts. In this case the equation is: Ba2+ + NO3- -> Ba(NO3)2 But that equation isn't balanced! For this to work you have to balance the equation first like so: Ba2+ + _2_NO3- -> Ba(NO3)2 Th...
physics
A +50 micro coulomb and 30 micro coulomb charge are placed 50cm apart. a)what is the direction and magnitude of thee electric field at a point P, in between them, that is 10cm from the 30 micro coulomb charge? b)if an electron is placed at rest P, what will its acceleration be...
physics
A +50 micro coulomb and 30 micro coulomb charge are placed 50cm apart. a)what is the direction and magnitude of thee electric field at a point P, in between them, that is 10cm from the 30 micro coulomb charge? b)if an electron is placed at rest P, what will its acceleration be...
MATH
if I scored 72 out of a 100, what do i need to score to bring up may average to 80%
Physics
HELP! A tennis ball is attached to a .8m long string whirled around in a circle with a constant frequency of 1.2 Hz. What is the linear(tangential) velocity of the tennis ball?
physics
A wooden box weighing 271 N is pushed across the floor by a workman who exerts a horizontal force of 144 N. If the force of friction between the box and the floor is 28 N, what is the acceleration (in meters/second^2) of the box?
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