Recent content by Corky

What volume of 50% NaOH (by weight) solution is necessary to prepare 1 litre of 0.1M NaOH? Assume that the density of the NaOH solution is 1.53g/ml.

(1 + x^1/2)/x <= ((1 + x^1/2)/x)^1/2 for all x >= 1. Thus since the integral of(1 + x^1/2)/x diverges as does the original function. Thanks

I have to use the comparison theorem to find if the function converges or diverges. Any ideas as to what I can use to compare the function to?? integrate: sqrt(1 + sqrt(x))/sqrt(x)dx Using the comparison theorem!

got it thanks

All right, so: W(balloon) + W(package) W(helium) = F(bouyant) 4973.67 + 41398.2 + [0.179 * volume * 9.81](heluim) = F = 1.29 * volume * 9.81 But what do I put if for volume..??

A 507kg weather balloon is designed to lift a 4220kg package. What volume should the balloon have after being filled with helium at STP in order that the total load can be lifted. I have no idea how to start this problem...

Nice thanks

The problem states: A microphone in the ocean is sensitive to sounds emitted by popoises. To produce a usable signal , sound waves striking the microphone must have an intesity of 10.6 dB. If porpoises emit sound waves with a power of 0.0502 W, how far can a porpoise be from the microphone and...

I have a structure of KNO3, and a question I have asks for the NO bond number. The answer, aparently, is 4/3. The equation I am trying to use Bond order = 0.5(Bonde electrons - antibonding electrons. I simply can't get 4/3 though.

Does anyone know what border is.

All right, at this point I have subtract tention left (w = 10791N) from tention right (14600N)and got a net force of 3809N. I used the equation [I(moment of intertia)= 0.5mr^2] to calculate the mass of the disk to be 291.2kg. Then I used the net force, 3809, with the equation F=ma to find the...

Oh right forgot about that detail. Well I caculated weight = mass * gravity for the tension on the leftn side of the pully to be (1100kg) * (9.81) and from there I am not really sure. I would expect to have to subtract the given motion of inertia from the tention on the right, and then subtract...

A motor raises a mass (m = 1100kg), it produces a tension of 1.46 *10^-4 in the cable on the right side of the pulley. the pulley has a moment of inertia of 73.8Kg*m^2 and a radius of 0.712m. The cable rides over the pulley without slipping. Determine the acceleration of mass m. The question...

How do I derive the formula 'Sin(a+b)=sinacosb + cosasinb' from the unit circle. Any ideas would be appreaciated our study group tried and failed.