Physics Answers

an electron at rest is accelerated through a potential of 5000V. Calculate the de-brogile wavelength of matter wave associated with it.

Determine (a) the peak frequency deviation, (b) minimum bandwidth, and (c) baud for a binary FSK signal with a mark frequency of 38 kHz, a space frequency of 40 kHz, and an input bit rate of 4 kbps.

An isolating electrically sphere of radius r and charge Q is supported on an insulator in air of permittivity write down an expression for the electric field intensity on the surface of the sphere

a grain retailer puts a 1000 kg lead block under the platform of this scale. by how much does this increase the reading of the scale when 50kg sack of rice is on top of its platform, if the distance between their centers are .03 meter apart

For a reaction of conversion of ATP into ADP at 20⁰C, calculate the reaction Gibbs free energy. Given the change in enthalpy is 20.27 Kcal and the change in entropy is 85 cal/Kelvin

For a reaction glutamate + NH3 → glutamine + H2O that occurred at 20⁰C, calculate the Gibbs free energy change of the reaction. Given the change in enthalpy of 3103 cal and change of entropy of 3.4 cal/K

For a reaction that has ∆H of -30 kJ and ∆S of -62 J/K, estimate at what temperature will the reaction change from spontaneous to non-spontaneous reaction?

Determine change of entropy for a reaction: H2(g) + I2(g) → 2HI(g)

H2(g) - 130.58 I2(J/mol.K)

I2 - 116.73(J/mol.K)

HI(g) - 206.3(J/mol.K) 

1. The force of repulsion between two positive points charge 5 microfarads and 8microfarads separating at a distance of 0.02m apart is what?

Find the total resistance if three resistors are in parallel and again another two more resistors are in parallel again