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Explain how a stationary wave is produced when a string fixed at both ends is plucked

When the string is plucked, waves will travel from the point where it was plucked to the fixed ends, which cannot move and so must be nodes. The waves will reflect, and the superposition of the reflected and...
JT
Answered by James T. • Physics tutor
16338 Views

What is the general equation for the alpha-decay of a nucleus X, with nucleon number A and proton number Z, into nucleon Y??

A Z X --> A - 4 z - 2 Y + 4 2 α During alpha-decay, the nuclus emits an alpha particle which consists of two protons and two neutrons (a totoal of 4 nucleons). Therefore the new nuclide formed will have a...
CT
Answered by Chloe T. • Physics tutor
3362 Views

Hydrogen has a single proton and a single electron. Find the electric potential at a distance of 0.50 * 10^(-10) (m) from the proton.

Ve = kQ/r = ((8.99 * 10^9) * (1.6 * 10 ^-19))/(0.5 * 10^-10) = 28.77 = 29 V
PM
Answered by Pablo M. • Physics tutor
2781 Views

Explain the photo-electric effect and describe how the intensity of light effects rate of electron emission.

The photo-electric effect is the way in which electrons are released from the surface of a metal when there is an incident light ray. The particle model of light, as part of wave-particle duality, suggests t...
IW
Answered by Ira W. • Physics tutor
4542 Views

Calculate the resistance of a uniform wire of diameter 0.5mm, length 2m and resistivity 1.7x10^-8Ωm.

R=ρ L/AR= (1.7*10^-8 2)/(0.0005^2 π/4)R=0.173Ω
HW
Answered by Heather W. • Physics tutor
2825 Views