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A baby in a bouncer bounces up and down with a period of 1.2s and amplitude of 90mm. Calculate the baby's maximum velocity.

Relevant equations: 1) frequency = 1/ time period; 2) v(max) = Amplitude*(2pifrequency)

First, we need to calculate the frequency of the baby's oscillation. That is, the number of times, p...

Answered by Sam H. • Physics tutor

3636 Views

Experimentally, how would you calculate the Young's modulus of a material?

Young's modulus = stress/strain. Stress = F/A Strain= e/l. Measure the length of a wire between 2 points, placing a marker at each. Also measure the diameter to calculate the cross sectional area of the w...

Answered by Ben L. • Physics tutor

1956 Views

Show that gravitational force within a nuclei is negilible compared with the electric repulsion.

Electric Field Repulsion - 90N Gravitation Field Attraction - 7.3x10^-35N

Answered by Matthew S. • Physics tutor

2255 Views

Photons with 605 THz frequency strike metal of 1.2eV work function. Calculate the maximum energy of photoelectrons and their velocity. What amount of energy is necessary to stop all photoelectrons? (Planck's constant. electron mass and charge are given)

Start off by converting all given data into SI units to avoid confusion later on. The photoelectric effect happens when photons with energy larger than work function strike metal, thus releasing the elect...

Answered by Ignas V. • Physics tutor

2290 Views

The amplitude of a simple harmonic oscillator has decreased from 40cm to 38cm. What percentage of energy did the harmonic oscillator lose?

It is recommended to start off by converting all given data into SI units to avoid confusion later on. Write down the total energy of the system and that it is conserved: E(tot)= KE+PE and KE=(mv^2)/2; PE...

Answered by Ignas V. • Physics tutor

2301 Views