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##1/f=1/u+1/u^’## ##triangle EFO is similar to triangle OIH## ##(bar (IH))/(bar (EF))=(bar(OI))/(bar(OF))## ##g:image height## ##c:object height## ##u:distance between object and lens## ##u^’:distance between image and lens## ##color(red)(g/c)=u^’/u## […]

The ball would travel 3 times as high. The equation for finding the displacement (vertical height in this case) of an object with a constant is: […]

##lambda=5m## ##v=f lambda## ##therefore lambda=v/f=(1430m//s)/(286Hz)=5m##.

I found ##9800N## The force should be its weight. This is the force (gravitational) between the Earth and the elevator…the only thing is that the Earth […]

The force ‘##F’=11.91k C^2//m^2##. The gives ##F=(k q_1q_2)/r^2## where ‘k’ is the proportionality constant. It is also called as coulomb’s constant as it as derived from […]

##4000## if doubled ##6000## if tripled Momentum=velocity x mass ##(mn =mv)## For initial stage ##mn = mv = 2000## if the speed is doubled ##mn = […]

It will be too long to type so here’s an image of the formulae: Image from: http://www.flinnsci.com/store/Scripts/prodView.asp?idproduct=21999 Hope this helps 🙂

Mass of the object and the distance between 2 objects of interest. We have the equation ##E_gravity=-GMm/r## ##G## is the universal gravitational constant. ##M## is the […]