B) if the actual counterweight fitted to this boom was
2350n:
i) what additional downward force must be applied
by the car park attendant to lift the boom
ii) what will be the normal reaction, n, at the end
support when the boom is resting on it?

Which of the following is an example of units for speed

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct