10) A 280 kg medium grand piano is resting on an 18° inclined plane. In order to help get the piano up the plane you attach a rope to the piano and run it through a pulley system as
shown below. If the coefficient of static friction between the piano and the floor is 0.55,
with what force will you have to push to make the piano start to slide?

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

Consider the following position function. find (a) the velocity and the speed of the object and (b) the acceleration of the object. bold r left parenthesis t right parenthesisr(t)equals=left angle 6 t superscript 4 baseline comma 2 t cubed right angle6t4,2t3 for tgreater than or equals≥0

If element x has 99 protons how many electrons does it have