Help me please! A cylinder contains water, the level of the water being 8cm above the bottom of the cylinder. A spherical metal bob of diameter 6cm was pat into the cylinder and the level - the water rose to 9cm find the internal diameter of the cylinder. A.8cm B. 10cm C. 12cm D. 16cm​

Most energy in an ecosystem comes originally from_

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.

Which situation will have the highest resistance? a.long wire and high temperatureb.short wire and high temperaturec.long wire and cold temperaturedshort wire and low temperature