A 58kg soccer player, moving at 3.75m/s North hits another 56kg moving at 4.90m/s collide West and stick together. What is their speed and direction after collision

In a vernier instrument the main scale is in 1/2 mm divisions .vernier is made by redividing 19 such divisions into 20 equal parts. calculate the least count of the instrument.

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

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.