A disc is free to rotate in a horizontal plane about an axis through its centre o. A small object p is placed on the disc so that op=0.2m. Contact between the particle and the disc is rough and the coefficient of friction is 0.5. the disc then begins to rotate Find the angular velocity of the disc when the particle is about to slip

iron would move it is magnetic there is a mag field around the current in the wire

area of focus

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.