Please help I really need this and please try to explain A 0.200 kg mass of lead is heated to 200°C. It is then placed in a 0.500 kg iron calorimeter containing 0.150 kg of water with an initial temperature of 30.0°C.
When the combination of the lead, the calorimeter, and the water reaches equilibrium, what is the final temperature?

A3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular? a 3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular?

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?