A23.5 g piece of aluminum metal is initially at 100.0°c. it is dropped into a coffee cup-calorimeter containing 130.0 g of water at a temperature of 23.0°c. after stirring, the final temperature of both copper and water is 26.0°c. assuming no heat losses, and that the specific heat capacity of water is 4.184 j/(g·°c), what is the molar heat capacity of aluminum, cm(al)?

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

Which object is most likely represented by a dot?

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)