A235 g gold ball at a temperature of125°c is dropped into an insulated flask of water. the water was initially at a temperature of22°c. if the equilibrium temperature is 25°c, what is the mass of the water?

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z