The addition of 9.5 X 110^5 J of thermal energy is required to convert a block of ice at –15 °C to
water at 15 °C. What was the mass of the block of ice?

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

close lines strong magnet less close weaker

gas and liquid

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2