PLEASE HELP ME WITH THOSE TWO QUESTIONS 1) How many kilograms of water at 100.0°C can be vaporized if 1278900 J of heat are added to the water? (Lv = 2.26 x 106 J/kg)

2) An unknown substance requires 32340 J of heat to melt. If the substance has a mass of 1.32 kg, what is the unknown substance?

Luke and carrie are driving down a straight section of the interstate at 70 mph in luke's new convertible. carrie is drinking a soda in the passenger seat. when she is done she tosses the bottle straight up in the air, just above the height of the car. what will happen to the bottle if air resistance is neglected? a. the bottle will land in carrie's lap. b. not enough information is given. c. the bottle will land on the interstate in front of the car. d. the bottle will land on the interstate behind the car.

Explain vector addition, triangle method and parallelogram method

You can watch static electricity in action by rubbing an inflated balloon against your hair. your hair will actually stand on its end! it does this because each hair becomes charged, and they all repel one another.