You hold your physics textbook in your hand. (Assume that no other objects are in contact with the book.) a. Identify the forces acting on the book.

1. book on hand
2. hand on book
3. floor on book
4. earth on book

b. For each force you identified in part (a), indicate the direction. (If a force is not applicable, choose NA.)

1, book on hand
2. hand on book
3. floor on book
4. earth on book

1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

The energy equivalent of the rest mass of an electron is