B= p=2a=2/16 10 ) 10 48x C 7-3-316 Practice 1) A metal cube of side 6 cm at 20°C on heating to 600°C increases by 0.3 cm Calculate a) The coefficient of linear expansion b) The coefficient of superficial expansion c) The coefficient of cubical (a) 86,2x1070 (b) 172.410/0 (c) 258.6x100 60

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.

In which of the following is positive work done by a person on a suitcase

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?