How much pounds does it have?

Ultrasonic cleaners use the vibrations of sound waves to shake dirt away from object? What is more elastic iron or rubber? A bob of mass of 0.18 kilograms is released from a height of 45 meters above the ground level. What is the value of the kinetic energy gained by the bob at the ground level? How can the humidity be low when it feels humid? What energy transformation occurs in a windmill used to generate electricity? What changes may happen when heat transfers into or out of matter? how can wood float on oil but not a bottle? Is it possible to reverse entropy? Why is average speed used instead of just speed? Who is at fault if someone runs a red light causing you to rear end the person in front of you who stopped short to avoid the person who rand the red light? Is cleaning your room a physical change? What type of wave require a medium to travel through? Which direction is verticle? What heat transfer is opening a window in a hot room? What is A trough for carrying motar and bricks called? How much does a shadow weigh? Which of the following is not a sustainable form or energy production? On which property do the kinetic and potential energies of an object both always depend? What are the secondary constant of transmission line? What form of ionizing radiation can penetrate deeply?