Who discovered that the proton has a positive charge

A medicine ball is dropped from a height of 1 m. It strikes the ground with an energy of 50 J. What is the mass of the medicine ball?

What is the area of soft cartilage where bone growth occurs

The kind of graph that would best show the results of a survey of 144 people where 75 ride a bus, 45 drive cars, 15 carpool, and 9 walk to work.

A device that transforms electrical energy to mechanical energy is a

The pressure inside a bottle of champagne is 5.99 atm higher than the air pressure outside. The neck of the bottle has an inner radius of 1.46 cm. What is the frictional force on the cork due to the neck of the bottle

What happens to the particles of the liquid inside a thermometer when the thermometer is heated? They slow down and spread apart. They speed up and spread apart. They slow down and move closer together. They speed up and move closer together.

You did 150 joules of work lifting a 120 - N backpack. how high did you lift the backpack? how much did the backpack weigh in pounds

After the layers of sediment are deposited in one place, they are

A rectangular gasoline tank can hold 50.0 kg of gasoline when full. What is the depth of the tank if it is 0.500-m wide by 0.900-m long, given that the density of gasoline is 6.8 x 102 kg/m3

Which statement best describes the kinetic theory of matter? Matter is made up of compounds that are in constant motion and have energy. Matter is made up of particles that seldom move and do not possess energy.