Aboulder with a mass of 2,500 kg on a ledge 200 m above the ground falls. estimate the speed of the boulder just before it hits the ground.

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c.the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?

You can estimate the degree to which a bond between two atoms is ionic or covalent by calculating the