a piece of aluminium of mass 1kg is heated to 100celsius and then placed in 0.4kg of water at 20celius if the mixture reaches a temperature of 60celsius what is the specific heat capacity of the aluminium if that of water is 4200j/kg

The graph shown is a velocity-time graph of an object. what is the acceleration of the object from 6.0 to 10.0 seconds?

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.