A heater that has a specification of 240 V, 2.0 kW takes 10s to raise the temperature of a liquid of mass 500g by 5 deg Celcius. What is the specific heat capacity of liquid ?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?