A 12 g piece of aluminum is at 70°C. It is placed in a beaker filled with 34.8 g water at 15°C. The final temperature of the mixture is 18.8°C.

a. What is the energy gained by the water if the specific heat capacity is 4.18 J/gºC?

b. What is the energy lost by the aluminum if the specific heat capacity is 9 J/gºC?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

Which accounts for an increase in the temperature of a gas that is kept a constant volume