The specific heat capacity of copper is three times the specific heat capacity of lead. equal masses of copper and lead are heated from room temperature to the temperature of boiling water. to achieve, this the amount of heat added to the copper the heat added to lead.

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

Explain why electric current cannot exist if a current doesn't have a voltage source.