Which of the following is an example of convection?
a a hot object transferring heat to a cooler one
b the rays of the sun warming the earth
c a hot oven warming the air around it
d hot air rising and cooler air falling

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy

It is necessary to determine the specific heat of an unknown object. the mass of the object is 201.0g it is determined experimentally that it takes 15j to raise the temperature 10°c. what is the specific heat of the object? 3,020,000 j/kg ∙ k 1500 j/kg ∙ k 0.00130 j/kg ∙ k 7.46 j/kg ∙ k

An electrically isolated object is electrically neutral. what is the charge on the object if you remove three electrons?