In introductory physics laboratories, a typical cavendish balance for measuring the gravitational constant g uses lead spheres of masses 1.56 kg and 21.1 g whose centers are separated by 5.34 cm. calculate the gravitational force between these spheres, treating each as a point mass located at the center of the sphere. the value of the universal gravitational constant is 6.67259 × 10−11 n · m2 /kg2 .

On a hot saturday morning while people are working inside, the air conditioner keeps the temperature inside the building at 22degreesc. at noon the air conditioner is turned off, and the people go home. the temperature outside is a constant 33degreesc for the rest of the afternoon. if the time constant for the building is 4 hr, what will be the temperature inside the building at 4 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? at 6 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? when will the temperature inside the building reach 24degreesc? 324281