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 .

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical

Why is a noble gas different from other elements?