What causes cancer in cells?

A particle located at the position vector r= (i+2j) m has a force F= (2i+3j) N acting on it. Find the torque (in N*m) about the origin.

Ten girls, of mass m=35kg each, initially stand at different points on the rim of a merry-go-round (essentially a disk that spins).  The merry-go-round has a moment of inertia of 800 kgm^2 and a radius of 4.0m.  The merry-go-round has an initial angular velocity of 0.20 rad/s and rotates freely on frictionless bearings.  On a signal the girls all start to move toward the center of the merry-go-round until they reach a distance of 1.5m from the center, where they stand again.  Find the new angular velocity of the system (in rad/sec).

A wheel spinning on an axis through its center has a constant angular acceleration of 3.5 rad/s^2.  Assuming the wheel starts from rest, through what angle (in rad) must the wheel turn for the angular velocity to reach 140 rad/s?

The figure shows a uniform, horizontal beam (length = 10 m, mass = 35 kg) that is pivoted at the wall, with its far end supported by a cable that makes an angle of 51° with the horizontal. If a person (mass = 80 kg) stands 3.0 m from the pivot, what is the tension in the cable?

A wheel (radius = 0.40 m) starts from rest and rotates with a constant angular acceleration of 2.0 rad/s2. At the instant when the angular velocity is equal to 1.2 rad/s, what is the magnitude of the total linear acceleration (in m/s^2) of a point on the rim of the wheel?

Ten girls, of mass m=35kg each, initially stand at different points on the rim of a merry-go-round (essentially a disk that spins).  The merry-go-round has a moment of inertia of 800 kgm^2 and a radius of 4.0m.  The merry-go-round has an initial angular velocity of 0.20 rad/s and rotates freely on frictionless bearings.  On a signal the girls all start to move toward the center of the merry-go-round until they reach a distance of 1.5m from the center, where they stand again.  Find the new angular velocity of the system (in rad/sec).

Which of the following interventions targets a population at risk for a particular disease or condition?

Which of the following believed that disease was the cause of poverty?

By the year 2000, tuberculosis, gastroenteritis, and diphtheria fell of the list of top 10 causes of death. Which of the following is now on the list that was not on the list in 1900?