Which of the following permanent teeth typically has two roots?

Which of  the following is NOT a factor in causing tooth movement? 

When the first permanent tooth erupts, a child has a _______ dentition.

Mandibular second molars erupt at _________ years of age: 

This tooth  ________________________has one supplemental cusp

12.   A block is placed on an incline plane that is angled at 30-degrees with the horizontal. The coefficient of static friction between the block and the plane is 0.4. If the block is placed at rest on the incline it will 

15. A car travels at a steady 40.0 m/s around a horizontal curve of radius 200 m. What is the minimum coefficient of static friction between the road and the car’s tires that will allow the car to travel at this speed without sliding?   

5.  An elevator has a frayed cable which will break if the tension exceeds a certain value. Is the tension more likely to exceed this value if the elevator is 

15.  An object moves in uniform circular motion, which means that the speed is constant. Is there an acceleration on the object? 

What is the total time from set heading to destination (h:mins.)?