For a physics experiment, a solid cube is suspended from a spring scale. The gravitational force exerted on the cube is 0.714 N as measured when the object is suspended from a spring scale. When the suspended cube is submerged in water (ρ = 1000 kg/m3), the scale reads 0.450 N.   What is the mass of the object in grams?  Enter unit as “g”.

m1 and m2 are connected by a light string as shown in the graph.   Assume the pulley is frictionless.  Determine tension T in N.  Please enter your unit as “N”.

A box of mass m = 10.0 kg moving at 0.500 m/s is pushed by a force F = {F} N across a horizontal floor.  The applied force is directed at an angle θ = 60.0⁰ as shown in the drawing.  The coefficients of static and kinetic friction between the box and the floor are μs=0.400 and μk=0.300, respectively.  What is the work done by the force F after moving the box a distance of d = 10.0 m in joules?  Please enter your unit as “J”.

A 50 N of force F is applied to a block of 100 N as shown. The kinetic coefficient between the block and the supporting surface is 0.3.  Determine the acceleration of the block in m/s2. Enter your answer with two significant figures.   Please enter your unit as “m/s^2”.

A box of mass m = 10.0 kg moving at 0.500 m/s is pushed by a force F = {F} N across a horizontal floor.  The applied force is directed at an angle θ = 60.0⁰ as shown in the drawing.  The coefficients of static and kinetic friction between the box and the floor are μs=0.400 and μk=0.300, respectively.  What is the work done by the normal force after moving the box a distance of d = 10.0 m in joules? Please enter your unit as “J”.

A force is applied along the x-direction on a 5.0 kg object.  The force varies along its path as shown in the graph.   It lasts for {t} minute(s).  Find the average power, in Watt, the force delivered during that period.  Please enter your unit as “Watt”.  

A box of mass m = 10.0 kg moving at 0.500 m/s is pushed by a force F = {F} N across a horizontal floor.  The applied force is directed at an angle θ = 60.0⁰ as shown in the drawing.  The coefficients of static and kinetic friction between the box and the floor are μs=0.400 and μk=0.300, respectively.  This produces a maximum static friction of 81.6 N and kinetic friction of 61.2 N.  What is the work done by the frictional force after the box moved a distance of d = 10.0 m in Joules? Please enter your unit as “J”.

In a 2016 Oral Health Surveillance Report, almost _______ of 20 to 64-year-olds sampled had experienced dental caries.

What is the current recommendation for community water fluoridation?

Which of the following is considered a population-based initiative to improve oral health?