Why is there a danger of explosion in places like coal mines where there are large quantities powdered, combustile material

What is the force that acts against motion

Energy can be used to do which of the following things? Select one: Make something hotter Make something move Lift something up All of these are correct

How are magnetic force and distance from an object related

How is potential energy classified

What is the relationship of an object's acceleration, its mass and the force applied to it?

A tradesman sharpens a knife by pushing it against the rim of a grindstone. The 35 cm diameter stone is spinning at 200 rpm and has a mass of 28 kg. The coefficient of kinetic friction between the knife and the stone is 0.20.

What is the unit for force we use when calculating F=ma?

A vector of magnitude 20 is added to a vector of magnitude 25. The magnitude of this sum. might be:. A. zero. B. 3. C. 12. D. 47. E. 50

Calculate the gravitational potential energy of a 10kg box on the top shelf of a closet, 2m above the floor

In late adulthood, changes in memory may bot be inevitable however, any decline in memory tends to invite