Aforce of 450 n accelerates a box across a frictionless surface at a rate of 15 m/s2. find the mass of the box?

a) 30 n

b) 30 kg

c) 6,750 n

d) 6,750 kg

Agenerator converts mechanical energy to electrical energy. when a coil placed between two magnets rotates, the magnetic lines of force are disturbed. this induces a current in the coil. the image below shows a generator. what could be done to make the lamp brighter? a. decrease the size of the magnets b. turn the coil slower c. change the polarity of the magnets d. turn the coil faster

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Ablock of steel has a density of 0.29lbs per cubic inch. if the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight? a. 0.29lbs b. 0.58lbs c. 0.87lbs d. 1lbs