A large mining dump truck has a mass of 40,000 kg. If its engine produces 20,000N of force, how fast will the truck accelerate?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

2. circled insects have mutations, or changes to their dna. how many of the offspring insects in this generation have mutations?