Solve Problems below using Newton's second Law: 1. A student pushes a hover ouck so that it accelerates at a rate of 2.7 m/s. If the puck is 0.84 kg, what is the force he must have applied? ​

Suppose that recording station n is located 200 km north of the epicenter of an earthquake, and recording station s is located 100 km south of the epicenter of the same earthquake. which of the following statements would be true?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Carbon is allowed to diffuse through a steel plate 15 mm thick. the concentrations of carbon at the two faces are 0.65 and 0.30 kg c/m^3 fe, which are maintained constant. if the preexponential and activation energy are 6.2 x 10-7 m2 /s and 80,000 j/mol, respectively, compute the temperature at which the diffusion flux is 1.43 x 10^-9 kg/m^2 -s.