A teenager with mass of 51 kg pushes backward against the ground with her foot as she rides her skateboard. This exerts a horizontal force of magnitude Fpush. When a frictional force of 2.3 N is present the skateboard accelerates at 0.198 m/s2. If the skateboard has a mass of 2.1 kg, what is the magnitude of Fpush? Answer in N.

What type of electromagnetic wave is used in security pens? a. x-rays c. microwaves b. visible light d. ultraviolet radiation select the best answer from the choices provided

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

When using the scientist method, which step comes last?