Use the table below to identify four substances that undergo a physical change if the temperature is reduced from 50oc to - 50oc. what is the physical change that takes place in each case.

What nonliving materials are important to living things?

The coefficient of kinetic friction between Gary's shoes and the wet kitchen floor is 0.28. If Gary has a mass of 52 kg, what is the force of kinetic friction acting on him as he slides across the floor?

An engineer uses aluminum to build an airplane rather than composite materials that are lighter and stronger. He does this because he is concerned about the composite materials and how suddenly they can fail. This is an example of:

When we jump on a concrete surface, the feet gets injured, why?

How is amplitude and frequency connected?

When sunlight strikes oil on the surface of water, a variety of colors are observed. What is the best explanation for this observation? A) Oil reflects the light and the lens of our eyes break it into component colors.

How is lifting a counterweight of a trebuchet considered doing work? Use the definition of work (W = Fd) in your description.

A pendulum takes. 5 seconds tp complete one cycle. what is the pendulum"s period and frequency?

Determine the answer to the equation 30 km/h * 17 h =

Do you think it would be possible to compress a gas to zero volume