During which step of the scientific method does a scientist make an educated guess about the outcome of an experiment?
A. Collect data
B. Form a hypothesis
C. Analyze the results
D. Design an experiment

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied. true or false

When you turn on a battery-operated device, an electrical circuit is

Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves