Why would physical science be used to study light emitted by a star?
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a. light is very pretty.
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b. light is a form of energy.
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c. stars form interesting shapes in the sky.
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d. the positions of stars control our lives.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

What are the starting materials for nuclear fission? two small nuclei two large nuclei a neutron and a large nucleus a neutron and a small nucleus