Question 6
John and Haven move a large bookcase from the bedroom to the living room. The bookcase has
a mass of 45 kg. They apply a force of 300 N to move the bookcase 8 m. It takes them 20
seconds to move the bookcase. (Use correct units in all answers.)
a. How much work do they do to move the bookcase? ( points)
6. What is their power? (3 points)

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

Which of the following is the result of the nuclear weak force? the instability of large nuclei the repelling force between positively charged protons the structure of the atom certain types of nuclear decay

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