When copper combines with oxygen to form copper oxide, the charge of the copper ion is

A car travels 30 km north in 25 min. and 40 km east in 35 min. What is the total distance traveled? 10 km 50 km 70 km cannot be determined

A 2-kg object is dropped from a height of 1000 m. What is the force of air resistance on the object when it reaches terminal velocity

Which statement best explains why Earth is not a perfect sphere? Earth revolves too quickly around the Sun Earth's spin on its axis causes the equator to bulge The circumference of the Earth is greater at its poles The gravity of the moon changes

A boy accelerates a 10 kg wagon from a velocity of 2 m/s to 4 m/s. How much work does the boy do on the wagon?

Compare solids, liquids, and gases in terms of their shape and volumes.

Work is a product of A force and distance B force and heat energy C cause and heat energy D cause and effect

An exploration submarine should be able to descend 1200 m down in the ocean. If the ocean density is 1020 kg/m3, what is the maximum pressure on the submarine hull?

Why cooking pans don't have have metal handles?

Why will marchers at the end of a long parade following a band be out of step with marchers nearer the band

How would you explain photosynthesis to a new student in class