A barbed-wire barrier erected by the East Germans between East and West Berlin that eventually was rebuilt of concrete

What's the nearest galaxy to the Milky Way

Seven times the number of quarters in a coin collection is the same as three times the number of quarters increased by 20. How many quarters in the collection

Andrea was watching her brother in the ocean and noticed that the waves were coming into the beach at a frequency of 0.777778 Hz. How many waves hit the beach in 27 s? Answer in units of waves.

The approximate mass of a nickel in kilograms is

Match each scenario to the form of energy it represents. Tiles a man jogging in the park a fully charged camera battery a stove burner that's turned on an apple on a tree Pairs radiant energy arrowBoth gravitational potential energy arrowBoth motion

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