(Q018) The Earth is round because a. the gravitational tug of the Moon has worn down the jagged edges. b. the solar wind has shaped it. c. erosion over time has worn down the jagged edges of its planetesimals. d. its interior rock is warm enough to flow slowly in response to gravity.

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?

What was the first instrument to ever record an earthquake?