You know that ice floats in water. this is because
a. ice is less dense than water.
b. ice is making the water colder.
c. water is making the ice warmer.
d. ice is a solid and water is a liquid.

What was the first instrument to ever record an earthquake?

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?