How often do spring and neap tides occur?

a. twice a day

b. twice a month

c. every 27 3 days

d. every 24 hours

Which number is not rounded correctly? A. 0.0279 rounded to 0.028 B. 210.8 rounded to 210 C. 14.507 rounded to 14.510 D. 18.42 rounded to 18.4

What does Kinetic Energy depend on

When a passenger in train A looks at a passenger directly across in train B it appears that train B is not moving even though both trains are moving. How does the speed od train A compare to train B

Which statement (s) about galaxy groups is/are true? Choose one or more: A. Galaxy mergers in groups are not known to have ever happened B. Galaxies in a group are all moving away from each other. C.

Explain Hardy-Weinberg equilibrium and why it is so important, especially since all of its assumptions seem so unrealistic and difficult to meet.

Visualize five horizontal sedimentary strata exposed in a cliff or canyon wall identified by consecutive numbers, 1 being the lowest bed and 5 being the highest. Which of the following statements concerning the strata are true? a.

The characteristics that follow are characteristics of two of Galileo's surviving double-convex lenses. The numbers given are magnitudes only; you must supply the correct signs. L 1: front radius 950 mm, rear radius 2700 mm, refractive index 1.

Which car has the most kinetic energy? A car of mass 1500 kg with speed 5 m/s or A car of mass 1300 kg with speed 3 m/s or a car of mass 1200 kg with speed 2 m/s or a car mass 1400 kg with speed 4 m/s

A 500 kg table with 4 legs rests on solid flat ground. I place 3 books on the center of the table with masses of 10 kg, 20 kg and 30 kg respectively. What is the normal force between the ground and one leg of the table?

Fluorine-21 has a half-life of approximately 5 seconds. What percentage of the original nuclei would remain after 20 seconds