of the triangle.

39. What is the law of gravitation?

40. Do you understand that there is any difference in the meaning of
the terms gravitation and gravity?

41. What is the law of falling bodies?

42. Express algebraically this law, taking v = velocity of falling
body; g = acceleration of gravity; and h = height.

43. What is the center of gravity of a body?

44. How is it found?

45. Where is the center of gravity of a homogeneous body whose sides
are all rectangles?

46. What is the specific gravity of a body?

47. What is the standard for solids and liquids?

48. What for gases?

49. What laws govern the pressure of liquids at rest?

50. How do you find the number of gallons of water to the cubic foot?

51. What is the weight of a gallon of water?