Which of the following sets of data are precise and accurate if the accepted value is 4.59? Select one:
a. 4.56, 4.59, 4.60, 4.59
b. 4.59, 4.30, 4.67, 4.89
c. 3.81, 6.68, 6.20, 4.56
d. 2.58, 2.51, 2.56, 2.54

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?