Jennifer was doing an experiment to find out which type of plant would grow the tallest in one month. for her experiment, jennifer chose four types of plants. she then put each plant in soil, placed the plants on the window, and watered the plants daily. she repeated the trial three times and recorded her results in the tables below
plant type growth (in inches)
1 5 in.
2 17 in.
3 8 in.
4 2 in.
plant type growth (in inches)
1 15 in.
2 8 in.
3 24 in.
4 17 in.
plant type growth (in inches)
1 21 in.
2 6 in.
3 14 in.
4 9 in.
from the results above, jennifer concluded that plant 1 grew the tallest in one month's time. is this a valid conclusion?
a yes. the data from the first two trials are wrong, and plant 1 is really the tallest.
b no. the data were different in each trial, so one valid conclusion could not be made.
c no. plant 2 grew the tallest of all the types of plants that she studied.
d yes. plant 1 was tallest in one of the trials, so the conclusion is valid.

The lights used by mark watley (played by matt damon) during the film the martian seem to be metal halide lamps. metal halide lamps are filled with vaporized mercury and metal-halogen compounds. when an electric current is passed through the lamp, the tube begins to glow a bright white/blue color. if you were to pass this light through a prism to separate the individual light frequencies, you would see a rainbow just as you would if using natural sunlight because of the complexity of the metal halide gas and the vast amount of possible electron transitions. (the study of light in this way is known as spectroscopy and allows astronomers to know exactly what atoms compose distant stars, simply by looking at the light they emit. the spectral lines an atom produces uniquely identifies that atom just like a fingerprint uniquely identifies a person. the momentum equation and energy equation that we have used above can be combined to give the following equation: c = e p where again p is the phonon momentum, e is the photon energy and c is the speed of light. when you divide the photon energy found in #6 by the photon momentum found in #4, do you get the speed of light? (if not, check your work for questions #4 through #6). yes no

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20