Answers: 2
Physics, 22.06.2019 02:30, JOEFRESH10
Which of the following are properties of mechanical waves? check all that apply â•ď¸Ź particles of the medium move back and fourth, but do not move with the wave. â•ď¸Ź the particles of the medium always move parallel to the wave motion. â•ď¸Ź wave motion begins with a disturbance in the medium. â•ď¸Ź waves transport energy from a source outward, away from the source.
Answers: 2
Physics, 22.06.2019 06:00, ayoismeisalex
Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?
Answers: 1
Physics, 23.06.2019 00:40, maggie2018
Researchers conducted an experiment to identify the effects of three different hand sanitizers on the growth of bacteria. the researchers grew one type of bacteria in twenty-four identical covered petri dishes. then, they opened eighteen petri dishes and applied the three hand sanitizers to six petri dishes each. they left the remaining six petri dishes closed as a control group. when the researchers measured the growth of bacteria two days later, the six dishes that had no hand sanitizer showed the least amount of bacterial growth. the researchers concluded that not using any hand sanitizer would lead to the least bacterial growth. which statement best explains why the researchers’ conclusion was not justified? the experiment tested too many variables. the control group was not treated the same as the experimental group. the sample size of twenty-four petri dishes is not large enough. the single type of bacteria is not adequate to make any conclusions.
Answers: 1
Are rocky fragments left over from the formation of the solar system about 4.6 billion years ago.
Mathematics, 12.02.2020 02:18
Mathematics, 12.02.2020 02:18
English, 12.02.2020 02:18