When heating a liquid in a test tube, which of the following safety precautions should you take? . 1.wear latex gloves.. 2. heat the test tube on an open flame if possible.. 3. put a tight lid on the test tube.. 4. angle the test tube away from yourself and others..

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

The necleus of an atom is made up of what subatomic particles?