Astudent uses a liquid thermometer to measure the temperature of a substance in a beaker during science class. the teacher says that the measurement is incorrect.
which are the most likely reasons the liquid thermometer could have measured the wrong temperature? check all that apply.
1. the thermometer was not calibrated electronically.
2. the software connected to the thermometer had errors.
3. the bulb of the thermometer was touching the beaker.
4. the thermometer's bulb was not submerged in the substance.
5. the student stirred the substance with the thermometer.

3

Explanation:

Allowing the thermometer bulb to touch the beaker will result in inaccurate readings because the thermometer will conduct heat from the beaker. This will be worse especially if the beaker is not at temperature equilibrium with the liquid inside. Also, don't handle the thermometer until the temperature levels off.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

a plastic spoon that has a temperature of 78° f is placed into a bowl of soup that has a temperature of 84° f. which of these correctly describes what will happen?

energy as heat moves from the soup to the spoon.