Which one of the following is not a safety rule in the laboratory.
a. to sit on a stool
b. to follow instructions
c. to wear shoes with hard soles
d. handling apparatus

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.