AnswersPBCSD_Grade_Forgiveness_2003310_Physical Science_S2_2022Lab: Newton's Laws of Motion

Lab: Newton's Laws of Motion — Cumulative exam Answers

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Which procedure will most increase the energy output of a nuclear reactor?

A
exposing the core to the outside world
B
removing fissile material from the core
C
decreasing the amount of steam produced
D
raising the control rods out of the reactor
22
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After a radioactive atom decays, it is the same element that it was before with no measurable change in mass. Which kind of decay has occurred, and how do you know?

A
alpha decay because alpha particles have no mass
B
beta decay because this kind of decay cannot change one element into another
C
alpha decay because it creates a new isotope of the same element
D
gamma decay because photons have no mass
23

Yolanda is studying two waves. The first wave has an amplitude of 2 m, and the second has an amplitude of 3 m.

A
She can use destructive interference to generate a wave with an amplitude of 3.1 m.
B
She can use constructive interference to generate a wave with an amplitude of 1.5 m.
C
She can use destructive interference to generate a wave with an amplitude of 0 m.
D
She can use constructive interference to generate a wave with an amplitude of 3.5 m.
24

Why would a doctor most likely restrict a patient’s contact with other people while the patient receives internal radiation?

A
The patient’s stress and anxiety would be eliminated.
B
High levels of radiation can diffuse through the patient’s skin.
C
Social contact would increase the effect of the radiation treatment.
D
Radioactive material can leave the patient’s body through saliva, sweat, and urine.
25

Which statement best describes heat and thermal energy?

A
They are different words for the same thing.
B
They represent different concepts.
C
Heat is what happens when thermal energy stops moving between substances.
D
Thermal energy is what happens when heat moves between substances.

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