Unit Test — Cumulative exam Answers
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What must be included when describing the displacement of an object?
A
measurement and directionB
direction and speedC
total distance and positionD
speed and total distance
23
Scientists launch a rocket, and they monitor its acceleration and the force exerted by its engines. As the rocket gets higher, the monitors show that the acceleration of the rocket is increasing but the force exerted stays the same. How do Newton’s laws explain why the scientists could expect this to happen?
A
The total force stays the same, but the action force is increasing as the reaction decreases.B
The mass of the rocket decreases as fuel is burned, so the acceleration increases.C
The inertia of the rocket increases, which reduces the force needed to change its speed.D
The reaction force is increasing as fuel is burned, which causes a greater acceleration.24
How does Rutherford’s model of the atom compare with Thomson’s model?
A
They both describe atoms as small, indivisible spheres.B
They both describe electrons as moving around the nucleus.C
They both describe electrons as being surrounded by the positive matter.D
They both describe atoms as being made up of positive and negative matter.25
Students are completing a table about a particular subatomic particle that helps make up an atom.What best explains how they should complete the table?
A
with “Inside the nucleus,” because the particle is a protonB
with “Inside the nucleus,” because the particle is a neutronC
with “Outside the nucleus,” because the particle is a protonD
with “Outside the nucleus,” because the particle is an electronDid you find these answers helpful?
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