5.9 Probability vs. Determinism

Select all that apply. Heisenberg's uncertainty principle tells us that

• we can know both an object's speed and position at a given time

• we can know either an object's speed or its position at any given time

• measuring an object's speed changes its position

• measuring an object's position changes its speed

• it is impossible to measure an object's speed or position

Heisenberg's uncertainty principle exists because

• light is a wave

• light is a particle

• matter is a wave

• matter is a particle

• everything in the universe is a wave and particle at the same time

Select all that apply to particles.

• easy to measure their position

• easy to measure their speed

• difficult to measure their position

• difficult to measure their speed

Select all that apply to waves.

• easy to measure their position

• difficult to measure their position

• easy to measure their speed

• difficult to measure their speed

To determine the speed and position of a particle, we must

• measure its speed then measure its position

• measure its position then measure its speed

• combining waves

• combining particles

Select all that apply to Heisenberg's uncertainty principle.

• decreasing the uncertainty in a particle's position decreases the uncertainty in a particle's speed

• decreasing the uncertainty in a particle's position increases the uncertainty in a particle's speed

• decreasing the uncertainty in a particle's speed decreases the uncertainty in a particle's position

• decreasing the uncertainty in a particle's speed increases the uncertainty in a particle's position

When it comes to electrons moving around an atom,

• we know where the electron will be at all times

• we never know where the electron is at any time

• we know where the electron might be at a given time based on probability

• the electron will probably leave the atom