# In a TV set, an electron beam moves with horizontal velocity of 4.2 × 107 m/s across the cathode ray tube and strikes the screen, 41 cm away. The acceleration of gravity is 9.8 m/s How far does the electron beam fall while traversing this distance (in m)?

We can get the time of flight from the horizontal component, which is constant:

Now we can consider the vertical component:

This must be an old question as I don't think there are many cathode ray t.v sets around anymore.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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