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2 years ago

10. On Christmas Eve night when all the Who's are sleeping, are they still using energy? Explain this by using

Physics

1 answer:

mel-nik [20]2 years ago

5 0

Answer:

Using the Law of Conservation of Energy is described below in details.

Explanation:

The law of conservation of energy tells that energy can not be produced nor stopped - only transformed from one kind of energy to different. This indicates that a system constantly has the same quantity of energy, unless it's combined from the outside. This law is extremely significant because it is a really easy process to figure out relevant knowledge about an article.

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In one of the original Doppler experiments, a tuba was played at a frequency of 64.0 Hz on a moving flat train car, and a second

wolverine [178]

Answer:

$f_{beat} = 1.64\ Hz$

Explanation:

given,

frequency of tuba.f = 64 Hz

Speed of train approaching, v = 8.50 m/s

beat frequency = ?

using Doppler's effect formula

$f' = f(\dfrac{v}{v-v_s})$

v_s is the velocity of the source

v is the speed of sound, v = 340 m/s

now,

$f' = 64\times (\dfrac{340}{340 - 8.50})$

f' = 65.64 Hz

now, beat frequency is equal to

$f_{beat} = f' - f$

$f_{beat} = 65.64 - 64$

$f_{beat} = 1.64\ Hz$

hence, beat frequency is equal to 1.64 Hz

3 0

3 years ago

A jogger moves from a position x =

vlada-n [284]

Answer:

3 m/s

Explanation:

We'll begin by calculating the change in displacement of the jogger. This can be obtained as follow:

Initial displacement (d₁) = 4 m

Final displacement (d₂) = 16 m

Change in displacement (Δd) =?

Δd = d₂ – d₁

Δd = 16 – 4

Δd = 12 m

Finally, we shall determine the determine the average velocity. This can be obtained as follow:

Change in displacement (Δd) = 12 m

Time (t) = 4 s

Velocity (v) =?

v = Δd / t

v = 12 / 4

v = 3 m/s

Thus, the average velocity of the jogger is 3 m/s

5 0

3 years ago

What would spines be helpful for?

ANEK [815]

A and c...............................

3 0

2 years ago

Read 2 more answers

Why does a skier wear polarized glasses instead of glasses that are used for reading?

Afina-wow [57]

<span>A skier wears polarized glasses instead of glasses that are used for reading because p</span><span>olarized glasses decrease reflected glare compared to regular glasses. (D)

Hope this answers your question correctly.</span>

8 0

2 years ago

Read 2 more answers

When determining whether a chemical reaction has taken place, you observe and look for several indicators. Which would be consid

Inga [223]

The answer is B.

A cannot be the answer is melting is a physical change. No chemical reaction took place.

B is the answer as it is a EXOTHERMIC REACTION so heat will be given off.

C cannot be the answer as dissolving is basically atoms becoming ions, not a chemical reaction whereby a reactant reacts with another reactant to form a product.

D cannot be the answer. Same reason as for why A is not the answer.

Cheers.

6 0

3 years ago