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3 years ago

14

A vector is a quantity that has what two items

1 answer:

alexandr1967 [171]3 years ago

5 0

A vector has a size and a direction. The size is called the magnitude of the vector.

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Heat always flows from a _________ object to a __________ one.

satela [25.4K]

Heat always flows from a B. hotter object to a colder one.

Heat transfers always from hotter to colder.

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3 years ago

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When the direction of acceleration is opposite to the direction of velocity

wariber [46]

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A book with mass 2.3 kg sits on a table. What is the normal force on the

natita [175]

Explanation:

The table is level and there are no other forces on the book, so the normal force is equal to the weight.

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damaskus [11]

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F = mv^2 / r
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Sound exits a diffraction horn loudspeaker through a rectangular opening like a small doorway. Such a loudspeaker is mounted out

blondinia [14]

Answer:

$\theta = 20.98 degree$

Explanation:

As we know that the speed of the sound is given as

$v = 332 + 0.6 t$

now at t = 273 k = 0 degree

$v = 332 m/s$

so we have

$a sin\theta = N\lambda$

$a sin\theta = N(\frac{v_1}{f})$

now when temperature is changed to 313 K we have

$t = 313 - 273 = 40 degree$

now we have

$v = 332 + (0.6)(40)$

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$\frac{sin19.5}{sin\theta} = \frac{332}{356}$

so we have

$sin\theta = 0.358$

$\theta = 20.98 degree$

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3 years ago