3 years ago

Someone please help me

Physics

1 answer:

lesya692 [45]3 years ago

7 0

The First one! A.. Water freezes at 0 and boils mostly at 100 or more

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Pls help! True or False?

jasenka [17]

Answer:

True

Explanation:

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2 years ago

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Which nervous system consist of the brain and spine

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The CNS (Central Nervous System) consists of the brain and spinal cord.

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The motor of a washing machine rotates with a period of 28 ms. What is the angular speed, in units of rad/s?

pentagon [3]

Answer:

2π/[28 x (10^-3)]

Explanation:

Angular speed : ω=2π/T

T = 28ms = 28 x (10^-3) s

Angular speed = 2π/[28 x (10^-3)]

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3 years ago

The slope of a velocity versus time graph gives

Marina86 [1]

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3 years ago

Find the west component of 45 m 19º S of W

BaLLatris [955]

Answer:

The west component of the given vector is - 42.548 meters.

Explanation:

We need to translate the sentence into a vectoral expression in rectangular form, which is defined as:

$(x, y) = (r_{x}, r_{y})$

Where:

$r_{x}$ - Horizontal component of vector distance, measured in meters.

$r_{y}$ - Vertical component of vector distance, measured in meters.

Let suppose that east and north have positive signs, then we get the following expression:

$(x, y) = (-45\cdot \cos 19^{\circ}, -45\cdot \sin 19^{\circ})\,[m]$

$(x, y) = (-42.548,-14.651)\,[m]$

The west component corresponds to the first component of the ordered pair. That is to say:

$x = -42.548\,m$

The west component of the given vector is - 42.548 meters.

8 0

3 years ago